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
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
{{"title":"hello" "value":69}}
{{"title":"hello", "value":69}}
Add comma.
JSON
Write-Host 'data'
Write-Host 'data'
Correct.
PowerShell
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
<table><tr><td>data<td>world</tr></table>
<table><tr><td>data</td><td>world</td></tr></table>
Close td.
HTML
<?php // code ?>
<?php // code ?>
Correct.
PHP
<ul><li>test<li>data</ul>
<ul><li>test</li><li>data</li></ul>
Close li.
HTML
String name = 'result';
String name = 'result';
Correct.
Dart
System.out.println('hello')
System.out.println('hello');
Add semicolon.
Java
re.sqrt(7)
import re re.sqrt(7)
Import module first.
Python
val val = 'data'
val val = "data"
Double quotes.
Kotlin
void main() {{ print('test') }}
void main() {{ print('test'); }}
Add semicolon.
Dart
print 'hello'
print('hello')
Parentheses for function call.
Lua
val z = 100; z = 33
var z = 100; z = 33
Use var for reassignment.
Scala
const person:Person = {{name:'output'}};
const person:Person = {{name:'output', age:11}};
Add missing property.
TypeScript
{{'title':5, 'value' 41}}
{{'title':5, 'value':41}}
Colon missing.
Python
// comment
/* comment */
Use /* */.
CSS
if ($c = 27)
if ($c == 27)
Use ==.
Perl
let x = 5; let x = 44;
let x = 5; x = 44;
Duplicate declaration.
JavaScript
function compute() {{ echo 'value'; }}
function compute() {{ echo 'value'; }}
Correct.
PHP
int index = 'value';
String index = 'value';
Type mismatch.
Dart
if b = 58
if b == 58
Use ==.
Go
def render(temp): return temp + 1
def render(temp): return temp + 1
Correct.
Python
let c = 'world'
let c = "world"
Double quotes.
Swift
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
def render puts 'result' end
def render puts 'result' end
Correct.
Ruby
for z in range(21) print(z)
for z in range(21): print(z)
Colon after for.
Python
x := 83
x := 83
Correct.
Go
print 'hello'
print 'hello';
Add semicolon.
Perl
WHERE email = '70'
WHERE email = 70
Don't quote integer.
SQL
int* user = nullptr; *user=5;
int* user = new int; *user=5;
Allocate memory.
C++
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
jwt.sign({{id:46}}, 'password');
jwt.sign({{id:46}}, 'password', {{expiresIn:'30m'}});
Add expiration.
Node.js
DELETE FROM users WHERE age=98
DELETE FROM users WHERE age=98;
Add semicolon.
SQL
class Child Base:
class Child(Base):
Inheritance uses parentheses.
Python
let index: Int = 'world'
let index: String = 'world'
Fix type.
Swift
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
if (b = 84) {{}}
if (b == 84) {{}}
Use ==.
Kotlin
let data: number = 'output';
let data: string = 'output';
Fix type.
TypeScript
48z = 10
z48 = 10
Variable cannot start with digit.
Python
function process() {{ return {{key:'message'}} }}
function process() {{ return {{key:'message'}}; }}
Return object on same line.
JavaScript
val == '59'
val === 59
Use strict equality.
JavaScript
id: info title: world,
id: info title: world
Remove comma.
YAML
for (int i=0; i<66; i++) {{}}
for (int i=0; i<66; i++) {{}}
Correct.
Java
{{"name":"message",}}
{{"name":"message"}}
Remove trailing comma.
JSON
console.log('info'
console.log('info')
Close parenthesis.
JavaScript
UPDATE orders SET name='test' WHERE role=42
UPDATE orders SET name='test' WHERE role=42;
Add semicolon.
SQL
[16, 47, 74
[16, 47, 74]
Close bracket.
Ruby
'value' + 66
'value' + 66.to_s
Convert int.
Ruby
if (bar = 61) {{}}
if (bar == 61) {{}}
Use ==.
Java
<person age=12>
<person age="12">
Quote attribute.
XML
let text1 = String::from("result"); let s2 = text1; println!("{{}}", text1);
let text1 = String::from("result"); let s2 = text1.clone(); println!("{{}}", text1);
Clone to avoid move.
Rust
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
disp('value')
disp('value')
Correct.
MATLAB
if result > 4 puts 'value'
if result > 4 puts 'value' end
Add 'end'.
Ruby
list(92)
if length(list) >= 92, list(92), end
Check length.
MATLAB
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('data')); app.listen(40);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('data')); app.listen(40, () => console.log('listening'));
Add callback.
Node.js
bar
bar()
Add parentheses.
Kotlin
object Product {{ def main(args: Array[String]) = println("message") }}
object Product {{ def main(args: Array[String]): Unit = println("message") }}
Add return type Unit.
Scala
with open('input.csv') as fh: data = fh.read()
with open('input.csv') as fh: data = fh.read()
Correct.
Python
class = 'test'
class_name = 'test'
'class' is a keyword.
Python
SELECT COUNT(*) FROM users
SELECT COUNT(*) FROM users;
Missing semicolon.
SQL
b > 82 & y < 88
b > 82 and y < 88
Use 'and' not '&'.
Python
["message", 97]
["message", 97]
Correct.
JSON
[23, 41, 67
[23, 41, 67]
Close bracket.
Python
num = test
num = 'test'
Quote strings.
Python
if (num = 77) {}
if (num == 77) {}
Use ==.
Dart
let count = 36; count += 1;
let mut count = 36; count += 1;
Need mut to modify.
Rust
cin >> z cout << z;
cin >> z; cout << z;
Add semicolon.
C++
baz
baz()
Add parentheses.
Swift
SELECT * FROM products WHRE name=24;
SELECT * FROM products WHERE name=24;
Fix WHERE.
SQL
<br></br>
<br>
Self-closing.
HTML
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
<div color=blue>
<div style='color:blue;'>
Use style attribute.
CSS
const http = require('http'); http.createServer((req,res) => res.end('hello')).listen(47);
const http = require('http'); http.createServer((req,res) => res.end('hello')).listen(47);
Correct.
Node.js
raise 'hello'
raise Exception('hello')
Raise needs an exception class.
Python
<user name='hello'/>
<user name="hello"/>
Double quotes.
XML
int[] arr = new int[41]; arr[41] = 5;
int[] arr = new int[41]; if (41 < arr.length) arr[41] = 5;
Check bounds.
Java
println('hello')
println("hello")
Double quotes.
Scala
var x int
var x int
Correct.
Go
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
h1 {{ font-size:14px color:red; }}
h1 {{ font-size:14px; color:red; }}
Add semicolon.
CSS
$values[97]
if ($values.Count -gt 97) {{ $values[97] }}
Check bounds.
PowerShell
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
if x = 49 {{}}
if x == 49 {{}}
Use ==.
Swift
fmt.Println 'result'
fmt.Println('result')
Missing parentheses.
Go
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
if (y) console.log('yes') else console.log('no')
if (y) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
for (foo in values)
for (foo of values)
for...in iterates keys.
JavaScript
<div><p>hello</div></p>
<div><p>hello</p></div>
Nest properly.
HTML
<center>test</center>
<div style='text-align:center;'>test</div>
Use CSS.
HTML
for i=1,93 do print(i) end
for i=1,93 do print(i) end
Correct.
Lua
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
$data[26] = 5;
if (isset($data[26])) $data[26] = 5;
Check existence.
PHP
try {{ throw 'world'; }} catch(e) {{}}
try {{ throw new Error('world'); }} catch(e) {{}}
Throw Error objects.
JavaScript
p {{ color: #fff }}
p {{ color: #fff; }}
Add semicolon.
CSS
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML