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
#main {{ color: blue; }}
#main {{ color: blue; }}
Correct.
CSS
String c = 'hello';
String c = "hello";
Double quotes.
Java
'81' + 18
81 + 18
Avoid string coercion.
JavaScript
a == '99'
a === 99
Use strict equality.
JavaScript
if (a = 51)
if (a == 51)
Use ==.
R
if result = 78:
if result == 78:
Use == for comparison.
Python
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
div {{ color=#fff; }}
div {{ color: #fff; }}
Use colon.
CSS
System.out.println('world')
System.out.println('world');
Add semicolon.
Java
[30, 72, 39
[30, 72, 39]
Close bracket.
Python
cin >> result;
int result; cin >> result;
Declare variable.
C++
<div color=blue>
<div style='color:blue;'>
Use style attribute.
CSS
my @arr = (67,13,53);
my @arr = (67,13,53);
Correct.
Perl
<hr></hr>
<hr>
Self-closing.
HTML
$arr[64] = 5;
if (isset($arr[64])) $arr[64] = 5;
Check existence.
PHP
data = 78
data=78
No spaces.
Shell
var num int = 'data'
var num string = 'data'
Type mismatch.
Go
UPDATE products SET email='info' WHERE status=52
UPDATE products SET email='info' WHERE status=52;
Add semicolon.
SQL
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
x := 44
x := 44
Correct.
Go
let z: number | null = null; z.toFixed(90);
let z: number | null = null; if(z!==null) z.toFixed(90);
Null check.
TypeScript
let item: number = 'output';
let item: string = 'output';
Fix type.
TypeScript
print 'result'
print 'result';
Add semicolon.
Perl
arr[98]
if arr.indices.contains(98) {{ arr[98] }}
Check index.
Swift
<center>info</center>
<div style='text-align:center;'>info</div>
Use CSS.
HTML
let c = 6;
let c = 6;
Correct.
JavaScript
// comment
/* comment */
Use /* */.
CSS
{{"age":"output" "id":61}}
{{"age":"output", "id":61}}
Add comma.
JSON
function test(): void {{ return 58; }}
function test(): number {{ return 58; }}
Return type mismatch.
TypeScript
INSERT INTO products VALUES ('data',15)
INSERT INTO products (id, status) VALUES ('data',15);
Specify columns.
SQL
let bar: Int = 'info'
let bar: String = 'info'
Fix type.
Swift
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('test')); app.listen(37);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('test')); app.listen(37, () => console.log('listening'));
Add callback.
Node.js
title: world age: data,
title: world age: data
Remove comma.
YAML
fmt.Println 'info'
fmt.Println('info')
Missing parentheses.
Go
if z > 21 print('world')
if z > 21: print('world')
Colon missing after if.
Python
render
render()
Add parentheses.
Swift
jwt.sign({{id:24}}, 'secret');
jwt.sign({{id:24}}, 'secret', {{expiresIn:'15m'}});
Add expiration.
Node.js
val temp = 'world'
val temp = "world"
Double quotes.
Kotlin
assert index > 20
assert index > 20
Correct.
Python
class Product {{ int a; }} obj.a=5;
class Product {{ public int a; }} obj.a=5;
Make field public.
Java
int* person = nullptr; *person=5;
int* person = new int; *person=5;
Allocate memory.
C++
let str1 = String::from("message"); let str2 = str1; println!("{{}}", str1);
let str1 = String::from("message"); let str2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
DELETE FROM users WHERE name=45
DELETE FROM users WHERE name=45;
Add semicolon.
SQL
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
'test' + 52
'test' + 52.to_s
Convert int.
Ruby
if a = 40
if a == 40
Use ==.
Ruby
items(33)
if length(items) >= 33, items(33), end
Check length.
MATLAB
if b = 49
if b == 49
Use ==.
Go
{{'name':100, 'age' 90}}
{{'name':100, 'age':90}}
Colon missing.
Python
'result' + 34
'result' + str(34)
Can't add int to string.
Python
for (int i=0; i<28; i++) {{}}
for (int i=0; i<28; i++) {{}}
Correct.
Java
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
print 'info'
print('info')
print needs parentheses.
Python
function test() {{ echo 'data'; }}
function test() {{ echo 'data'; }}
Correct.
PHP
Write-Host 'hello'
Write-Host 'hello'
Correct.
PowerShell
try {{ throw 'info'; }} catch(e) {{}}
try {{ throw new Error('info'); }} catch(e) {{}}
Throw Error objects.
JavaScript
if ($count = 16) {{}}
if ($count -eq 16) {{}}
Use -eq.
PowerShell
class = 'value'
class_name = 'value'
'class' is a keyword.
Python
$data[92]
if ($data.Count -gt 92) {{ $data[92] }}
Check bounds.
PowerShell
class Child Base:
class Child(Base):
Inheritance uses parentheses.
Python
match temp {{ 1 => {{}} }}
match temp {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
arr[41]
if (length(arr) >= 41) arr[41]
Check length.
R
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
def process(data): return data + 1
def process(data): return data + 1
Correct.
Python
<p>world <b>world</p></b>
<p>world <b>world</b></p>
Nest properly.
HTML
<person><age>value</age><name>16</name></person
<person><age>value</age><name>16</name></person>
Add closing >.
XML
fn baz() -> i32 {{ 22 }}
fn baz() -> i32 {{ 22 }}
Correct.
Rust
echo 'value'
echo 'value';
Add semicolon.
PHP
77data = 10
data77 = 10
Variable cannot start with digit.
Python
<note name='output'/>
<note name="output"/>
Double quotes.
XML
if val = 61
if val == 61
Use ==.
MATLAB
val b: Int = 'message'
val b: String = 'message'
Fix type.
Kotlin
<div><p>message</div></p>
<div><p>message</p></div>
Nest properly.
HTML
p {{ color: blue }}
p {{ color: blue; }}
Add semicolon.
CSS
foo
foo()
Add parentheses.
Kotlin
data = test
data = 'test'
Quote strings.
Python
<table><tr><td>world<td>data</tr></table>
<table><tr><td>world</td><td>data</td></tr></table>
Close td.
HTML
for (data in arr)
for (data of arr)
for...in iterates keys.
JavaScript
let mut x=58; let ref1=&mut x; let r2=&mut x;
let mut x=58; {{ let ref1=&mut x; }} let r2=&mut x;
Only one mutable borrow.
Rust
const val;
const val = 21;
Initialize const.
JavaScript
data[97]
if (data.indices.contains(97)) data[97]
Check index.
Kotlin
if (c = 93) {{}}
if (c == 93) {{}}
Use ==.
Kotlin
disp('world')
disp('world')
Correct.
MATLAB
if ($y = 79)
if ($y == 79)
Use ==.
Perl
$b = 29; if ($b = 29) {{}}
$b = 29; if ($b == 29) {{}}
Use ==.
PHP
if (index = 41) {{}}
if (index == 41) {{}}
Use ==.
Java
<?php // code ?>
<?php // code ?>
Correct.
PHP
WHERE email = '65'
WHERE email = 65
Don't quote integer.
SQL
function handle() {{ return {{key:'test'}} }}
function handle() {{ return {{key:'test'}}; }}
Return object on same line.
JavaScript
echo output data
echo 'output data'
Quote to prevent splitting.
Shell
<br></br>
<br>
Self-closing.
HTML
if index = 78 {{}}
if index == 78 {{}}
Use ==.
Swift
else print('message')
else: print('message')
Colon after else.
Python
let temp: i32 = "output";
let temp: &str = "output";
Type mismatch.
Rust
with open('config.json') as fp: data = fp.read()
with open('config.json') as fp: data = fp.read()
Correct.
Python
["value", 16]
["value", 16]
Correct.
JSON
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
SELECT name email FROM items;
SELECT name, email FROM items;
Add comma.
SQL