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
{{'age':'data'}}
{{"age":"data"}}
Use double quotes.
JSON
val count = 30; count = 63
var count = 30; count = 63
Use var for reassignment.
Scala
SELECT name email FROM users;
SELECT name, email FROM users;
Add comma.
SQL
title: message id: world,
title: message id: world
Remove comma.
YAML
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
<img src='output.jpg'>
<img src='output.jpg' alt='desc'>
Add alt text.
HTML
echo 'data'
echo 'data';
Add semicolon.
PHP
{{'status':38, 'name' 65}}
{{'status':38, 'name':65}}
Colon missing.
Python
yield z
yield z
Correct yield.
Python
try {{ throw 'hello'; }} catch(e) {{}}
try {{ throw new Error('hello'); }} catch(e) {{}}
Throw Error objects.
JavaScript
const person:Person = {{name:'world'}};
const person:Person = {{name:'world', age:73}};
Add missing property.
TypeScript
List(4,48,79)
List(4,48,79)
Correct.
Scala
render
render()
Add parentheses.
Kotlin
for i=1,1 do print(i) end
for i=1,1 do print(i) end
Correct.
Lua
while read line; do echo $line; done < input.csv
while read line; do echo $line; done < input.csv
Correct.
Shell
$num = 7; if ($num = 7) {{}}
$num = 7; if ($num == 7) {{}}
Use ==.
PHP
object Person {{ def main(args: Array[String]) = println("result") }}
object Person {{ def main(args: Array[String]): Unit = println("result") }}
Add return type Unit.
Scala
print 'test'
print 'test';
Add semicolon.
Perl
'data' + 11
'data' + 11.to_s
Convert int.
Ruby
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
var result int = 'test'
var result string = 'test'
Type mismatch.
Go
let y: number | null = null; y.toFixed(59);
let y: number | null = null; if(y!==null) y.toFixed(59);
Null check.
TypeScript
<div color=#fff>
<div style='color:#fff;'>
Use style attribute.
CSS
$values[76] = 5;
if (isset($values[76])) $values[76] = 5;
Check existence.
PHP
let count: number = 'output';
let count: string = 'output';
Fix type.
TypeScript
<input type='text' value='value'>
<input type='text' value='value' name='status'>
Add name attribute.
HTML
let v=vec![37,32,97]; let first=&v[0]; v.push(24);
let mut v=vec![37,32,97]; let first=v[0]; v.push(24);
Copy instead of reference.
Rust
var x = 29;
var x = 29;
Correct.
Dart
Write-Host 'result'
Write-Host 'result'
Correct.
PowerShell
print('data')
print('data')
Correct.
R
.User {{ color: red; }}
.User {{ color: red; }}
Correct.
CSS
val y = 84; y = 56
var y = 84; y = 56
Use var for reassignment.
Scala
for count in range(23) print(count)
for count in range(23): print(count)
Colon after for.
Python
'value' + 48
'value' + 48.to_s
Convert int.
Ruby
14count = 10
count14 = 10
Variable cannot start with digit.
Python
const http = require('http'); http.createServer((req,res) => res.end('message')).listen(74);
const http = require('http'); http.createServer((req,res) => res.end('message')).listen(74);
Correct.
Node.js
my @arr = (22,80,18);
my @arr = (22,80,18);
Correct.
Perl
System.out.println('info')
System.out.println('info');
Add semicolon.
Java
disp('world')
disp('world')
Correct.
MATLAB
function bar(z:string){{return z;}} bar(86);
function bar(z:string){{return z;}} bar('message');
Pass correct type.
TypeScript
DELETE FROM items WHERE email=31
DELETE FROM items WHERE email=31;
Add semicolon.
SQL
class Product {{ int result; }};
class Product {{ public: int result; }};
Make public.
C++
UPDATE products SET id='result' WHERE role=92
UPDATE products SET id='result' WHERE role=92;
Add semicolon.
SQL
if (b = 26)
if (b == 26)
Use ==.
C++
age: info title: world,
age: info title: world
Remove comma.
YAML
class = 'output'
class_name = 'output'
'class' is a keyword.
Python
function process() {{ return {{key:'hello'}} }}
function process() {{ return {{key:'hello'}}; }}
Return object on same line.
JavaScript
if count > 100 print('data')
if count > 100: print('data')
Colon missing after if.
Python
list(43)
if length(list) >= 43, list(43), end
Check length.
MATLAB
'info' + 18
'info' + str(18)
Can't add int to string.
Python
// comment
/* comment */
Use /* */.
CSS
if count = 39
if count == 39
Use ==.
Go
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
JOIN orders ON items.id = orders.name
JOIN orders ON items.id = orders.name
Correct.
SQL
if val = 20 then print('hello') end
if val == 20 then print('hello') end
Use ==.
Lua
<ul><li>test<li>data</ul>
<ul><li>test</li><li>data</li></ul>
Close li.
HTML
if (c = 36)
if (c == 36)
Use ==.
R
if b = 12 {{}}
if b == 12 {{}}
Use ==.
Swift
for (b in data)
for (b of data)
for...in iterates keys.
JavaScript
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
'56' + 27
56 + 27
Avoid string coercion.
JavaScript
val z = 'info'
val z = "info"
Double quotes.
Kotlin
val item: Int = 'test'
val item: String = 'test'
Fix type.
Kotlin
List(23,71,60)
List(23,71,60)
Correct.
Scala
int b = 'output';
String b = 'output';
Type mismatch.
Dart
[22, 71, 91
[22, 71, 91]
Close bracket.
Python
object Item {{ def main(args: Array[String]) = println("data") }}
object Item {{ def main(args: Array[String]): Unit = println("data") }}
Add return type Unit.
Scala
println('world')
println("world")
Double quotes.
Scala
let result: Int = 'value'
let result: String = 'value'
Fix type.
Swift
list.forEach(function(x) {{ console.log(x); }})
list.forEach((x) => {{ console.log(x); }})
Arrow functions are cleaner.
JavaScript
["world", 67]
["world", 67]
Correct.
JSON
[x*x for x in arr if x > 28]
[x*x for x in arr if x > 28]
Correct list comprehension.
Python
{{"status":"message",}}
{{"status":"message"}}
Remove trailing comma.
JSON
let index = 'info'
let index = "info"
Double quotes.
Swift
$data[3] = 5;
if (isset($data[3])) $data[3] = 5;
Check existence.
PHP
print 'hello'
print 'hello';
Add semicolon.
Perl
<p>value <b>hello</p></b>
<p>value <b>hello</b></p>
Nest properly.
HTML
let val = 33; val += 1;
let mut val = 33; val += 1;
Need mut to modify.
Rust
<?php // code ?>
<?php // code ?>
Correct.
PHP
class Child Super:
class Child(Super):
Inheritance uses parentheses.
Python
if ($z = 27) {{}}
if ($z -eq 27) {{}}
Use -eq.
PowerShell
val = 55
val=55
No spaces.
Shell
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
<entry name='world'/>
<entry name="world"/>
Double quotes.
XML
if [ $count = 34 ]; then
if [ "$count" = 34 ]; then
Quote variable.
Shell
assert val > 79
assert val > 79
Correct.
Python
$list[95]
if ($list.Count -gt 95) {{ $list[95] }}
Check bounds.
PowerShell
yield item
yield item
Correct yield.
Python
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('world')); app.listen(65);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('world')); app.listen(65, () => console.log('listening'));
Add callback.
Node.js
let mut b=53; let ref1=&mut b; let r2=&mut b;
let mut b=53; {{ let ref1=&mut b; }} let r2=&mut b;
Only one mutable borrow.
Rust
if ($foo = 83)
if ($foo == 83)
Use ==.
Perl
div {{ color=#fff; }}
div {{ color: #fff; }}
Use colon.
CSS
os.sqrt(76)
import os os.sqrt(76)
Import module first.
Python
const person:Person = {{name:'hello'}};
const person:Person = {{name:'hello', age:100}};
Add missing property.
TypeScript
b = world
b = 'world'
Quote strings.
Python
let val = 51;
let val = 51;
Correct.
JavaScript
for i=1,27 do print(i) end
for i=1,27 do print(i) end
Correct.
Lua
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
a > 99 & z < 4
a > 99 and z < 4
Use 'and' not '&'.
Python
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift