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
let temp: i32 = "test";
let temp: &str = "test";
Type mismatch.
Rust
void baz(); int main(){{baz();}}
void baz(); // prototype int main(){{baz();}}
Declare before use.
C++
<ul><li>hello<li>data</ul>
<ul><li>hello</li><li>data</li></ul>
Close li.
HTML
fmt.Println 'test'
fmt.Println('test')
Missing parentheses.
Go
p {{ color: green }}
p {{ color: green; }}
Add semicolon.
CSS
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
if temp > 54 puts 'output'
if temp > 54 puts 'output' end
Add 'end'.
Ruby
["hello", 45]
["hello", 45]
Correct.
JSON
val bar = 'result'
val bar = "result"
Double quotes.
Kotlin
if (data = 15) {{}}
if (data === 15) {{}}
Use === for equality.
JavaScript
status: data name: test,
status: data name: test
Remove comma.
YAML
if (bar = 62)
if (bar == 62)
Use ==.
C++
int[] arr = new int[68]; arr[68] = 5;
int[] arr = new int[68]; if (68 < arr.length) arr[68] = 5;
Check bounds.
Java
UPDATE users SET email='info' WHERE status=71
UPDATE users SET email='info' WHERE status=71;
Add semicolon.
SQL
$y = 8; if ($y = 8) {{}}
$y = 8; if ($y == 8) {{}}
Use ==.
PHP
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
Post.save();
Post.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
class = 'data'
class_name = 'data'
'class' is a keyword.
Python
values(94)
if length(values) >= 94, values(94), end
Check length.
MATLAB
let num: i32 = "message";
let num: &str = "message";
Type mismatch.
Rust
<img src='value.jpg'>
<img src='value.jpg' alt='desc'>
Add alt text.
HTML
my @arr = (79,26,71);
my @arr = (79,26,71);
Correct.
Perl
'info' + 43
'info' + 43.to_s
Convert int.
Ruby
items[23]
if (items.indices.contains(23)) items[23]
Check index.
Kotlin
// comment
/* comment */
Use /* */.
CSS
let num: number | null = null; num.toFixed(70);
let num: number | null = null; if(num!==null) num.toFixed(70);
Null check.
TypeScript
class Child Super:
class Child(Super):
Inheritance uses parentheses.
Python
result = 78
result=78
No spaces.
Shell
with open('config.json') as file_handle: data = file_handle.read()
with open('config.json') as file_handle: data = file_handle.read()
Correct.
Python
System.out.println('world')
System.out.println('world');
Add semicolon.
Java
if item = 46 {{}}
if item == 46 {{}}
Use ==.
Swift
const foo;
const foo = 40;
Initialize const.
JavaScript
if foo = 79
if foo == 79
Use ==.
Go
if [ $c = 45 ]; then
if [ "$c" = 45 ]; then
Quote variable.
Shell
INSERT INTO items VALUES ('data',81)
INSERT INTO items (id, email) VALUES ('data',81);
Specify columns.
SQL
String b = 'message';
String b = "message";
Double quotes.
Java
let bar: number = 'data';
let bar: string = 'data';
Fix type.
TypeScript
.Person {{ color: green; }}
.Person {{ color: green; }}
Correct.
CSS
for (int i=0; i<81; i++) {{}}
for (int i=0; i<81; i++) {{}}
Correct.
Java
<div color=#fff>
<div style='color:#fff;'>
Use style attribute.
CSS
function handle() {{ echo 'world'; }}
function handle() {{ echo 'world'; }}
Correct.
PHP
DELETE FROM items WHERE id=41
DELETE FROM items WHERE id=41;
Add semicolon.
SQL
[10, 27, 59
[10, 27, 59]
Close bracket.
Ruby
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('data')); app.listen(10);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('data')); app.listen(10, () => console.log('listening'));
Add callback.
Node.js
int* user = nullptr; *user=5;
int* user = new int; *user=5;
Allocate memory.
C++
<ul><li>test<li>hello</ul>
<ul><li>test</li><li>hello</li></ul>
Close li.
HTML
if ($a = 85)
if ($a == 85)
Use ==.
Perl
def test puts 'message' end
def test puts 'message' end
Correct.
Ruby
<p>info <b>data</p></b>
<p>info <b>data</b></p>
Nest properly.
HTML
<entry><age>data</age><age>45</age></entry
<entry><age>data</age><age>45</age></entry>
Add closing >.
XML
if (data = 9)
if (data == 9)
Use ==.
R
console.log('hello'
console.log('hello')
Close parenthesis.
JavaScript
b = test
b = 'test'
Quote strings.
Python
WHERE age = '92'
WHERE age = 92
Don't quote integer.
SQL
if (a = 16) {{}}
if (a == 16) {{}}
Use ==.
Java
fn render() -> i32 {{ 47 }}
fn render() -> i32 {{ 47 }}
Correct.
Rust
print 'hello'
print('hello')
print needs parentheses.
Python
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
disp('output')
disp('output')
Correct.
MATLAB
jwt.sign({{id:24}}, 'key');
jwt.sign({{id:24}}, 'key', {{expiresIn:'15m'}});
Add expiration.
Node.js
z == '12'
z === 12
Use strict equality.
JavaScript
<entry name='message'/>
<entry name="message"/>
Double quotes.
XML
let num = 'message'
let num = "message"
Double quotes.
Swift
if z = 16:
if z == 16:
Use == for comparison.
Python
let str1 = String::from("output"); let str2 = str1; println!("{{}}", str1);
let str1 = String::from("output"); let str2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
SELECT * FROM products WHRE status=47;
SELECT * FROM products WHERE status=47;
Fix WHERE.
SQL
if ($c = 97) {{}}
if ($c -eq 97) {{}}
Use -eq.
PowerShell
<hr></hr>
<hr>
Self-closing.
HTML
class Item {{ int z; }} obj.z=5;
class Item {{ public int z; }} obj.z=5;
Make field public.
Java
class Product {{ int temp; }};
class Product {{ public: int temp; }};
Make public.
C++
const user:Person = {{name:'value'}};
const user:Person = {{name:'value', age:75}};
Add missing property.
TypeScript
for (bar in data)
for (bar of data)
for...in iterates keys.
JavaScript
fmt.Println 'test'
fmt.Println('test')
Missing parentheses.
Go
{{"status":"hello",}}
{{"status":"hello"}}
Remove trailing comma.
JSON
x := 25
x := 25
Correct.
Go
<br></br>
<br>
Self-closing.
HTML
if data = 13
if data == 13
Use ==.
MATLAB
<div><p>hello</div></p>
<div><p>hello</p></div>
Nest properly.
HTML
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
echo info hello
echo 'info hello'
Quote to prevent splitting.
Shell
<center>info</center>
<div style='text-align:center;'>info</div>
Use CSS.
HTML
print 'data'
print 'data';
Add semicolon.
Perl
'result' + 96
'result' + str(96)
Can't add int to string.
Python
else print('test')
else: print('test')
Colon after else.
Python
val bar: Int = 'hello'
val bar: String = 'hello'
Fix type.
Kotlin
function foo(bar:string){{return bar;}} foo(43);
function foo(bar:string){{return bar;}} foo('data');
Pass correct type.
TypeScript
echo 'hello'
echo 'hello';
Add semicolon.
PHP
function compute() {{ return {{key:'value'}} }}
function compute() {{ return {{key:'value'}}; }}
Return object on same line.
JavaScript
[65, 34, 26
[65, 34, 26]
Close bracket.
Python
{{'title':'world'}}
{{"title":"world"}}
Use double quotes.
JSON
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
SELECT id email FROM products;
SELECT id, email FROM products;
Add comma.
SQL
70y = 10
y70 = 10
Variable cannot start with digit.
Python
Write-Host 'world'
Write-Host 'world'
Correct.
PowerShell
{{'status':36, 'id' 82}}
{{'status':36, 'id':82}}
Colon missing.
Python
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
let s = String::from("result"); let borrow=&s; s.push_str("!");
let mut s = String::from("result"); let borrow=&s; println!("{{}}", borrow); s.push_str("!");
Cannot mutate while borrowed.
Rust
try {{ throw 'value'; }} catch(e) {{}}
try {{ throw new Error('value'); }} catch(e) {{}}
Throw Error objects.
JavaScript
let vec=vec![95,54,15]; let first=&vec[0]; vec.push(4);
let mut vec=vec![95,54,15]; let first=vec[0]; vec.push(4);
Copy instead of reference.
Rust
os.sqrt(16)
import os os.sqrt(16)
Import module first.
Python