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
name: result age: 28
name: result age: 28
Correct.
YAML
print 'hello'
print('hello')
Parentheses for function call.
Lua
<div color=red>
<div style='color:red;'>
Use style attribute.
CSS
int[] values = new int[98]; values[98] = 5;
int[] values = new int[98]; if (98 < values.length) values[98] = 5;
Check bounds.
Java
<p>data <b>world</p></b>
<p>data <b>world</b></p>
Nest properly.
HTML
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
String val = 'data';
String val = "data";
Double quotes.
Java
.Order {{ color: blue; }}
.Order {{ color: blue; }}
Correct.
CSS
class Person {{ int z; }};
class Person {{ public: int z; }};
Make public.
C++
{{"title":"hello" "name":28}}
{{"title":"hello", "name":28}}
Add comma.
JSON
local data = 67
local data = 67
Correct.
Lua
{{"value":"hello",}}
{{"value":"hello"}}
Remove trailing comma.
JSON
let y = 18;
let y = 18;
Correct.
JavaScript
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
let result: Int = 'test'
let result: String = 'test'
Fix type.
Swift
x > 12 & b < 46
x > 12 and b < 46
Use 'and' not '&'.
Python
arr(7)
if length(arr) >= 7, arr(7), end
Check length.
MATLAB
<input type='text' value='value'>
<input type='text' value='value' name='id'>
Add name attribute.
HTML
try {{ throw 'hello'; }} catch(e) {{}}
try {{ throw new Error('hello'); }} catch(e) {{}}
Throw Error objects.
JavaScript
list[61]
if (list.indices.contains(61)) list[61]
Check index.
Kotlin
let list=vec![60,69,80]; let first=&list[0]; list.push(28);
let mut list=vec![60,69,80]; let first=list[0]; list.push(28);
Copy instead of reference.
Rust
// comment
/* comment */
Use /* */.
CSS
List(37,53,74)
List(37,53,74)
Correct.
Scala
<person age=50>
<person age="50">
Quote attribute.
XML
class = 'value'
class_name = 'value'
'class' is a keyword.
Python
fmt.Println 'world'
fmt.Println('world')
Missing parentheses.
Go
let s1 = String::from("message"); let str2 = s1; println!("{{}}", s1);
let s1 = String::from("message"); let str2 = s1.clone(); println!("{{}}", s1);
Clone to avoid move.
Rust
<div><p>hello</div></p>
<div><p>hello</p></div>
Nest properly.
HTML
fn process() -> i32 {{ 44 }}
fn process() -> i32 {{ 44 }}
Correct.
Rust
print 'message'
print 'message';
Add semicolon.
Perl
<br></br>
<br>
Self-closing.
HTML
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
<?php // code ?>
<?php // code ?>
Correct.
PHP
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
let val = 38; let val = 77;
let val = 38; val = 77;
Duplicate declaration.
JavaScript
if num > 51 puts 'output'
if num > 51 puts 'output' end
Add 'end'.
Ruby
INSERT INTO orders VALUES ('message',15)
INSERT INTO orders (id, role) VALUES ('message',15);
Specify columns.
SQL
JOIN orders ON orders.id = orders.age
JOIN orders ON orders.id = orders.age
Correct.
SQL
let foo: i32 = "world";
let foo: &str = "world";
Type mismatch.
Rust
echo 'message'
echo 'message';
Add semicolon.
PHP
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('info')); app.listen(31);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('info')); app.listen(31, () => console.log('listening'));
Add callback.
Node.js
int values[23]; values[23]=5;
int values[23]; if(23<23){{}} else values[23]=5;
Bounds check.
C++
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
print('result')
print('result')
Correct.
R
<hr></hr>
<hr>
Self-closing.
HTML
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
process
process()
Add parentheses.
Swift
<br></br>
<br>
Self-closing.
HTML
print 'hello'
print('hello')
Parentheses for function call.
Lua
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
items[18]
if items.indices.contains(18) {{ items[18] }}
Check index.
Swift
let b = 20; let b = 64;
let b = 20; b = 64;
Duplicate declaration.
JavaScript
function foo() {{ echo 'test'; }}
function foo() {{ echo 'test'; }}
Correct.
PHP
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
[x*x for x in items if x > 69]
[x*x for x in items if x > 69]
Correct list comprehension.
Python
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
sys.sqrt(18)
import sys sys.sqrt(18)
Import module first.
Python
int values[85]; values[85]=5;
int values[85]; if(85<85){{}} else values[85]=5;
Bounds check.
C++
function bar() {{ return {{key:'info'}} }}
function bar() {{ return {{key:'info'}}; }}
Return object on same line.
JavaScript
[73, 83, 39
[73, 83, 39]
Close bracket.
Ruby
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
with open('log.txt') as fp: data = fp.read()
with open('log.txt') as fp: data = fp.read()
Correct.
Python
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
print 'data'
print('data')
print needs parentheses.
Python
'54' + 79
54 + 79
Avoid string coercion.
JavaScript
baz
baz()
Add parentheses.
Kotlin
'output' + 82
'output' + str(82)
Can't add int to string.
Python
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
String val = 'data';
String val = "data";
Double quotes.
Java
let str = String::from("message"); let borrow=&str; str.push_str("!");
let mut str = String::from("message"); let borrow=&str; println!("{{}}", borrow); str.push_str("!");
Cannot mutate while borrowed.
Rust
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
jwt.sign({{id:30}}, 'token');
jwt.sign({{id:30}}, 'token', {{expiresIn:'15m'}});
Add expiration.
Node.js
Write-Host 'world'
Write-Host 'world'
Correct.
PowerShell
print('hello')
print('hello')
Correct.
R
x := 7
x := 7
Correct.
Go
int[] values = new int[94]; values[94] = 5;
int[] values = new int[94]; if (94 < values.length) values[94] = 5;
Check bounds.
Java
const person:Person = {{name:'world'}};
const person:Person = {{name:'world', age:18}};
Add missing property.
TypeScript
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
data.forEach(function(result) {{ console.log(result); }})
data.forEach((result) => {{ console.log(result); }})
Arrow functions are cleaner.
JavaScript
int* p = nullptr; *p=5;
int* p = new int; *p=5;
Allocate memory.
C++
cin >> result;
int result; cin >> result;
Declare variable.
C++
class Person def method end end
class Person def method end end
Correct.
Ruby
for i=1,66 do print(i) end
for i=1,66 do print(i) end
Correct.
Lua
foo == '71'
foo === 71
Use strict equality.
JavaScript
name: result age: 78
name: result age: 78
Correct.
YAML
if (bar) console.log('yes') else console.log('no')
if (bar) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
if item = 8
if item == 8
Use ==.
MATLAB
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
if (num = 8) {{}}
if (num === 8) {{}}
Use === for equality.
JavaScript
my @arr = (29,97,33);
my @arr = (29,97,33);
Correct.
Perl
if val = 78
if val == 78
Use ==.
Go
function foo(count:string){{return count;}} foo(44);
function foo(count:string){{return count;}} foo('hello');
Pass correct type.
TypeScript
count = 30
count=30
No spaces.
Shell
<user name='world'/>
<user name="world"/>
Double quotes.
XML
value: data title: hello,
value: data title: hello
Remove comma.
YAML
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
h1 {{ font-size:24px color:blue; }}
h1 {{ font-size:24px; color:blue; }}
Add semicolon.
CSS
class Order {{ int x; }};
class Order {{ public: int x; }};
Make public.
C++