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
Write-Host 'message'
Write-Host 'message'
Correct.
PowerShell
echo 'data'
echo 'data';
Add semicolon.
PHP
assert data > 46
assert data > 46
Correct.
Python
String index = 'world';
String index = "world";
Double quotes.
Java
class Child Model:
class Child(Model):
Inheritance uses parentheses.
Python
else print('hello')
else: print('hello')
Colon after else.
Python
<entry name='message'/>
<entry name="message"/>
Double quotes.
XML
let count: Int = 'output'
let count: String = 'output'
Fix type.
Swift
if z = 20:
if z == 20:
Use == for comparison.
Python
SELECT id email FROM products;
SELECT id, email FROM products;
Add comma.
SQL
let result: number | null = null; result.toFixed(50);
let result: number | null = null; if(result!==null) result.toFixed(50);
Null check.
TypeScript
int arr[67]; arr[67]=5;
int arr[67]; if(67<67){{}} else arr[67]=5;
Bounds check.
C++
{{'age':'test'}}
{{"age":"test"}}
Use double quotes.
JSON
function compute() {{ return {{key:'value'}} }}
function compute() {{ return {{key:'value'}}; }}
Return object on same line.
JavaScript
#footer {{ color: #333; }}
#footer {{ color: #333; }}
Correct.
CSS
if x = 92 {{}}
if x == 92 {{}}
Use ==.
Swift
{{'age':49, 'title' 30}}
{{'age':49, 'title':30}}
Colon missing.
Python
if index > 59 puts 'output'
if index > 59 puts 'output' end
Add 'end'.
Ruby
random.sqrt(41)
import random random.sqrt(41)
Import module first.
Python
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS
disp('result')
disp('result')
Correct.
MATLAB
// comment
/* comment */
Use /* */.
CSS
<div color=red>
<div style='color:red;'>
Use style attribute.
CSS
const val;
const val = 27;
Initialize const.
JavaScript
$arr[83]
if ($arr.Count -gt 83) {{ $arr[83] }}
Check bounds.
PowerShell
<table><tr><td>data<td>test</tr></table>
<table><tr><td>data</td><td>test</td></tr></table>
Close td.
HTML
void handle(); int main(){{handle();}}
void handle(); // prototype int main(){{handle();}}
Declare before use.
C++
arr[17]
if (arr.indices.contains(17)) arr[17]
Check index.
Kotlin
if (b = 40) {{}}
if (b === 40) {{}}
Use === for equality.
JavaScript
h1 {{ font-size:37px color:green; }}
h1 {{ font-size:37px; color:green; }}
Add semicolon.
CSS
fs.readFile('log.txt', (err,data) => {{ if(err) throw err; }});
fs.readFile('log.txt', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
print 'result'
print 'result';
Add semicolon.
Perl
Post.save();
Post.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
if val = 30
if val == 30
Use ==.
Go
int data[84]; data[84]=5;
int data[84]; if(84<84){{}} else data[84]=5;
Bounds check.
C++
if ($z = 3) {{}}
if ($z -eq 3) {{}}
Use -eq.
PowerShell
String foo = 'message';
String foo = "message";
Double quotes.
Java
if c > 100 print('result')
if c > 100: print('result')
Colon missing after if.
Python
'33' + 11
33 + 11
Avoid string coercion.
JavaScript
if (item = 25) {{}}
if (item == 25) {{}}
Use ==.
Java
if (x = 42)
if (x == 42)
Use ==.
C++
$data[14]
if ($data.Count -gt 14) {{ $data[14] }}
Check bounds.
PowerShell
val == '81'
val === 81
Use strict equality.
JavaScript
var num int = 'hello'
var num string = 'hello'
Type mismatch.
Go
INSERT INTO items VALUES ('message',59)
INSERT INTO items (age, role) VALUES ('message',59);
Specify columns.
SQL
let num: i32 = "data";
let num: &str = "data";
Type mismatch.
Rust
SELECT age email FROM orders;
SELECT age, email FROM orders;
Add comma.
SQL
values[47]
if (length(values) >= 47) values[47]
Check length.
R
{{"status":"test",}}
{{"status":"test"}}
Remove trailing comma.
JSON
<?php // code ?>
<?php // code ?>
Correct.
PHP
arr[47]
if (arr.indices.contains(47)) arr[47]
Check index.
Kotlin
<ul><li>test<li>hello</ul>
<ul><li>test</li><li>hello</li></ul>
Close li.
HTML
["output", 67]
["output", 67]
Correct.
JSON
if (y = 92)
if (y == 92)
Use ==.
R
Write-Host 'hello'
Write-Host 'hello'
Correct.
PowerShell
def bar puts 'info' end
def bar puts 'info' end
Correct.
Ruby
<br></br>
<br>
Self-closing.
HTML
if bar = 60
if bar == 60
Use ==.
MATLAB
match temp {{ 1 => {{}} }}
match temp {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
int[] arr = new int[24]; arr[24] = 5;
int[] arr = new int[24]; if (24 < arr.length) arr[24] = 5;
Check bounds.
Java
echo 'message'
echo 'message';
Add semicolon.
PHP
function process() {{ return {{key:'result'}} }}
function process() {{ return {{key:'result'}}; }}
Return object on same line.
JavaScript
<p>message <b>test</p></b>
<p>message <b>test</b></p>
Nest properly.
HTML
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
fn foo() -> i32 {{ 92 }}
fn foo() -> i32 {{ 92 }}
Correct.
Rust
const person:Person = {{name:'test'}};
const person:Person = {{name:'test', age:88}};
Add missing property.
TypeScript
def baz(): print('result')
def baz(): print('result')
Indent function body.
Python
if item = 87
if item == 87
Use ==.
Ruby
int* person = nullptr; *person=5;
int* person = new int; *person=5;
Allocate memory.
C++
print 'info'
print('info')
print needs parentheses.
Python
assert x > 15
assert x > 15
Correct.
Python
if z = 86 {{}}
if z == 86 {{}}
Use ==.
Swift
val item: Int = 'info'
val item: String = 'info'
Fix type.
Kotlin
let mut a=54; let r1=&mut a; let r2=&mut a;
let mut a=54; {{ let r1=&mut a; }} let r2=&mut a;
Only one mutable borrow.
Rust
UPDATE items SET name='info' WHERE status=65
UPDATE items SET name='info' WHERE status=65;
Add semicolon.
SQL
echo message data
echo 'message data'
Quote to prevent splitting.
Shell
try {{ throw 'info'; }} catch(e) {{}}
try {{ throw new Error('info'); }} catch(e) {{}}
Throw Error objects.
JavaScript
$b = 57; if ($b = 57) {{}}
$b = 57; if ($b == 57) {{}}
Use ==.
PHP
if [ $y = 52 ]; then
if [ "$y" = 52 ]; then
Quote variable.
Shell
jwt.sign({{id:34}}, 'token');
jwt.sign({{id:34}}, 'token', {{expiresIn:'30m'}});
Add expiration.
Node.js
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('output')); app.listen(48);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('output')); app.listen(48, () => console.log('listening'));
Add callback.
Node.js
fmt.Println 'value'
fmt.Println('value')
Missing parentheses.
Go
function bar(bar:string){{return bar;}} bar(24);
function bar(bar:string){{return bar;}} bar('hello');
Pass correct type.
TypeScript
.Person {{ color: red; }}
.Person {{ color: red; }}
Correct.
CSS
let c = 88;
let c = 88;
Correct.
JavaScript
for (int i=0; i<61; i++) {{}}
for (int i=0; i<61; i++) {{}}
Correct.
Java
cin >> bar;
int bar; cin >> bar;
Declare variable.
C++
my @arr = (64,7,87);
my @arr = (64,7,87);
Correct.
Perl
// comment
/* comment */
Use /* */.
CSS
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
let s = String::from("output"); let borrow=&s; s.push_str("!");
let mut s = String::from("output"); let borrow=&s; println!("{{}}", borrow); s.push_str("!");
Cannot mutate while borrowed.
Rust
if z = 63
if z == 63
Use ==.
Go
def render(item): return item + 1
def render(item): return item + 1
Correct.
Python
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS
else print('message')
else: print('message')
Colon after else.
Python
Post.save();
Post.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
$items[14] = 5;
if (isset($items[14])) $items[14] = 5;
Check existence.
PHP
if data = 68:
if data == 68:
Use == for comparison.
Python
'test' + 6
'test' + 6.to_s
Convert int.
Ruby
x := 57
x := 57
Correct.
Go