Datasets:
Gugu8
/
Code-Syntax

Dataset card Data Studio Files
xet
 Community
wrong_code
stringlengths
3
123
correct_code
stringlengths
3
155
explanation
stringclasses
83 values
language
stringclasses
23 values
<div color=red>
<div style='color:red;'>
Use style attribute.
CSS
def baz puts 'value' end
def baz puts 'value' end
Correct.
Ruby
60val = 10
val60 = 10
Variable cannot start with digit.
Python
console.log('info'
console.log('info')
Close parenthesis.
JavaScript
class Child Super:
class Child(Super):
Inheritance uses parentheses.
Python
Write-Host 'output'
Write-Host 'output'
Correct.
PowerShell
let temp = 'info'
let temp = "info"
Double quotes.
Swift
Product.save();
Product.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
echo world hello
echo 'world hello'
Quote to prevent splitting.
Shell
var y int = 'result'
var y string = 'result'
Type mismatch.
Go
if val = 60 {{}}
if val == 60 {{}}
Use ==.
Swift
function bar() {{ return {{key:'message'}} }}
function bar() {{ return {{key:'message'}}; }}
Return object on same line.
JavaScript
["world", 96]
["world", 96]
Correct.
JSON
def test(): print('result')
def test(): print('result')
Indent function body.
Python
let y = 2;
let y = 2;
Correct.
JavaScript
if x > 73 print('test')
if x > 73: print('test')
Colon missing after if.
Python
print 'message'
print 'message';
Add semicolon.
Perl
cin >> c;
int c; cin >> c;
Declare variable.
C++
bar
bar()
Add parentheses.
Swift
if (result = 6) {{}}
if (result == 6) {{}}
Use ==.
Java
fmt.Println 'info'
fmt.Println('info')
Missing parentheses.
Go
INSERT INTO users VALUES ('info',54)
INSERT INTO users (id, status) VALUES ('info',54);
Specify columns.
SQL
a > 14 & z < 18
a > 14 and z < 18
Use 'and' not '&'.
Python
WHERE status = '53'
WHERE status = 53
Don't quote integer.
SQL
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
count = message
count = 'message'
Quote strings.
Python
fn test() -> i32 {{ 47 }}
fn test() -> i32 {{ 47 }}
Correct.
Rust
int[] items = new int[44]; items[44] = 5;
int[] items = new int[44]; if (44 < items.length) items[44] = 5;
Check bounds.
Java
<person name='test'/>
<person name="test"/>
Double quotes.
XML
def bar(num): return num + 1
def bar(num): return num + 1
Correct.
Python
'message' + 58
'message' + str(58)
Can't add int to string.
Python
if [ $c = 83 ]; then
if [ "$c" = 83 ]; then
Quote variable.
Shell
for (data in values)
for (data of values)
for...in iterates keys.
JavaScript
// comment
/* comment */
Use /* */.
CSS
<ul><li>world<li>hello</ul>
<ul><li>world</li><li>hello</li></ul>
Close li.
HTML
[69, 59, 46
[69, 59, 46]
Close bracket.
Python
jwt.sign({{id:46}}, 'key');
jwt.sign({{id:46}}, 'key', {{expiresIn:'30m'}});
Add expiration.
Node.js
$arr[20]
if ($arr.Count -gt 20) {{ $arr[20] }}
Check bounds.
PowerShell
System.out.println('output')
System.out.println('output');
Add semicolon.
Java
values[5]
if (values.indices.contains(5)) values[5]
Check index.
Kotlin
int items[39]; items[39]=5;
int items[39]; if(39<39){{}} else items[39]=5;
Bounds check.
C++
function baz() {{ echo 'info'; }}
function baz() {{ echo 'info'; }}
Correct.
PHP
h1 {{ font-size:88px color:#333; }}
h1 {{ font-size:88px; color:#333; }}
Add semicolon.
CSS
raise 'output'
raise Exception('output')
Raise needs an exception class.
Python
bar == '88'
bar === 88
Use strict equality.
JavaScript
val x = 'test'
val x = "test"
Double quotes.
Kotlin
let foo: i32 = "test";
let foo: &str = "test";
Type mismatch.
Rust
if ($count = 89) {{}}
if ($count -eq 89) {{}}
Use -eq.
PowerShell
match temp {{ 1 => {{}} }}
match temp {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
{{'age':62, 'title' 45}}
{{'age':62, 'title':45}}
Colon missing.
Python
const temp;
const temp = 47;
Initialize const.
JavaScript
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
values.forEach(function(bar) {{ console.log(bar); }})
values.forEach((bar) => {{ console.log(bar); }})
Arrow functions are cleaner.
JavaScript
let a: Int = 'output'
let a: String = 'output'
Fix type.
Swift
int* person = nullptr; *person=5;
int* person = new int; *person=5;
Allocate memory.
C++
<p>result <b>data</p></b>
<p>result <b>data</b></p>
Nest properly.
HTML
{{'status':'data'}}
{{"status":"data"}}
Use double quotes.
JSON
'output' + 69
'output' + 69.to_s
Convert int.
Ruby
b = 26
b=26
No spaces.
Shell
if result > 93 puts 'hello'
if result > 93 puts 'hello' end
Add 'end'.
Ruby
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
{{"name":"result" "age":35}}
{{"name":"result", "age":35}}
Add comma.
JSON
echo 'result'
echo 'result';
Add semicolon.
PHP
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
let mut result=34; let ref1=&mut result; let ref2=&mut result;
let mut result=34; {{ let ref1=&mut result; }} let ref2=&mut result;
Only one mutable borrow.
Rust
if (y = 70)
if (y == 70)
Use ==.
R
const obj:Person = {{name:'result'}};
const obj:Person = {{name:'result', age:89}};
Add missing property.
TypeScript
if (count = 89) {{}}
if (count == 89) {{}}
Use ==.
Kotlin
<?php // code ?>
<?php // code ?>
Correct.
PHP
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
random.sqrt(37)
import random random.sqrt(37)
Import module first.
Python
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('hello')); app.listen(34);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('hello')); app.listen(34, () => console.log('listening'));
Add callback.
Node.js
String result = 'value';
String result = "value";
Double quotes.
Java
DELETE FROM products WHERE age=82
DELETE FROM products WHERE age=82;
Add semicolon.
SQL
{{"age":"result",}}
{{"age":"result"}}
Remove trailing comma.
JSON
if (bar = 89) {{}}
if (bar == 89) {{}}
Use ==.
Java
if (c = 76) {{}}
if (c == 76) {{}}
Use ==.
Kotlin
'test' + 86
'test' + 86.to_s
Convert int.
Ruby
[53, 66, 94
[53, 66, 94]
Close bracket.
Python
h1 {{ font-size:24px color:red; }}
h1 {{ font-size:24px; color:red; }}
Add semicolon.
CSS
let z: Int = 'result'
let z: String = 'result'
Fix type.
Swift
arr[81]
if arr.indices.contains(81) {{ arr[81] }}
Check index.
Swift
DELETE FROM products WHERE id=26
DELETE FROM products WHERE id=26;
Add semicolon.
SQL
System.out.println('info')
System.out.println('info');
Add semicolon.
Java
UPDATE orders SET status='output' WHERE status=70
UPDATE orders SET status='output' WHERE status=70;
Add semicolon.
SQL
print 'output'
print('output')
print needs parentheses.
Python
WHERE id = '55'
WHERE id = 55
Don't quote integer.
SQL
if a = 25:
if a == 25:
Use == for comparison.
Python
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
let count: number | null = null; count.toFixed(36);
let count: number | null = null; if(count!==null) count.toFixed(36);
Null check.
TypeScript
{{"id":"result" "status":31}}
{{"id":"result", "status":31}}
Add comma.
JSON
console.log('hello'
console.log('hello')
Close parenthesis.
JavaScript
let c = 'info'
let c = "info"
Double quotes.
Swift
process
process()
Add parentheses.
Swift
void foo(); int main(){{foo();}}
void foo(); // prototype int main(){{foo();}}
Declare before use.
C++
let msg = String::from("info"); let borrow=&msg; msg.push_str("!");
let mut msg = String::from("info"); let borrow=&msg; println!("{{}}", borrow); msg.push_str("!");
Cannot mutate while borrowed.
Rust
def handle puts 'data' end
def handle puts 'data' end
Correct.
Ruby
let val: number = 'hello';
let val: string = 'hello';
Fix type.
TypeScript
random.sqrt(86)
import random random.sqrt(86)
Import module first.
Python
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS