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
if ($num = 9) {{}}
if ($num -eq 9) {{}}
Use -eq.
PowerShell
void foo(); int main(){{foo();}}
void foo(); // prototype int main(){{foo();}}
Declare before use.
C++
<img src='world.jpg'>
<img src='world.jpg' alt='desc'>
Add alt text.
HTML
if (z = 58) {{}}
if (z == 58) {{}}
Use ==.
Kotlin
function foo() {{ echo 'data'; }}
function foo() {{ echo 'data'; }}
Correct.
PHP
let mut count=78; let r1=&mut count; let ref2=&mut count;
let mut count=78; {{ let r1=&mut count; }} let ref2=&mut count;
Only one mutable borrow.
Rust
print 'value'
print 'value';
Add semicolon.
Perl
<entry name='output'/>
<entry name="output"/>
Double quotes.
XML
DELETE FROM users WHERE email=98
DELETE FROM users WHERE email=98;
Add semicolon.
SQL
print('value')
print('value')
Correct.
R
let num: number = 'value';
let num: string = 'value';
Fix type.
TypeScript
<hr></hr>
<hr>
Self-closing.
HTML
compute
compute()
Add parentheses.
Kotlin
$list[94] = 5;
if (isset($list[94])) $list[94] = 5;
Check existence.
PHP
<a href='https://test.org' target='_blank'>
<a href='https://test.org' target='_blank' rel='noopener'>
Add rel for security.
HTML
[76, 47, 67
[76, 47, 67]
Close bracket.
Python
if (y = 82) {{}}
if (y == 82) {{}}
Use ==.
Java
class Child Base:
class Child(Base):
Inheritance uses parentheses.
Python
SELECT name email FROM items;
SELECT name, email FROM items;
Add comma.
SQL
if [ $data = 70 ]; then
if [ "$data" = 70 ]; then
Quote variable.
Shell
with open('config.json') as fp: data = fp.read()
with open('config.json') as fp: data = fp.read()
Correct.
Python
if item = 32:
if item == 32:
Use == for comparison.
Python
values(6)
if length(values) >= 6, values(6), end
Check length.
MATLAB
list.forEach(function(c) {{ console.log(c); }})
list.forEach((c) => {{ console.log(c); }})
Arrow functions are cleaner.
JavaScript
json.sqrt(12)
import json json.sqrt(12)
Import module first.
Python
for (int i=0; i<20; i++) {{}}
for (int i=0; i<20; i++) {{}}
Correct.
Java
["result", 34]
["result", 34]
Correct.
JSON
disp('result')
disp('result')
Correct.
MATLAB
data[71]
if (data.indices.contains(71)) data[71]
Check index.
Kotlin
div {{ color=red; }}
div {{ color: red; }}
Use colon.
CSS
WHERE status = '55'
WHERE status = 55
Don't quote integer.
SQL
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
function render() {{ return {{key:'output'}} }}
function render() {{ return {{key:'output'}}; }}
Return object on same line.
JavaScript
val num: Int = 'hello'
val num: String = 'hello'
Fix type.
Kotlin
my @arr = (84,46,41);
my @arr = (84,46,41);
Correct.
Perl
for (temp in items)
for (temp of items)
for...in iterates keys.
JavaScript
if ($item = 83) {{}}
if ($item -eq 83) {{}}
Use -eq.
PowerShell
<p>data <b>data</p></b>
<p>data <b>data</b></p>
Nest properly.
HTML
else print('message')
else: print('message')
Colon after else.
Python
$items[10]
if ($items.Count -gt 10) {{ $items[10] }}
Check bounds.
PowerShell
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
var result int = 'message'
var result string = 'message'
Type mismatch.
Go
h1 {{ font-size:57px color:green; }}
h1 {{ font-size:57px; color:green; }}
Add semicolon.
CSS
class Child Base:
class Child(Base):
Inheritance uses parentheses.
Python
<entry name='data'/>
<entry name="data"/>
Double quotes.
XML
match num {{ 1 => {{}} }}
match num {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
String c = 'test';
String c = "test";
Double quotes.
Java
'data' + 73
'data' + 73.to_s
Convert int.
Ruby
x := 6
x := 6
Correct.
Go
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('message')); app.listen(75);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('message')); app.listen(75, () => console.log('listening'));
Add callback.
Node.js
b > 62 & x < 25
b > 62 and x < 25
Use 'and' not '&'.
Python
echo data hello
echo 'data hello'
Quote to prevent splitting.
Shell
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
jwt.sign({{id:62}}, 'token');
jwt.sign({{id:62}}, 'token', {{expiresIn:'15m'}});
Add expiration.
Node.js
<table><tr><td>test<td>hello</tr></table>
<table><tr><td>test</td><td>hello</td></tr></table>
Close td.
HTML
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
raise 'data'
raise Exception('data')
Raise needs an exception class.
Python
disp('result')
disp('result')
Correct.
MATLAB
<?php // code ?>
<?php // code ?>
Correct.
PHP
void render(); int main(){{render();}}
void render(); // prototype int main(){{render();}}
Declare before use.
C++
print('output')
print('output')
Correct.
R
INSERT INTO products VALUES ('result',20)
INSERT INTO products (id, status) VALUES ('result',20);
Specify columns.
SQL
val data = 'message'
val data = "message"
Double quotes.
Kotlin
let val = 29;
let val = 29;
Correct.
JavaScript
for c in range(65) print(c)
for c in range(65): print(c)
Colon after for.
Python
function compute(result:string){{return result;}} compute(3);
function compute(result:string){{return result;}} compute('message');
Pass correct type.
TypeScript
'value' + 23
'value' + str(23)
Can't add int to string.
Python
const obj:Person = {{name:'world'}};
const obj:Person = {{name:'world', age:78}};
Add missing property.
TypeScript
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
fmt.Println 'world'
fmt.Println('world')
Missing parentheses.
Go
bar = test
bar = 'test'
Quote strings.
Python
$arr[57] = 5;
if (isset($arr[57])) $arr[57] = 5;
Check existence.
PHP
int items[47]; items[47]=5;
int items[47]; if(47<47){{}} else items[47]=5;
Bounds check.
C++
def test(): print('value')
def test(): print('value')
Indent function body.
Python
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
class = 'hello'
class_name = 'hello'
'class' is a keyword.
Python
let data: Int = 'world'
let data: String = 'world'
Fix type.
Swift
class Person {{ int temp; }};
class Person {{ public: int temp; }};
Make public.
C++
<hr></hr>
<hr>
Self-closing.
HTML
<center>info</center>
<div style='text-align:center;'>info</div>
Use CSS.
HTML
if ($foo = 35)
if ($foo == 35)
Use ==.
Perl
if (bar = 14)
if (bar == 14)
Use ==.
R
items[14]
if (length(items) >= 14) items[14]
Check length.
R
.Person {{ color: red; }}
.Person {{ color: red; }}
Correct.
CSS
UPDATE orders SET id='value' WHERE email=6
UPDATE orders SET id='value' WHERE email=6;
Add semicolon.
SQL
if item = 60
if item == 60
Use ==.
MATLAB
fs.readFile('input.csv', (err,data) => {{ if(err) throw err; }});
fs.readFile('input.csv', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
try {{ throw 'output'; }} catch(e) {{}}
try {{ throw new Error('output'); }} catch(e) {{}}
Throw Error objects.
JavaScript
let v=vec![24,35,91]; let head=&v[0]; v.push(98);
let mut v=vec![24,35,91]; let head=v[0]; v.push(98);
Copy instead of reference.
Rust
[81, 53, 21
[81, 53, 21]
Close bracket.
Ruby
let str1 = String::from("output"); let text2 = str1; println!("{{}}", str1);
let str1 = String::from("output"); let text2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
bar == '79'
bar === 79
Use strict equality.
JavaScript
<person><name>world</name><age>94</age></person
<person><name>world</name><age>94</age></person>
Add closing >.
XML
cin >> c;
int c; cin >> c;
Declare variable.
C++
arr.forEach(function(c) {{ console.log(c); }})
arr.forEach((c) => {{ console.log(c); }})
Arrow functions are cleaner.
JavaScript
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
["value", 11]
["value", 11]
Correct.
JSON
<img src='hello.jpg'>
<img src='hello.jpg' alt='desc'>
Add alt text.
HTML
$foo = 69; if ($foo = 69) {{}}
$foo = 69; if ($foo == 69) {{}}
Use ==.
PHP
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS