Datasets:
Corpus-NZ
/
Code-Syntax-Expanded

Dataset card Data Studio Files
xet
 Community
wrong_code
stringlengths
3
123
correct_code
stringlengths
3
155
explanation
stringclasses
101 values
language
stringclasses
26 values
let item = 67; item += 1;
let mut item = 67; item += 1;
Need mut to modify.
Rust
echo 'info'
echo 'info';
Add semicolon.
PHP
System.out.println('info')
System.out.println('info');
Add semicolon.
Java
for (val in arr)
for (val of arr)
for...in iterates keys.
JavaScript
<p>output <b>data</p></b>
<p>output <b>data</b></p>
Nest properly.
HTML
echo message world
echo 'message world'
Quote to prevent splitting.
Shell
println('value')
println("value")
Double quotes.
Scala
try {{ throw 'hello'; }} catch(e) {{}}
try {{ throw new Error('hello'); }} catch(e) {{}}
Throw Error objects.
JavaScript
let s = String::from("test"); let r=&s; s.push_str("!");
let mut s = String::from("test"); let r=&s; println!("{{}}", r); s.push_str("!");
Cannot mutate while borrowed.
Rust
if count = 90:
if count == 90:
Use == for comparison.
Python
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
compute
compute()
Add parentheses.
Kotlin
<img src='message.jpg'>
<img src='message.jpg' alt='desc'>
Add alt text.
HTML
<user name='hello'/>
<user name="hello"/>
Double quotes.
XML
console.log('message'
console.log('message')
Close parenthesis.
JavaScript
int[] items = new int[39]; items[39] = 5;
int[] items = new int[39]; if (39 < items.length) items[39] = 5;
Check bounds.
Java
[86, 45, 10
[86, 45, 10]
Close bracket.
Python
let s1 = String::from("output"); let s2 = s1; println!("{{}}", s1);
let s1 = String::from("output"); let s2 = s1.clone(); println!("{{}}", s1);
Clone to avoid move.
Rust
'info' + 17
'info' + 17.to_s
Convert int.
Ruby
<div><p>data</div></p>
<div><p>data</p></div>
Nest properly.
HTML
if (b = 64)
if (b == 64)
Use ==.
C++
switch(data){{ case 76: break; }}
switch(data){{ case 76: break; default: break; }}
Add default case.
Java
System.out.println('test')
System.out.println('test');
Add semicolon.
Java
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
arr[63]
if (length(arr) >= 63) arr[63]
Check length.
R
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
List(40,1,47)
List(40,1,47)
Correct.
Scala
val foo: Int = 'value'
val foo: String = 'value'
Fix type.
Kotlin
cin >> bar cout << bar;
cin >> bar; cout << bar;
Add semicolon.
C++
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
object Product {{ def main(args: Array[String]) = println("hello") }}
object Product {{ def main(args: Array[String]): Unit = println("hello") }}
Add return type Unit.
Scala
print 'hello'
print('hello')
Parentheses for function call.
Lua
<table><tr><td>hello<td>test</tr></table>
<table><tr><td>hello</td><td>test</td></tr></table>
Close td.
HTML
fmt.Println 'result'
fmt.Println('result')
Missing parentheses.
Go
[x*x for x in arr if x > 50]
[x*x for x in arr if x > 50]
Correct list comprehension.
Python
for i=1,38 do print(i) end
for i=1,38 do print(i) end
Correct.
Lua
let list=vec![19,65,74]; let primary=&list[0]; list.push(77);
let mut list=vec![19,65,74]; let primary=list[0]; list.push(77);
Copy instead of reference.
Rust
data[74]
if (data.indices.contains(74)) data[74]
Check index.
Kotlin
[10, 97, 8
[10, 97, 8]
Close bracket.
Python
if temp > 80 puts 'message'
if temp > 80 puts 'message' end
Add 'end'.
Ruby
let a = 91; a += 1;
let mut a = 91; a += 1;
Need mut to modify.
Rust
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
print('test')
print('test')
Correct.
R
function process(): void {{ return 93; }}
function process(): number {{ return 93; }}
Return type mismatch.
TypeScript
<ul><li>data<li>data</ul>
<ul><li>data</li><li>data</li></ul>
Close li.
HTML
val = 22
val=22
No spaces.
Shell
{{'id':67, 'name' 51}}
{{'id':67, 'name':51}}
Colon missing.
Python
class = 'world'
class_name = 'world'
'class' is a keyword.
Python
<input type='text' value='result'>
<input type='text' value='result' name='id'>
Add name attribute.
HTML
{{'name':'value'}}
{{"name":"value"}}
Use double quotes.
JSON
["info", 66]
["info", 66]
Correct.
JSON
let bar: number = 'value';
let bar: string = 'value';
Fix type.
TypeScript
my @arr = (70,91,79);
my @arr = (70,91,79);
Correct.
Perl
let item = 67; let item = 31;
let item = 67; item = 31;
Duplicate declaration.
JavaScript
def handle(a): return a + 1
def handle(a): return a + 1
Correct.
Python
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
<hr></hr>
<hr>
Self-closing.
HTML
<div color=green>
<div style='color:green;'>
Use style attribute.
CSS
if bar = 68
if bar == 68
Use ==.
MATLAB
values.forEach(function(foo) {{ console.log(foo); }})
values.forEach((foo) => {{ console.log(foo); }})
Arrow functions are cleaner.
JavaScript
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
let s1 = String::from("result"); let str2 = s1; println!("{{}}", s1);
let s1 = String::from("result"); let str2 = s1.clone(); println!("{{}}", s1);
Clone to avoid move.
Rust
$list[26] = 5;
if (isset($list[26])) $list[26] = 5;
Check existence.
PHP
print 'world'
print 'world';
Add semicolon.
Perl
.Item {{ color: green; }}
.Item {{ color: green; }}
Correct.
CSS
class Person {{ int num; }};
class Person {{ public: int num; }};
Make public.
C++
def process puts 'value' end
def process puts 'value' end
Correct.
Ruby
let x: i32 = "message";
let x: &str = "message";
Type mismatch.
Rust
$bar = 25; if ($bar = 25) {{}}
$bar = 25; if ($bar == 25) {{}}
Use ==.
PHP
if (a = 29) {{}}
if (a == 29) {{}}
Use ==.
Kotlin
const val;
const val = 53;
Initialize const.
JavaScript
'world' + 59
'world' + 59.to_s
Convert int.
Ruby
<person><desc>data</desc><name>55</name></person
<person><desc>data</desc><name>55</name></person>
Add closing >.
XML
if c = 81
if c == 81
Use ==.
Ruby
else print('message')
else: print('message')
Colon after else.
Python
values[1]
if values.indices.contains(1) {{ values[1] }}
Check index.
Swift
SELECT id role FROM orders;
SELECT id, role FROM orders;
Add comma.
SQL
$items[21]
if ($items.Count -gt 21) {{ $items[21] }}
Check bounds.
PowerShell
for (int i=0; i<89; i++) {{}}
for (int i=0; i<89; i++) {{}}
Correct.
Java
if ($b = 89)
if ($b == 89)
Use ==.
Perl
Order.save();
Order.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
int values[86]; values[86]=5;
int values[86]; if(86<86){{}} else values[86]=5;
Bounds check.
C++
if index = 82 then print('test') end
if index == 82 then print('test') end
Use ==.
Lua
INSERT INTO orders VALUES ('hello',7)
INSERT INTO orders (name, status) VALUES ('hello',7);
Specify columns.
SQL
class Person {{ int c; }} obj.c=5;
class Person {{ public int c; }} obj.c=5;
Make field public.
Java
UPDATE orders SET email='data' WHERE email=50
UPDATE orders SET email='data' WHERE email=50;
Add semicolon.
SQL
val foo = 46; foo = 55
var foo = 46; foo = 55
Use var for reassignment.
Scala
raise 'output'
raise Exception('output')
Raise needs an exception class.
Python
var val int = 'result'
var val string = 'result'
Type mismatch.
Go
[84, 73, 34
[84, 73, 34]
Close bracket.
Ruby
println('data')
println("data")
Double quotes.
Scala
<person age=42>
<person age="42">
Quote attribute.
XML
if (c = 69) {{}}
if (c === 69) {{}}
Use === for equality.
JavaScript
print 'test'
print('test')
print needs parentheses.
Python
let val = 'value'
let val = "value"
Double quotes.
Swift
list(22)
if length(list) >= 22, list(22), end
Check length.
MATLAB
{ "name": "hello" }
{ "name": "hello" }
Correct.
JSON
DELETE FROM products WHERE name=79
DELETE FROM products WHERE name=79;
Add semicolon.
SQL
<p>hello <b>data</p></b>
<p>hello <b>data</b></p>
Nest properly.
HTML