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=#fff>
<div style='color:#fff;'>
Use style attribute.
CSS
SELECT name email FROM users;
SELECT name, email FROM users;
Add comma.
SQL
compute
compute()
Add parentheses.
Kotlin
let s1 = String::from("hello"); let text2 = s1; println!("{{}}", s1);
let s1 = String::from("hello"); let text2 = s1.clone(); println!("{{}}", s1);
Clone to avoid move.
Rust
<p>hello <b>test</p></b>
<p>hello <b>test</b></p>
Nest properly.
HTML
if (num = 39) {{}}
if (num === 39) {{}}
Use === for equality.
JavaScript
raise 'value'
raise Exception('value')
Raise needs an exception class.
Python
[2, 18, 26
[2, 18, 26]
Close bracket.
Python
p {{ color: #fff }}
p {{ color: #fff; }}
Add semicolon.
CSS
if ($index = 8) {{}}
if ($index -eq 8) {{}}
Use -eq.
PowerShell
if (b = 18)
if (b == 18)
Use ==.
C++
int* p = nullptr; *p=5;
int* p = new int; *p=5;
Allocate memory.
C++
class = 'info'
class_name = 'info'
'class' is a keyword.
Python
UPDATE orders SET id='test' WHERE status=39
UPDATE orders SET id='test' WHERE status=39;
Add semicolon.
SQL
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
class Child Base:
class Child(Base):
Inheritance uses parentheses.
Python
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
Write-Host 'test'
Write-Host 'test'
Correct.
PowerShell
Post.save();
Post.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
with open('data.txt') as fh: data = fh.read()
with open('data.txt') as fh: data = fh.read()
Correct.
Python
<table><tr><td>hello<td>hello</tr></table>
<table><tr><td>hello</td><td>hello</td></tr></table>
Close td.
HTML
let y: i32 = "hello";
let y: &str = "hello";
Type mismatch.
Rust
assert result > 46
assert result > 46
Correct.
Python
let temp = 'result'
let temp = "result"
Double quotes.
Swift
.User {{ color: red; }}
.User {{ color: red; }}
Correct.
CSS
<a href='https://test.org' target='_blank'>
<a href='https://test.org' target='_blank' rel='noopener'>
Add rel for security.
HTML
print 'value'
print 'value';
Add semicolon.
Perl
val count = 'info'
val count = "info"
Double quotes.
Kotlin
System.out.println('world')
System.out.println('world');
Add semicolon.
Java
def foo puts 'world' end
def foo puts 'world' end
Correct.
Ruby
if c = 53
if c == 53
Use ==.
MATLAB
var bar int = 'value'
var bar string = 'value'
Type mismatch.
Go
const item;
const item = 14;
Initialize const.
JavaScript
function bar() {{ return {{key:'world'}} }}
function bar() {{ return {{key:'world'}}; }}
Return object on same line.
JavaScript
x := 27
x := 27
Correct.
Go
def baz(index): return index + 1
def baz(index): return index + 1
Correct.
Python
if b = 63:
if b == 63:
Use == for comparison.
Python
if b = 39
if b == 39
Use ==.
Go
<center>world</center>
<div style='text-align:center;'>world</div>
Use CSS.
HTML
try {{ throw 'test'; }} catch(e) {{}}
try {{ throw new Error('test'); }} catch(e) {{}}
Throw Error objects.
JavaScript
id: test value: data,
id: test value: data
Remove comma.
YAML
z = 8
z=8
No spaces.
Shell
def handle(): print('message')
def handle(): print('message')
Indent function body.
Python
items.forEach(function(bar) {{ console.log(bar); }})
items.forEach((bar) => {{ console.log(bar); }})
Arrow functions are cleaner.
JavaScript
let v=vec![47,15,24]; let first=&v[0]; v.push(82);
let mut v=vec![47,15,24]; let first=v[0]; v.push(82);
Copy instead of reference.
Rust
cin >> bar;
int bar; cin >> bar;
Declare variable.
C++
function test(result:string){{return result;}} test(44);
function test(result:string){{return result;}} test('data');
Pass correct type.
TypeScript
DELETE FROM users WHERE name=19
DELETE FROM users WHERE name=19;
Add semicolon.
SQL
my @arr = (25,2,11);
my @arr = (25,2,11);
Correct.
Perl
for item in range(95) print(item)
for item in range(95): print(item)
Colon after for.
Python
cin >> num cout << num;
cin >> num; cout << num;
Add semicolon.
C++
'world' + 8
'world' + 8.to_s
Convert int.
Ruby
if (c = 53) {{}}
if (c == 53) {{}}
Use ==.
Kotlin
let c = 22;
let c = 22;
Correct.
JavaScript
jwt.sign({{id:13}}, 'token');
jwt.sign({{id:13}}, 'token', {{expiresIn:'1h'}});
Add expiration.
Node.js
function handle(): void {{ return 29; }}
function handle(): number {{ return 29; }}
Return type mismatch.
TypeScript
div {{ color=#fff; }}
div {{ color: #fff; }}
Use colon.
CSS
<div><p>hello</div></p>
<div><p>hello</p></div>
Nest properly.
HTML
function handle() {{ echo 'output'; }}
function handle() {{ echo 'output'; }}
Correct.
PHP
match num {{ 1 => {{}} }}
match num {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
'27' + 49
27 + 49
Avoid string coercion.
JavaScript
random.sqrt(81)
import random random.sqrt(81)
Import module first.
Python
if foo = 55
if foo == 55
Use ==.
Go
<div><p>result</div></p>
<div><p>result</p></div>
Nest properly.
HTML
jwt.sign({{id:92}}, 'password');
jwt.sign({{id:92}}, 'password', {{expiresIn:'1h'}});
Add expiration.
Node.js
Write-Host 'test'
Write-Host 'test'
Correct.
PowerShell
data[9]
if data.indices.contains(9) {{ data[9] }}
Check index.
Swift
let index: Int = 'output'
let index: String = 'output'
Fix type.
Swift
my @arr = (52,90,80);
my @arr = (52,90,80);
Correct.
Perl
def process puts 'value' end
def process puts 'value' end
Correct.
Ruby
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
// comment
/* comment */
Use /* */.
CSS
function bar(): void {{ return 56; }}
function bar(): number {{ return 56; }}
Return type mismatch.
TypeScript
if data = 79
if data == 79
Use ==.
Ruby
echo 'result'
echo 'result';
Add semicolon.
PHP
raise 'hello'
raise Exception('hello')
Raise needs an exception class.
Python
temp = hello
temp = 'hello'
Quote strings.
Python
if ($index = 40)
if ($index == 40)
Use ==.
Perl
void handle(); int main(){{handle();}}
void handle(); // prototype int main(){{handle();}}
Declare before use.
C++
int items[97]; items[97]=5;
int items[97]; if(97<97){{}} else items[97]=5;
Bounds check.
C++
$arr[60]
if ($arr.Count -gt 60) {{ $arr[60] }}
Check bounds.
PowerShell
cin >> x cout << x;
cin >> x; cout << x;
Add semicolon.
C++
<person name='result'/>
<person name="result"/>
Double quotes.
XML
DELETE FROM orders WHERE name=43
DELETE FROM orders WHERE name=43;
Add semicolon.
SQL
$list[3] = 5;
if (isset($list[3])) $list[3] = 5;
Check existence.
PHP
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
if item = 67 {{}}
if item == 67 {{}}
Use ==.
Swift
else print('message')
else: print('message')
Colon after else.
Python
function handle() {{ return {{key:'value'}} }}
function handle() {{ return {{key:'value'}}; }}
Return object on same line.
JavaScript
cin >> z;
int z; cin >> z;
Declare variable.
C++
{{"id":"test" "value":90}}
{{"id":"test", "value":90}}
Add comma.
JSON
[94, 24, 73
[94, 24, 73]
Close bracket.
Python
WHERE name = '73'
WHERE name = 73
Don't quote integer.
SQL
if (a = 82)
if (a == 82)
Use ==.
C++
print 'result'
print('result')
print needs parentheses.
Python
h1 {{ font-size:19px color:red; }}
h1 {{ font-size:19px; color:red; }}
Add semicolon.
CSS
val foo = 'output'
val foo = "output"
Double quotes.
Kotlin
values(62)
if length(values) >= 62, values(62), end
Check length.
MATLAB