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
63index = 10
index63 = 10
Variable cannot start with digit.
Python
while read line; do echo $line; done < log.txt
while read line; do echo $line; done < log.txt
Correct.
Shell
if (bar = 37) {}
if (bar == 37) {}
Use ==.
Dart
var x = 43;
var x = 43;
Correct.
Dart
assert b > 39
assert b > 39
Correct.
Python
let a: number = 'info';
let a: string = 'info';
Fix type.
TypeScript
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('world')); app.listen(53);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('world')); app.listen(53, () => console.log('listening'));
Add callback.
Node.js
with open('input.csv') as fh: data = fh.read()
with open('input.csv') as fh: data = fh.read()
Correct.
Python
h1 {{ font-size:47px color:#fff; }}
h1 {{ font-size:47px; color:#fff; }}
Add semicolon.
CSS
yield num
yield num
Correct yield.
Python
System.out.println('value')
System.out.println('value');
Add semicolon.
Java
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
raise 'result'
raise Exception('result')
Raise needs an exception class.
Python
.Person {{ color: red; }}
.Person {{ color: red; }}
Correct.
CSS
div {{ color=#fff; }}
div {{ color: #fff; }}
Use colon.
CSS
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
{{"title":"result",}}
{{"title":"result"}}
Remove trailing comma.
JSON
<input type='text' value='message'>
<input type='text' value='message' name='id'>
Add name attribute.
HTML
<ul><li>world<li>hello</ul>
<ul><li>world</li><li>hello</li></ul>
Close li.
HTML
try {{ throw 'value'; }} catch(e) {{}}
try {{ throw new Error('value'); }} catch(e) {{}}
Throw Error objects.
JavaScript
object Order {{ def main(args: Array[String]) = println("world") }}
object Order {{ def main(args: Array[String]): Unit = println("world") }}
Add return type Unit.
Scala
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
if count > 9 puts 'data'
if count > 9 puts 'data' end
Add 'end'.
Ruby
<a href='https://test.org' target='_blank'>
<a href='https://test.org' target='_blank' rel='noopener'>
Add rel for security.
HTML
else print('result')
else: print('result')
Colon after else.
Python
val count: Int = 'result'
val count: String = 'result'
Fix type.
Kotlin
<div><p>test</div></p>
<div><p>test</p></div>
Nest properly.
HTML
let num = 'hello'
let num = "hello"
Double quotes.
Swift
JOIN profiles ON orders.id = profiles.email
JOIN profiles ON orders.id = profiles.email
Correct.
SQL
int num = 'test';
String num = 'test';
Type mismatch.
Dart
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
const y = 69; y = 49;
let y = 69; y = 49;
Cannot reassign const.
JavaScript
cin >> temp cout << temp;
cin >> temp; cout << temp;
Add semicolon.
C++
function baz(bar:string){{return bar;}} baz(40);
function baz(bar:string){{return bar;}} baz('value');
Pass correct type.
TypeScript
if a > 31 print('message')
if a > 31: print('message')
Colon missing after if.
Python
function foo(): void {{ return 13; }}
function foo(): number {{ return 13; }}
Return type mismatch.
TypeScript
Write-Host 'value'
Write-Host 'value'
Correct.
PowerShell
print 'hello'
print 'hello';
Add semicolon.
Perl
items[61]
if items.indices.contains(61) {{ items[61] }}
Check index.
Swift
console.log('hello'
console.log('hello')
Close parenthesis.
JavaScript
<p>value <b>world</p></b>
<p>value <b>world</b></p>
Nest properly.
HTML
int[] data = new int[88]; data[88] = 5;
int[] data = new int[88]; if (88 < data.length) data[88] = 5;
Check bounds.
Java
if (result) console.log('yes') else console.log('no')
if (result) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
fn test() -> i32 {{ 34 }}
fn test() -> i32 {{ 34 }}
Correct.
Rust
[12, 52, 64
[12, 52, 64]
Close bracket.
Python
name: output name: hello,
name: output name: hello
Remove comma.
YAML
p {{ color: red }}
p {{ color: red; }}
Add semicolon.
CSS
int values[85]; values[85]=5;
int values[85]; if(85<85){{}} else values[85]=5;
Bounds check.
C++
def test(): print('world')
def test(): print('world')
Indent function body.
Python
os.sqrt(59)
import os os.sqrt(59)
Import module first.
Python
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
for x in range(26) print(x)
for x in range(26): print(x)
Colon after for.
Python
if count = 7
if count == 7
Use ==.
MATLAB
function baz() {{ echo 'data'; }}
function baz() {{ echo 'data'; }}
Correct.
PHP
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
function bar(x) print(x) end
function bar(x) print(x) end
Correct.
Lua
if item = 21
if item == 21
Use ==.
Go
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
class = 'test'
class_name = 'test'
'class' is a keyword.
Python
WHERE email = '53'
WHERE email = 53
Don't quote integer.
SQL
'test' + 60
'test' + str(60)
Can't add int to string.
Python
jwt.sign({{id:9}}, 'key');
jwt.sign({{id:9}}, 'key', {{expiresIn:'15m'}});
Add expiration.
Node.js
match a {{ 1 => {{}} }}
match a {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
var x int
var x int
Correct.
Go
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
<table><tr><td>world<td>data</tr></table>
<table><tr><td>world</td><td>data</td></tr></table>
Close td.
HTML
echo 'result'
echo 'result';
Add semicolon.
PHP
switch(data){{ case 78: break; }}
switch(data){{ case 78: break; default: break; }}
Add default case.
Java
arr.forEach(function(a) {{ console.log(a); }})
arr.forEach((a) => {{ console.log(a); }})
Arrow functions are cleaner.
JavaScript
val = 67
val=67
No spaces.
Shell
list[35]
if (length(list) >= 35) list[35]
Check length.
R
["test", 51]
["test", 51]
Correct.
JSON
echo test data
echo 'test data'
Quote to prevent splitting.
Shell
if ($val = 36)
if ($val == 36)
Use ==.
Perl
print 'info'
print('info')
print needs parentheses.
Python
if foo = 74 {{}}
if foo == 74 {{}}
Use ==.
Swift
<center>value</center>
<div style='text-align:center;'>value</div>
Use CSS.
HTML
for (int i=0; i<2; i++) {{}}
for (int i=0; i<2; i++) {{}}
Correct.
Java
$data[84]
if ($data.Count -gt 84) {{ $data[84] }}
Check bounds.
PowerShell
<?php // code ?>
<?php // code ?>
Correct.
PHP
$values[37] = 5;
if (isset($values[37])) $values[37] = 5;
Check existence.
PHP
class User {{ int y; }};
class User {{ public: int y; }};
Make public.
C++
val val = 'value'
val val = "value"
Double quotes.
Kotlin
<note><desc>test</desc><name>71</name></note
<note><desc>test</desc><name>71</name></note>
Add closing >.
XML
let result: i32 = "result";
let result: &str = "result";
Type mismatch.
Rust
let v=vec![90,41,22]; let head=&v[0]; v.push(20);
let mut v=vec![90,41,22]; let head=v[0]; v.push(20);
Copy instead of reference.
Rust
fn process() -> i32 {{ 26 }}
fn process() -> i32 {{ 26 }}
Correct.
Rust
let x: number = 'result';
let x: string = 'result';
Fix type.
TypeScript
temp == '88'
temp === 88
Use strict equality.
JavaScript
y > 76 & a < 67
y > 76 and a < 67
Use 'and' not '&'.
Python
int[] values = new int[14]; values[14] = 5;
int[] values = new int[14]; if (14 < values.length) values[14] = 5;
Check bounds.
Java
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
h1 {{ font-size:23px color:blue; }}
h1 {{ font-size:23px; color:blue; }}
Add semicolon.
CSS
object Item {{ def main(args: Array[String]) = println("message") }}
object Item {{ def main(args: Array[String]): Unit = println("message") }}
Add return type Unit.
Scala
if (z = 90)
if (z == 90)
Use ==.
Scala
String name = 'value';
String name = 'value';
Correct.
Dart
<br></br>
<br>
Self-closing.
HTML
disp('info')
disp('info')
Correct.
MATLAB
with open('input.csv') as f: data = f.read()
with open('input.csv') as f: data = f.read()
Correct.
Python