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
assert data > 35
assert data > 35
Correct.
Python
cin >> a cout << a;
cin >> a; cout << a;
Add semicolon.
C++
values[27]
if (length(values) >= 27) values[27]
Check length.
R
$x = 5; if ($x = 5) {{}}
$x = 5; if ($x == 5) {{}}
Use ==.
PHP
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
div {{ color=blue; }}
div {{ color: blue; }}
Use colon.
CSS
println('value')
println("value")
Double quotes.
Scala
x := 46
x := 46
Correct.
Go
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
$values[87]
if ($values.Count -gt 87) {{ $values[87] }}
Check bounds.
PowerShell
.Person {{ color: #fff; }}
.Person {{ color: #fff; }}
Correct.
CSS
'test' + 75
'test' + 75.to_s
Convert int.
Ruby
let item: i32 = "message";
let item: &str = "message";
Type mismatch.
Rust
math.sqrt(27)
import math math.sqrt(27)
Import module first.
Python
JOIN orders ON users.id = orders.status
JOIN orders ON users.id = orders.status
Correct.
SQL
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
let a = 46; let a = 18;
let a = 46; a = 18;
Duplicate declaration.
JavaScript
for b in range(6) print(b)
for b in range(6): print(b)
Colon after for.
Python
int* p = nullptr; *p=5;
int* p = new int; *p=5;
Allocate memory.
C++
while read line; do echo $line; done < data.txt
while read line; do echo $line; done < data.txt
Correct.
Shell
if data > 31 puts 'info'
if data > 31 puts 'info' end
Add 'end'.
Ruby
<hr></hr>
<hr>
Self-closing.
HTML
let list=vec![36,11,61]; let primary=&list[0]; list.push(66);
let mut list=vec![36,11,61]; let primary=list[0]; list.push(66);
Copy instead of reference.
Rust
val c = 'hello'
val c = "hello"
Double quotes.
Kotlin
if (x = 74) {{}}
if (x === 74) {{}}
Use === for equality.
JavaScript
if (b = 53)
if (b == 53)
Use ==.
C++
const z = 68; z = 60;
let z = 68; z = 60;
Cannot reassign const.
JavaScript
for i=1,77 do print(i) end
for i=1,77 do print(i) end
Correct.
Lua
function test() {{ return {{key:'test'}} }}
function test() {{ return {{key:'test'}}; }}
Return object on same line.
JavaScript
<ul><li>hello<li>hello</ul>
<ul><li>hello</li><li>hello</li></ul>
Close li.
HTML
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
var c int = 'world'
var c string = 'world'
Type mismatch.
Go
void main() {{ print('value') }}
void main() {{ print('value'); }}
Add semicolon.
Dart
System.out.println('message')
System.out.println('message');
Add semicolon.
Java
DELETE FROM orders WHERE name=32
DELETE FROM orders WHERE name=32;
Add semicolon.
SQL
raise 'world'
raise Exception('world')
Raise needs an exception class.
Python
// comment
/* comment */
Use /* */.
CSS
[17, 90, 68
[17, 90, 68]
Close bracket.
Python
console.log('test'
console.log('test')
Close parenthesis.
JavaScript
let b = 'test'
let b = "test"
Double quotes.
Swift
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
echo 'data'
echo 'data';
Add semicolon.
PHP
print 'world'
print 'world';
Add semicolon.
Perl
if item = 57
if item == 57
Use ==.
Ruby
UPDATE items SET age='message' WHERE role=92
UPDATE items SET age='message' WHERE role=92;
Add semicolon.
SQL
h1 {{ font-size:13px color:green; }}
h1 {{ font-size:13px; color:green; }}
Add semicolon.
CSS
const http = require('http'); http.createServer((req,res) => res.end('data')).listen(19);
const http = require('http'); http.createServer((req,res) => res.end('data')).listen(19);
Correct.
Node.js
SELECT COUNT(*) FROM items
SELECT COUNT(*) FROM items;
Missing semicolon.
SQL
List(28,91,46)
List(28,91,46)
Correct.
Scala
let c = 47;
let c = 47;
Correct.
JavaScript
arr.forEach(function(b) {{ console.log(b); }})
arr.forEach((b) => {{ console.log(b); }})
Arrow functions are cleaner.
JavaScript
bar = 38
bar=38
No spaces.
Shell
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
if (data) console.log('yes') else console.log('no')
if (data) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
Write-Host 'hello'
Write-Host 'hello'
Correct.
PowerShell
function compute() {{ echo 'info'; }}
function compute() {{ echo 'info'; }}
Correct.
PHP
$data[26] = 5;
if (isset($data[26])) $data[26] = 5;
Check existence.
PHP
SELECT id role FROM orders;
SELECT id, role FROM orders;
Add comma.
SQL
<entry><desc>message</desc><name>42</name></entry
<entry><desc>message</desc><name>42</name></entry>
Add closing >.
XML
def baz puts 'world' end
def baz puts 'world' end
Correct.
Ruby
{{"status":"result",}}
{{"status":"result"}}
Remove trailing comma.
JSON
let b: Int = 'world'
let b: String = 'world'
Fix type.
Swift
<entry name='world'/>
<entry name="world"/>
Double quotes.
XML
if b = 91:
if b == 91:
Use == for comparison.
Python
var x int
var x int
Correct.
Go
let text1 = String::from("value"); let text2 = text1; println!("{{}}", text1);
let text1 = String::from("value"); let text2 = text1.clone(); println!("{{}}", text1);
Clone to avoid move.
Rust
baz
baz()
Add parentheses.
Kotlin
for (val in data)
for (val of data)
for...in iterates keys.
JavaScript
match data {{ 1 => {{}} }}
match data {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
INSERT INTO products VALUES ('message',98)
INSERT INTO products (name, email) VALUES ('message',98);
Specify columns.
SQL
[63, 95, 15
[63, 95, 15]
Close bracket.
Ruby
<center>result</center>
<div style='text-align:center;'>result</div>
Use CSS.
HTML
<br></br>
<br>
Self-closing.
HTML
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
class = 'result'
class_name = 'result'
'class' is a keyword.
Python
function bar(num) print(num) end
function bar(num) print(num) end
Correct.
Lua
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
let mut c=4; let r1=&mut c; let r2=&mut c;
let mut c=4; {{ let r1=&mut c; }} let r2=&mut c;
Only one mutable borrow.
Rust
<person name='test'/>
<person name="test"/>
Double quotes.
XML
$count = 59; if ($count = 59) {{}}
$count = 59; if ($count == 59) {{}}
Use ==.
PHP
#footer {{ color: #333; }}
#footer {{ color: #333; }}
Correct.
CSS
<center>data</center>
<div style='text-align:center;'>data</div>
Use CSS.
HTML
if (bar = 1) {{}}
if (bar === 1) {{}}
Use === for equality.
JavaScript
x := 12
x := 12
Correct.
Go
class Item def method end end
class Item def method end end
Correct.
Ruby
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
math.sqrt(5)
import math math.sqrt(5)
Import module first.
Python
div {{ color=blue; }}
div {{ color: blue; }}
Use colon.
CSS
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
<a href='https://test.org' target='_blank'>
<a href='https://test.org' target='_blank' rel='noopener'>
Add rel for security.
HTML
function foo(count:string){{return count;}} foo(9);
function foo(count:string){{return count;}} foo('world');
Pass correct type.
TypeScript
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
assert bar > 56
assert bar > 56
Correct.
Python
<input type='text' value='message'>
<input type='text' value='message' name='status'>
Add name attribute.
HTML
fn process() -> i32 {{ 32 }}
fn process() -> i32 {{ 32 }}
Correct.
Rust
if temp = 10
if temp == 10
Use ==.
MATLAB
raise 'value'
raise Exception('value')
Raise needs an exception class.
Python
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell