task_url stringlengths 30 116 | task_name stringlengths 2 86 | task_description stringlengths 0 14.4k | language_url stringlengths 2 53 | language_name stringlengths 1 52 | code stringlengths 0 61.9k |
|---|---|---|---|---|---|
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Scala | Scala | class Dot[T](v1: Seq[T])(implicit n: Numeric[T]) {
import n._ // import * operator
def dot(v2: Seq[T]) = {
require(v1.size == v2.size)
(v1 zip v2).map{ Function.tupled(_ * _)}.sum
}
}
object Main extends App {
implicit def toDot[T: Numeric](v1: Seq[T]) = new Dot(v1)
val v1 = List(1, 3, -5)
val v... |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #Ring | Ring |
sanitation= 0
see "police fire sanitation" + nl
for police = 2 to 7 step 2
for fire = 1 to 7
if fire = police
loop
ok
sanitation = 12 - police - fire
if sanitation = fire or sanitation = police
loop
ok
if sanitation >= 1 and sanitation <= ... |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #Ruby | Ruby |
(1..7).to_a.permutation(3){|p| puts p.join if p.first.even? && p.sum == 12 }
|
http://rosettacode.org/wiki/Delete_a_file | Delete a file | Task
Delete a file called "input.txt" and delete a directory called "docs".
This should be done twice: once "here", i.e. in the current working directory and once in the filesystem root.
| #Visual_Basic_.NET | Visual Basic .NET | 'Current Directory
IO.Directory.Delete("docs")
IO.Directory.Delete("docs", True) 'also delete files and sub-directories
IO.File.Delete("output.txt")
'Root
IO.Directory.Delete("\docs")
IO.File.Delete("\output.txt")
'Root, platform independent
IO.Directory.Delete(IO.Path.DirectorySeparatorChar & "docs")
IO.File.Delet... |
http://rosettacode.org/wiki/Delete_a_file | Delete a file | Task
Delete a file called "input.txt" and delete a directory called "docs".
This should be done twice: once "here", i.e. in the current working directory and once in the filesystem root.
| #Wren | Wren | import "io" for File
File.delete("input.txt")
// check it worked
System.print(File.exists("input.txt")) |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #R | R | > strings <- c("152", "-3.1415926", "Foo123")
> suppressWarnings(!is.na(as.numeric(strings)))
[1] TRUE TRUE FALSE
|
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Racket | Racket | (define (string-numeric? s) (number? (string->number s))) |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Scheme | Scheme | (define (dot-product a b)
(apply + (map * a b)))
(display (dot-product '(1 3 -5) '(4 -2 -1)))
(newline) |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Scilab | Scilab | A = [1 3 -5]
B = [4 -2 -1]
C = sum(A.*B) |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #Rust | Rust | extern crate num_iter;
fn main() {
println!("Police Sanitation Fire");
println!("----------------------");
for police in num_iter::range_step(2, 7, 2) {
for sanitation in 1..8 {
for fire in 1..8 {
if police != sanitation
&& sanitation != fire
... |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #Scala | Scala | val depts = {
(1 to 7).permutations.map{ n => (n(0),n(1),n(2)) }.toList.distinct // All permutations of possible department numbers
.filter{ n => n._1 % 2 == 0 } // Keep only even numbers favored by Police Chief
.filter{ n => n._1 + n._2 + n._3 == 12 } ... |
http://rosettacode.org/wiki/Delete_a_file | Delete a file | Task
Delete a file called "input.txt" and delete a directory called "docs".
This should be done twice: once "here", i.e. in the current working directory and once in the filesystem root.
| #X86_Assembly | X86 Assembly |
;syscall numbers for readability. :]
%define sys_rmdir 40
%define sys_unlink 10
section .text
global _start
_start:
mov ebx, fn
mov eax, sys_unlink
int 0x80
test eax, eax
js _ragequit
mov ebx, dn
mov eax, sys_rmdir
int 0x80
mov ebx, rfn
mov eax, sys_unlink
int 0x80
cmp eax, 0
je... |
http://rosettacode.org/wiki/Delete_a_file | Delete a file | Task
Delete a file called "input.txt" and delete a directory called "docs".
This should be done twice: once "here", i.e. in the current working directory and once in the filesystem root.
| #Yorick | Yorick | remove, "input.txt";
remove, "/input.txt";
rmdir, "docs";
rmdir, "/docs"; |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Raku | Raku | sub is-number-w-ws( Str $term --> Bool ) { # treat Falsey strings as numeric
$term.Numeric !~~ Failure;
}
sub is-number-wo-ws( Str $term --> Bool ) { # treat Falsey strings as non-numeric
?($term ~~ / \S /) && $term.Numeric !~~ Failure;
}
say " Coerce Don't coerce";
say ' String white... |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Seed7 | Seed7 | $ include "seed7_05.s7i";
$ syntax expr: .().dot.() is -> 6; # priority of dot operator
const func integer: (in array integer: a) dot (in array integer: b) is func
result
var integer: sum is 0;
local
var integer: index is 0;
begin
if length(a) <> length(b) then
raise RANGE_ERROR;
else
... |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Sidef | Sidef | func dot_product(a, b) {
(a »*« b)«+»;
};
say dot_product([1,3,-5], [4,-2,-1]); # => 3 |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #Sidef | Sidef | @(1..7)->combinations(3, {|*a|
a.sum == 12 || next
a.permutations {|*b|
b[0].is_even || next
say (%w(police fire sanitation) ~Z b -> join(" "))
}
}) |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #Swift | Swift | let res = [2, 4, 6].map({x in
return (1...7)
.filter({ $0 != x })
.map({y -> (Int, Int, Int)? in
let z = 12 - (x + y)
guard y != z && 1 <= z && z <= 7 else {
return nil
}
return (x, y, z)
}).compactMap({ $0 })
}).flatMap({ $0 })
for result in res {
p... |
http://rosettacode.org/wiki/Delete_a_file | Delete a file | Task
Delete a file called "input.txt" and delete a directory called "docs".
This should be done twice: once "here", i.e. in the current working directory and once in the filesystem root.
| #zig | zig | const std = @import("std");
const fs = std.fs;
pub fn main() !void {
const here = fs.cwd();
try here.deleteFile("input.txt");
try here.deleteDir("docs");
const root = try fs.openDirAbsolute("/", .{});
try root.deleteFile("input.txt");
try root.deleteDir("docs");
} |
http://rosettacode.org/wiki/Delete_a_file | Delete a file | Task
Delete a file called "input.txt" and delete a directory called "docs".
This should be done twice: once "here", i.e. in the current working directory and once in the filesystem root.
| #zkl | zkl | zkl: System.cmd((System.isWindows and "del" or "unlink") + " input.txt")
0
zkl: System.cmd((System.isWindows and "del" or "unlink") + " /input.txt")
unlink: cannot unlink ‘/input.txt’: No such file or directory
256
zkl: System.cmd("rmdir docs")
rmdir: failed to remove ‘docs’: Directory not empty
256
zkl: System.cmd("rm... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #RapidQ | RapidQ | isnumeric
$Typecheck on
Defint FALSE, TRUE
FALSE = 0
TRUE = NOT FALSE
Function isNumeric(s as string, optchar as string) as integer
If len(s) = 0 then
Result = FALSE
Exit Function
End If
if instr(s,"+") > 1 then
Result = FALSE
exit function
end if
if instr(... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #REBOL | REBOL |
rebol [
Title: "Is Numeric?"
URL: http://rosettacode.org/wiki/IsNumeric
]
; Built-in.
numeric?: func [x][not error? try [to-decimal x]]
; Parse dialect for numbers.
sign: [0 1 "-"]
digit: charset "0123456789"
int: [some digit]
float: [int "." int]
number: [
sign float ["e" | "E"] sign int |
sign in... |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Slate | Slate | v@(Vector traits) <dot> w@(Vector traits)
"Dot-product."
[
(0 below: (v size min: w size)) inject: 0 into:
[| :sum :index | sum + ((v at: index) * (w at: index))]
]. |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Smalltalk | Smalltalk | Array extend
[
* anotherArray [
|acc| acc := 0.
self with: anotherArray collect: [ :a :b |
acc := acc + ( a * b )
].
^acc
]
]
( #(1 3 -5) * #(4 -2 -1 ) ) printNl. |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #Tcl | Tcl |
# Procedure named ".." returns list of integers from 1 to max.
proc .. max {
for {set i 1} {$i <= $max} {incr i} {
lappend l $i
}
return $l
}
# Procedure named "anyEqual" returns true if any elements are equal,
# false otherwise.
proc anyEqual l {
if {[llength [lsort -unique $l]] != [llength $l]} {
... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Retro | Retro | '123 a:from-string TRUE [ swap c:digit? and ] a:reduce |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #REXX | REXX | /*REXX program determines if a string is numeric, using REXX's rules for numbers. */
yyy=' -123.78' /*or some such. */
/*strings below are all numeric (REXX).*/
zzz= ' -123.78 '
zzz= '-123.78'
zzz= '2'
zzz=... |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #SNOBOL4 | SNOBOL4 | define("dotp(a,b)sum,i") :(dotp_end)
dotp i = 1; sum = 0
loop sum = sum + (a<i> * b<i>)
i = i + 1 ?a<i> :s(loop)
dotp = sum :(return)
dotp_end
a = array(3); a<1> = 1; a<2> = 3; a<3> = -5;
b = array(3); b<1> = 4; b<2> = -2; b<3> = -1;
output = do... |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #SPARK | SPARK | with Spark_IO;
--# inherit Spark_IO;
--# main_program;
procedure Dot_Product_Main
--# global in out Spark_IO.Outputs;
--# derives Spark_IO.Outputs from *;
is
Limit : constant := 1000;
type V_Elem is range -Limit .. Limit;
V_Size : constant := 100;
type V_Index is range 1 .. V_Size;
type Vector is array(V... |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #Tiny_BASIC | Tiny BASIC | PRINT "Police Sanitation Fire"
PRINT "------|----------|----"
10 LET P = P + 2
LET S = 0
20 LET S = S + 1
LET F = 0
IF S = P THEN GOTO 20
30 LET F = F + 1
IF S = F THEN GOTO 30
IF F = P THEN GOTO 30
IF P + S + F = 12 THEN PRINT " ",P," ", S," ", F
IF F < 7 THEN GOTO 30
IF S <... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Ring | Ring |
see isdigit("0123456789") + nl + # print 1
isdigit("0123a") # print 0
|
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Ruby | Ruby | def is_numeric?(s)
begin
Float(s)
rescue
false # not numeric
else
true # numeric
end
end |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #SQL | SQL | SELECT i, k, SUM(A.N*B.N) AS N
FROM A INNER JOIN B ON A.j=B.j
GROUP BY i, k |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #Transd | Transd | #lang transd
MainModule : {
_start: (lambda
(lout "Police | Sanit. | Fire")
(for i in Range(1 8) where (not (mod i 2)) do
(for j in Range(1 8) where (neq i j) do
(for k in Range(1 8) where (and (neq i k) (neq j k)) do
(if (eq (+ i j k) 12) (lout i " "... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Run_BASIC | Run BASIC | print isNumeric("123")
print isNumeric("1ab")
' ------------------------
' Numeric Check
' 0 = bad
' 1 = good
' ------------------------
FUNCTION isNumeric(f$)
isNumeric = 1
f$ = trim$(f$)
if left$(f$,1) = "-" or left$(f$,1) = "+" then f$ = mid$(f$,2)
for i = 1 to len(f$)
d$ = mid$(f$,i,1)
if d$ = "," then ... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Rust | Rust | // This function is not limited to just numeric types but rather anything that implements the FromStr trait.
fn parsable<T: FromStr>(s: &str) -> bool {
s.parse::<T>().is_ok()
} |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Standard_ML | Standard ML | val dot = ListPair.foldlEq Real.*+ 0.0
(*
- dot ([1.0, 3.0, ~5.0], [4.0, ~2.0, ~1.0]);
val it = 3.0 : real
*) |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Stata | Stata | matrix a=1,3,-5
matrix b=4,-2,-1
matrix c=a*b'
di el("c",1,1) |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #TypeScript | TypeScript |
// Department numbers
console.log(`POLICE SANITATION FIRE`);
let f: number;
for (var p = 2; p <= 7; p += 2) {
for (var s = 1; s <= 7; s++) {
if (s != p) {
f = (12 - p) - s;
if ((f > 0) && (f <= 7) && (f != s) && (f != p))
console.log(` ${p} ${s} ${f}`);
}
}
}
|
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Scala | Scala |
import scala.util.control.Exception.allCatch
def isNumber(s: String): Boolean = (allCatch opt s.toDouble).isDefined
|
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Scheme | Scheme | (define (numeric? s) (string->number s)) |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Swift | Swift | func dot(v1: [Double], v2: [Double]) -> Double {
return reduce(lazy(zip(v1, v2)).map(*), 0, +)
}
println(dot([1, 3, -5], [4, -2, -1])) |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Tcl | Tcl | package require math::linearalgebra
set a {1 3 -5}
set b {4 -2 -1}
set dotp [::math::linearalgebra::dotproduct $a $b]
proc pp vec {return \[[join $vec ,]\]}
puts "[pp $a] \u2219 [pp $b] = $dotp" |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #Visual_Basic_.NET | Visual Basic .NET | Module Module1
Sub Main()
For p = 2 To 7 Step 2
For s = 1 To 7
Dim f = 12 - p - s
If s >= f Then
Exit For
End If
If f > 7 Then
Continue For
End If
If s = p Or... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Seed7 | Seed7 | $ include "seed7_05.s7i";
include "scanstri.s7i";
const func boolean: isNumeric (in var string: stri) is func
result
var boolean: isNumeric is FALSE;
local
var string: numberStri is "";
begin
numberStri := getNumber(stri);
isNumeric := stri = "";
end func; |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Sidef | Sidef | say "0.1E-5".looks_like_number; #=> true |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #TI-83_BASIC | TI-83 BASIC | sum({1,3,–5}*{4,–2,–1}) |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #TI-89_BASIC | TI-89 BASIC | dotP([1, 3, –5], [4, –2, –1]) |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #Vlang | Vlang | fn main() {
println("Police Sanitation Fire")
println("------ ---------- ----")
mut count := 0
for i := 2; i < 7; i += 2 {
for j in 1..8 {
if j == i { continue }
for k in 1..8 {
if k == i || k == j { continue }
if i + j + k != 12 { cont... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Simula | Simula | BEGIN
BOOLEAN PROCEDURE ISNUMERIC(W); TEXT W;
BEGIN
BOOLEAN PROCEDURE MORE;
MORE := W.MORE;
CHARACTER PROCEDURE NEXT;
NEXT := IF MORE THEN W.GETCHAR ELSE CHAR(0);
CHARACTER PROCEDURE LAST;
LAST := IF W.LENGTH = 0
THEN CHAR(0)
... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Smalltalk | Smalltalk | String extend [
realIsNumeric [
(self first = $+) |
(self first = $-)
ifTrue: [
^ (self allButFirst) isNumeric
]
ifFalse: [
^ self isNumeric
]
]
]
{ '1234'. "true"
'3.14'. '+3.8111'. "true"
'+45'. "true"
'-3.78'. ... |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Ursala | Ursala | #import int
dot = sum:-0+ product*p
#cast %z
test = dot(<1,3,-5>,<4,-2,-1>) |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #VBA | VBA | Private Function dot_product(x As Variant, y As Variant) As Double
dot_product = WorksheetFunction.SumProduct(x, y)
End Function
Public Sub main()
Debug.Print dot_product([{1,3,-5}], [{4,-2,-1}])
End Sub |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #VTL-2 | VTL-2 | 10 P=2
20 S=1
30 F=1
40 #=0<((P=S)+(P=F)+(S=F)+(P+S+F=12=0))*110
50 ?=P
60 $=32
70 ?=S
80 $=32
90 ?=F
100 ?=""
110 F=F+1
120 #=F<8*40
130 S=S+1
140 #=S<8*30
150 P=P+2
160 #=P<8*20 |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #Wren | Wren | System.print("Police Sanitation Fire")
System.print("------ ---------- ----")
var count = 0
for (h in 1..3) {
var i = h * 2
for (j in 1..7) {
if (j != i) {
for (k in 1..7) {
if ((k != i && k != j) && (i + j + k == 12) ) {
System.print(" %(i) %... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #SNOBOL4 | SNOBOL4 | define('nchk(str)') :(nchk_end)
nchk convert(str,'real') :s(return)f(freturn)
nchk_end
* # Wrapper for testing
define('isnum(str)') :(isnum_end)
isnum isnum = 'F'; isnum = nchk(str) 'T'
isnum = isnum ': ' str :(return)
isnum_end
* # Test and display
o... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #SQL | SQL | DECLARE @s VARCHAR(10)
SET @s = '1234.56'
print isnumeric(@s) --prints 1 if numeric, 0 if not.
IF isnumeric(@s)=1 BEGIN print 'Numeric' END
ELSE print 'Non-numeric' |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #VBScript | VBScript |
WScript.Echo DotProduct("1,3,-5","4,-2,-1")
Function DotProduct(vector1,vector2)
arrv1 = Split(vector1,",")
arrv2 = Split(vector2,",")
If UBound(arrv1) <> UBound(arrv2) Then
WScript.Echo "The vectors are not of the same length."
Exit Function
End If
DotProduct = 0
For i = 0 To UBound(arrv1)
DotProduct =... |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #XPL0 | XPL0 |
\Department numbers
code CrLf=9, IntIn=10, IntOut=11, Text=12;
integer P, S, F;
begin
Text(0, "POLICE SANITATION FIRE");
CrLf(0);
P:= 2;
while P <= 7 do
begin
for S:= 1, 7 do
if S # P then
begin
F:= (12 - P) - S;
if (F > 0) & (F <= 7) & (F # S) & (F # P) then
begin
Text(0, ... |
http://rosettacode.org/wiki/Department_numbers | Department numbers | There is a highly organized city that has decided to assign a number to each of their departments:
police department
sanitation department
fire department
Each department can have a number between 1 and 7 (inclusive).
The three department numbers are to be unique (different from each other) and mu... | #zkl | zkl | Utils.Helpers.pickNFrom(3,[1..7].walk()) // 35 combos
.filter(fcn(numbers){ numbers.sum(0)==12 }) // which all sum to 12 (==5)
.println(); |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #SQL_PL | SQL PL |
--#SET TERMINATOR @
CREATE OR REPLACE FUNCTION IS_NUMERIC (
IN STRING VARCHAR(10)
) RETURNS SMALLINT
-- ) RETURNS BOOLEAN
BEGIN
DECLARE RET SMALLINT;
-- DECLARE RET BOOLEAN;
DECLARE TMP INTEGER;
DECLARE CONTINUE HANDLER FOR SQLSTATE '22018'
SET RET = 1;
-- SET RET = FALSE;
SET RET = 0;
--... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Standard_ML | Standard ML | (* this function only recognizes integers in decimal format *)
fun isInteger s = case Int.scan StringCvt.DEC Substring.getc (Substring.full s) of
SOME (_,subs) => Substring.isEmpty subs
| NONE => false
fun isReal s = case Real.scan Substring.getc (Substring.full s) of
SOME (_,subs) => Substring.isEmpt... |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Visual_Basic | Visual Basic | Option Explicit
Function DotProduct(a() As Long, b() As Long) As Long
Dim l As Long, u As Long, i As Long
Debug.Assert DotProduct = 0 'return value automatically initialized with 0
l = LBound(a())
If l = LBound(b()) Then
u = UBound(a())
If u = UBound(b()) Then
For i = l To u
DotProduct = D... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Swift | Swift | func isNumeric(a: String) -> Bool {
return Double(a) != nil
} |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Tcl | Tcl | proc isNumeric str {string is double -strict $str} |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Visual_Basic_.NET | Visual Basic .NET | Module Module1
Function DotProduct(a As Decimal(), b As Decimal()) As Decimal
Return a.Zip(b, Function(x, y) x * y).Sum()
End Function
Sub Main()
Console.WriteLine(DotProduct({1, 3, -5}, {4, -2, -1}))
Console.ReadLine()
End Sub
End Module |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #TMG | TMG | prog: ignore(<< >>)
parse(line)\prog
parse(error)\prog;
line: number *;
number: ignore(none)
sign float (exp | ={})
= { < True: > 3 2 1 * };
sign: <+>={} | <->={<->} | ={};
float: int ( <.> decim = { 2 <.> 1 } | = { 1 } )
| <.> int = { <.> 1 };
int: smark any(digit) strin... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Toka | Toka | [ ( string -- flag )
>number nip ] is isNumeric
( Some tests )
decimal
" 100" isNumeric . ( succeeds, 100 is a valid decimal integer )
" 100.21" isNumeric . ( fails, 100.21 is not an integer)
" a" isNumeric . ( fails, 'a' is not a valid integer in the decimal base )
" $a" isNumeric . ( succeeds, bec... |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Vlang | Vlang | fn dot(x []int, y []int) ?int {
if x.len != y.len {
return error("incompatible lengths")
}
mut r := 0
for i, xi in x {
r += xi * y[i]
}
return r
}
fn main() {
d := dot([1, 3, -5], [4, -2, -1])?
println(d)
} |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Wart | Wart | def (dot_product x y)
(sum+map (*) x y) |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #True_BASIC | True BASIC |
DECLARE FUNCTION isnumeric$
LET true$ = "True"
LET false$ = "False"
LET s$ = "-152.34"
PRINT s$, " => "; isnumeric$(s$)
LET s$ = "1234.056789"
PRINT s$, " => "; isnumeric$(s$)
LET s$ = "1234.56"
PRINT s$, " => "; isnumeric$(s$)
LET s$ = "021101"
PRINT s$, " => "; isnumeric$(s$)
LET s$ = "Dog"
PRINT s$, " => "; isnu... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #UNIX_Shell | UNIX Shell |
#!/bin/bash
isnum() {
printf "%f" $1 >/dev/null 2>&1
}
check() {
if isnum $1
then
echo "$1 is numeric"
else
echo "$1 is NOT numeric"
fi
}
check 2
check -3
check +45.44
check -33.332
check 33.aa
check 3.3.3
|
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Wren | Wren | class Vector {
construct new(a) {
if (a.type != List || a.count == 0 || !a.all { |i| i is Num }) {
Fiber.abort("Argument must be a non-empty list of numbers.")
}
_a = a
}
a { _a }
length { _a.count }
dot(other) {
if (other.type != Vector || length != o... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Ursa | Ursa | def isnum (string str)
try
double str
return true
catch valueerror
return false
end try
end isnum |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #VBA | VBA | Sub Main()
Debug.Print Is_Numeric("")
Debug.Print Is_Numeric("-5.32")
Debug.Print Is_Numeric("-51,321 32")
Debug.Print Is_Numeric("123.4")
Debug.Print Is_Numeric("123,4")
Debug.Print Is_Numeric("123;4")
Debug.Print Is_Numeric("123.4x")
End Sub
Private Function Is_Numeric(s As String) As Bo... |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #X86_Assembly | X86 Assembly | format PE64 console
entry start
include 'win64a.inc'
section '.text' code readable executable
start:
stdcall dotProduct, vA, vB
invoke printf, msg_num, rax
stdcall dotProduct, vA, vC
invoke printf, msg_num, rax
invoke ExitProcess, 0
proc dotProduct vectorA... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #VBScript | VBScript | IsNumeric(Expr) |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Vedit_macro_language | Vedit macro language | :IS_NUMERIC:
if (Num_Eval(SUPPRESS)==0 && Cur_Char != '0') {
Return(FALSE)
} else {
Return(TRUE)
} |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #XPL0 | XPL0 | include c:\cxpl\codes;
func DotProd(U, V, L);
int U, V, L;
int S, I;
[S:= 0;
for I:= 0 to L-1 do S:= S + U(I)*V(I);
return S;
];
[IntOut(0, DotProd([1, 3, -5], [4, -2, -1], 3));
CrLf(0);
] |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Yabasic | Yabasic |
sub sq_mul(a(), b(), c())
local n, i
n = arraysize(a(), 1)
for i = 1 to n
c(i) = a(i) * b(i)
next i
end sub
sub sq_sum(a())
local n, i, r
n = arraysize(a(), 1)
for i = 1 to n
r = r + a(i)
next i
return r
end sub
dim a(3), b(3), c(3)
a(1) = 1 : a(2) = 3 : a(3) = -5
b(1) = 4 : b(2) = -2 : b(3... |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Visual_Basic_.NET | Visual Basic .NET | Dim Value As String = "+123"
If IsNumeric(Value) Then
PRINT "It is numeric."
End If |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Vlang | Vlang | import strconv
fn is_numeric(s string) bool {
strconv.atof64(s) or {
return false
}
return true
}
fn main() {
println("Are these strings numeric?")
strings := ["1", "3.14", "-100", "1e2", "NaN", "rose", "0xff", "0b110"]
for s in strings {
println(" ${s:4} -> ${is_numeric(s)}")
}
} |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #Zig | Zig | const std = @import("std");
const Vector = std.meta.Vector;
pub fn main() !void {
const a: Vector(3, i32) = [_]i32{1, 3, -5};
const b: Vector(3, i32) = [_]i32{4, -2, -1};
var dot: i32 = @reduce(.Add, a*b);
try std.io.getStdOut().writer().print("{d}\n", .{dot});
} |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #zkl | zkl | fcn dotp(a,b){Utils.zipWith('*,a,b).sum()} |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Wren | Wren | import "/fmt" for Fmt
System.print("Are these strings numeric?")
for (s in ["1", "3.14", "-100", "1e2", "NaN", "0xaf", "rose"]) {
var i = Num.fromString(s) // returns null if 's' is not numeric
System.print(" %(Fmt.s(4, s)) -> %((i != null) ? "yes" : "no")")
} |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #XLISP | XLISP | (DEFUN NUMERICP (X)
(IF (STRING->NUMBER X) T)) |
http://rosettacode.org/wiki/Dot_product | Dot product | Task
Create a function/use an in-built function, to compute the dot product, also known as the scalar product of two vectors.
If possible, make the vectors of arbitrary length.
As an example, compute the dot product of the vectors:
[1, 3, -5] and
[4, -2, -1]
If implementing the dot ... | #ZX_Spectrum_Basic | ZX Spectrum Basic | 10 DIM a(3): LET a(1)=1: LET a(2)=3: LET a(3)=-5
20 DIM b(3): LET b(1)=4: LET b(2)=-2: LET b(3)=-1
30 LET sum=0
40 FOR i=1 TO 3: LET sum=sum+a(i)*b(i): NEXT i
50 PRINT sum |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #zkl | zkl | fcn isNum(text){
try{ text.toInt(); True }
catch{ try{ text.toFloat(); True }
catch{ False }
}
} |
http://rosettacode.org/wiki/Determine_if_a_string_is_numeric | Determine if a string is numeric | Task
Create a boolean function which takes in a string and tells whether it is a numeric string (floating point and negative numbers included) in the syntax the language uses for numeric literals or numbers converted from strings.
Other tasks related to string operations:
Metrics
Array length
String length
Cop... | #Zoea | Zoea |
program: numeric
case: 1 input: '1' output: true
case: 2 input: '-3' output: true
case: 3 input: '22.7' output: true
case: 4 input: 'a' output: false
case: 5 input: 'Fred' output: false
case: 6 input: '' output: false
|
http://rosettacode.org/wiki/Deceptive_numbers | Deceptive numbers | Repunits are numbers that consist entirely of repetitions of the digit one (unity). The notation Rn symbolizes the repunit made up of n ones.
Every prime p larger than 5, evenly divides the repunit Rp-1.
E.G.
The repunit R6 is evenly divisible by 7.
111111 / 7 = 15873
The repunit R42 is evenly divisible by 43.
1... | #ALGOL_68 | ALGOL 68 | BEGIN # find repunits (all digits are 1 ) such that R(n-1) is divisible by n and n is not prime #
# R(n) is the nth repunit, so has n 1s #
PR precision 8000 PR # set precision of LONG LONG INT, enough for up to R(8000) #
PR read "primes.incl.a... |
http://rosettacode.org/wiki/Deceptive_numbers | Deceptive numbers | Repunits are numbers that consist entirely of repetitions of the digit one (unity). The notation Rn symbolizes the repunit made up of n ones.
Every prime p larger than 5, evenly divides the repunit Rp-1.
E.G.
The repunit R6 is evenly divisible by 7.
111111 / 7 = 15873
The repunit R42 is evenly divisible by 43.
1... | #Arturo | Arturo | deceptive?: function [n][
and? -> not? prime? n
-> zero? (to :integer repeat "1" n-1) % n
]
cnt: 0
i: 3
while [cnt < 10][
if deceptive? i [
print i
cnt: cnt + 1
]
i: i + 2
] |
http://rosettacode.org/wiki/Deceptive_numbers | Deceptive numbers | Repunits are numbers that consist entirely of repetitions of the digit one (unity). The notation Rn symbolizes the repunit made up of n ones.
Every prime p larger than 5, evenly divides the repunit Rp-1.
E.G.
The repunit R6 is evenly divisible by 7.
111111 / 7 = 15873
The repunit R42 is evenly divisible by 43.
1... | #C.2B.2B | C++ | #include <gmpxx.h>
#include <iomanip>
#include <iostream>
bool is_prime(int n) {
if (n < 2)
return false;
if (n % 2 == 0)
return n == 2;
if (n % 3 == 0)
return n == 3;
for (int p = 5; p * p <= n; p += 4) {
if (n % p == 0)
return false;
p += 2;
... |
http://rosettacode.org/wiki/Deceptive_numbers | Deceptive numbers | Repunits are numbers that consist entirely of repetitions of the digit one (unity). The notation Rn symbolizes the repunit made up of n ones.
Every prime p larger than 5, evenly divides the repunit Rp-1.
E.G.
The repunit R6 is evenly divisible by 7.
111111 / 7 = 15873
The repunit R42 is evenly divisible by 43.
1... | #F.23 | F# |
// Deceptive numbers. Nigel Galloway: February 13th., 2022
Seq.unfold(fun n->Some(n|>Seq.filter(isPrime>>not)|>Seq.filter(fun n->(10I**(n-1)-1I)%(bigint n)=0I),n|>Seq.map((+)30)))(seq{1;7;11;13;17;19;23;29})|>Seq.concat|>Seq.skip 1
|>Seq.chunkBySize 10|>Seq.take 7|>Seq.iter(fun n->n|>Array.iter(printf "%7d "); printf... |
http://rosettacode.org/wiki/Deceptive_numbers | Deceptive numbers | Repunits are numbers that consist entirely of repetitions of the digit one (unity). The notation Rn symbolizes the repunit made up of n ones.
Every prime p larger than 5, evenly divides the repunit Rp-1.
E.G.
The repunit R6 is evenly divisible by 7.
111111 / 7 = 15873
The repunit R42 is evenly divisible by 43.
1... | #Factor | Factor | USING: io kernel lists lists.lazy math math.functions
math.primes prettyprint ;
: repunit ( m -- n ) 10^ 1 - 9 / ;
: composite ( -- list ) 4 lfrom [ prime? not ] lfilter ;
: deceptive ( -- list )
composite [ [ 1 - repunit ] keep divisor? ] lfilter ;
10 deceptive ltake [ pprint bl ] leach nl |
http://rosettacode.org/wiki/Deceptive_numbers | Deceptive numbers | Repunits are numbers that consist entirely of repetitions of the digit one (unity). The notation Rn symbolizes the repunit made up of n ones.
Every prime p larger than 5, evenly divides the repunit Rp-1.
E.G.
The repunit R6 is evenly divisible by 7.
111111 / 7 = 15873
The repunit R42 is evenly divisible by 43.
1... | #Fermat | Fermat | Func Rep(n)=Sigma<m=0,n-1>[10^m].;
c:=0;
n:=3;
while c<10 do
n:=n+1;
if Isprime(n)>1 and Divides(n,Rep(n-1)) then !!n; c:+; fi
od; |
http://rosettacode.org/wiki/Deceptive_numbers | Deceptive numbers | Repunits are numbers that consist entirely of repetitions of the digit one (unity). The notation Rn symbolizes the repunit made up of n ones.
Every prime p larger than 5, evenly divides the repunit Rp-1.
E.G.
The repunit R6 is evenly divisible by 7.
111111 / 7 = 15873
The repunit R42 is evenly divisible by 43.
1... | #Go | Go | package main
import (
"fmt"
"math/big"
"rcu"
)
func main() {
count := 0
limit := 25
n := int64(17)
repunit := big.NewInt(1111111111111111)
t := new(big.Int)
zero := new(big.Int)
eleven := big.NewInt(11)
hundred := big.NewInt(100)
var deceptive []int64
for count < ... |
http://rosettacode.org/wiki/Deceptive_numbers | Deceptive numbers | Repunits are numbers that consist entirely of repetitions of the digit one (unity). The notation Rn symbolizes the repunit made up of n ones.
Every prime p larger than 5, evenly divides the repunit Rp-1.
E.G.
The repunit R6 is evenly divisible by 7.
111111 / 7 = 15873
The repunit R42 is evenly divisible by 43.
1... | #J | J | R=: (10x #. #&1)"0
deceptive=: 1&p: < 0 = ] | R@<:
2+I.deceptive 2+i.10000
91 259 451 481 703 1729 2821 2981 3367 4141 4187 5461 6533 6541 6601 7471 7777 8149 8401 8911 10001 |
http://rosettacode.org/wiki/Deceptive_numbers | Deceptive numbers | Repunits are numbers that consist entirely of repetitions of the digit one (unity). The notation Rn symbolizes the repunit made up of n ones.
Every prime p larger than 5, evenly divides the repunit Rp-1.
E.G.
The repunit R6 is evenly divisible by 7.
111111 / 7 = 15873
The repunit R42 is evenly divisible by 43.
1... | #Julia | Julia | using Primes
function deceptives(numwanted)
n, r, ret = 2, big"1", Int[]
while length(ret) < numwanted
!isprime(n) && r % n == 0 && push!(ret, n)
n += 1
r = 10r + 1
end
return ret
end
@time println(deceptives(30))
|
http://rosettacode.org/wiki/Deceptive_numbers | Deceptive numbers | Repunits are numbers that consist entirely of repetitions of the digit one (unity). The notation Rn symbolizes the repunit made up of n ones.
Every prime p larger than 5, evenly divides the repunit Rp-1.
E.G.
The repunit R6 is evenly divisible by 7.
111111 / 7 = 15873
The repunit R42 is evenly divisible by 43.
1... | #Mathematica.2FWolfram_Language | Mathematica/Wolfram Language | ClearAll[DeceptiveNumberQ]
DeceptiveNumberQ[n_Integer] := If[! PrimeQ[n], PowerMod[10, n - 1, 9 n] == 1]
c = 0;
out = Reap[Do[
If[DeceptiveNumberQ[i],
Sow[i];
c++;
If[c >= 1000, Break[]]
]
,
{i, 2, \[Infinity]}
]][[2, 1]];
Print["The first 100:"]
Multicolumn[Take[out, 100], A... |
http://rosettacode.org/wiki/Deceptive_numbers | Deceptive numbers | Repunits are numbers that consist entirely of repetitions of the digit one (unity). The notation Rn symbolizes the repunit made up of n ones.
Every prime p larger than 5, evenly divides the repunit Rp-1.
E.G.
The repunit R6 is evenly divisible by 7.
111111 / 7 = 15873
The repunit R42 is evenly divisible by 43.
1... | #PARI.2FGP | PARI/GP | Rep(n)=sum(X=0,n-1,10^X)
c=0
n=4
while(c<10,if(!isprime(n)&&Rep(n-1)%n==0,c=c+1;print(n));n=n+1) |
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