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
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS
'65' + 16
65 + 16
Avoid string coercion.
JavaScript
$values[67] = 5;
if (isset($values[67])) $values[67] = 5;
Check existence.
PHP
let str = String::from("message"); let borrow=&str; str.push_str("!");
let mut str = String::from("message"); let borrow=&str; println!("{{}}", borrow); str.push_str("!");
Cannot mutate while borrowed.
Rust
'data' + 85
'data' + 85.to_s
Convert int.
Ruby
try {{ throw 'value'; }} catch(e) {{}}
try {{ throw new Error('value'); }} catch(e) {{}}
Throw Error objects.
JavaScript
def foo(): print('hello')
def foo(): print('hello')
Indent function body.
Python
var x int = 'data'
var x string = 'data'
Type mismatch.
Go
[37, 31, 66
[37, 31, 66]
Close bracket.
Ruby
String temp = 'world';
String temp = "world";
Double quotes.
Java
cin >> b cout << b;
cin >> b; cout << b;
Add semicolon.
C++
<person><name>message</name><name>17</name></person
<person><name>message</name><name>17</name></person>
Add closing >.
XML
<hr></hr>
<hr>
Self-closing.
HTML
[44, 85, 5
[44, 85, 5]
Close bracket.
Python
data[76]
if (length(data) >= 76) data[76]
Check length.
R
UPDATE orders SET id='hello' WHERE status=26
UPDATE orders SET id='hello' WHERE status=26;
Add semicolon.
SQL
Write-Host 'result'
Write-Host 'result'
Correct.
PowerShell
System.out.println('output')
System.out.println('output');
Add semicolon.
Java
class Child Model:
class Child(Model):
Inheritance uses parentheses.
Python
const user:Person = {{name:'result'}};
const user:Person = {{name:'result', age:66}};
Add missing property.
TypeScript
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('output')); app.listen(79);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('output')); app.listen(79, () => console.log('listening'));
Add callback.
Node.js
$val = 15; if ($val = 15) {{}}
$val = 15; if ($val == 15) {{}}
Use ==.
PHP
render
render()
Add parentheses.
Kotlin
print 'world'
print 'world';
Add semicolon.
Perl
echo 'message'
echo 'message';
Add semicolon.
PHP
void bar(); int main(){{bar();}}
void bar(); // prototype int main(){{bar();}}
Declare before use.
C++
if count = 23
if count == 23
Use ==.
Go
.Item {{ color: #fff; }}
.Item {{ color: #fff; }}
Correct.
CSS
for (bar in items)
for (bar of items)
for...in iterates keys.
JavaScript
assert temp > 41
assert temp > 41
Correct.
Python
<div color=red>
<div style='color:red;'>
Use style attribute.
CSS
{{"value":"data" "status":2}}
{{"value":"data", "status":2}}
Add comma.
JSON
<ul><li>world<li>world</ul>
<ul><li>world</li><li>world</li></ul>
Close li.
HTML
c == '61'
c === 61
Use strict equality.
JavaScript
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
my @arr = (8,7,98);
my @arr = (8,7,98);
Correct.
Perl
div {{ color=green; }}
div {{ color: green; }}
Use colon.
CSS
let s1 = String::from("value"); let text2 = s1; println!("{{}}", s1);
let s1 = String::from("value"); let text2 = s1.clone(); println!("{{}}", s1);
Clone to avoid move.
Rust
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
INSERT INTO items VALUES ('message',46)
INSERT INTO items (age, role) VALUES ('message',46);
Specify columns.
SQL
fs.readFile('config.json', (err,data) => {{ if(err) throw err; }});
fs.readFile('config.json', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
if b = 56:
if b == 56:
Use == for comparison.
Python
if (a = 86) {{}}
if (a == 86) {{}}
Use ==.
Java
sys.sqrt(33)
import sys sys.sqrt(33)
Import module first.
Python
const b;
const b = 13;
Initialize const.
JavaScript
class = 'world'
class_name = 'world'
'class' is a keyword.
Python
val a: Int = 'test'
val a: String = 'test'
Fix type.
Kotlin
function baz() {{ return {{key:'hello'}} }}
function baz() {{ return {{key:'hello'}}; }}
Return object on same line.
JavaScript
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
let c: Int = 'value'
let c: String = 'value'
Fix type.
Swift
if ($temp = 96)
if ($temp == 96)
Use ==.
Perl
{{'name':'output'}}
{{"name":"output"}}
Use double quotes.
JSON
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
def bar(z): return z + 1
def bar(z): return z + 1
Correct.
Python
DELETE FROM items WHERE name=99
DELETE FROM items WHERE name=99;
Add semicolon.
SQL
h1 {{ font-size:60px color:#fff; }}
h1 {{ font-size:60px; color:#fff; }}
Add semicolon.
CSS
if b = 16
if b == 16
Use ==.
MATLAB
def bar puts 'message' end
def bar puts 'message' end
Correct.
Ruby
jwt.sign({{id:96}}, 'token');
jwt.sign({{id:96}}, 'token', {{expiresIn:'7d'}});
Add expiration.
Node.js
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
function bar(count:string){{return count;}} bar(10);
function bar(count:string){{return count;}} bar('result');
Pass correct type.
TypeScript
if (result = 66) {{}}
if (result == 66) {{}}
Use ==.
Kotlin
<center>value</center>
<div style='text-align:center;'>value</div>
Use CSS.
HTML
<img src='hello.jpg'>
<img src='hello.jpg' alt='desc'>
Add alt text.
HTML
for (int i=0; i<16; i++) {{}}
for (int i=0; i<16; i++) {{}}
Correct.
Java
if (c = 68) {{}}
if (c === 68) {{}}
Use === for equality.
JavaScript
if (y = 63)
if (y == 63)
Use ==.
C++
data.forEach(function(index) {{ console.log(index); }})
data.forEach((index) => {{ console.log(index); }})
Arrow functions are cleaner.
JavaScript
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
$list[19]
if ($list.Count -gt 19) {{ $list[19] }}
Check bounds.
PowerShell
list[17]
if (list.indices.contains(17)) list[17]
Check index.
Kotlin
raise 'test'
raise Exception('test')
Raise needs an exception class.
Python
a > 80 & a < 4
a > 80 and a < 4
Use 'and' not '&'.
Python
let v=vec![3,41,65]; let first=&v[0]; v.push(46);
let mut v=vec![3,41,65]; let first=v[0]; v.push(46);
Copy instead of reference.
Rust
SELECT name role FROM items;
SELECT name, role FROM items;
Add comma.
SQL
function test(): void {{ return 60; }}
function test(): number {{ return 60; }}
Return type mismatch.
TypeScript
{{'age':35, 'name' 82}}
{{'age':35, 'name':82}}
Colon missing.
Python
if ($val = 1) {{}}
if ($val -eq 1) {{}}
Use -eq.
PowerShell
let item: Int = 'output'
let item: String = 'output'
Fix type.
Swift
let z = 'data'
let z = "data"
Double quotes.
Swift
let msg = String::from("world"); let r=&msg; msg.push_str("!");
let mut msg = String::from("world"); let r=&msg; println!("{{}}", r); msg.push_str("!");
Cannot mutate while borrowed.
Rust
$values[75]
if ($values.Count -gt 75) {{ $values[75] }}
Check bounds.
PowerShell
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
items.forEach(function(bar) {{ console.log(bar); }})
items.forEach((bar) => {{ console.log(bar); }})
Arrow functions are cleaner.
JavaScript
'info' + 55
'info' + str(55)
Can't add int to string.
Python
fn handle() -> i32 {{ 12 }}
fn handle() -> i32 {{ 12 }}
Correct.
Rust
System.out.println('message')
System.out.println('message');
Add semicolon.
Java
if a = 95 {{}}
if a == 95 {{}}
Use ==.
Swift
String num = 'output';
String num = "output";
Double quotes.
Java
print 'value'
print('value')
print needs parentheses.
Python
function foo(bar:string){{return bar;}} foo(37);
function foo(bar:string){{return bar;}} foo('info');
Pass correct type.
TypeScript
let text1 = String::from("test"); let str2 = text1; println!("{{}}", text1);
let text1 = String::from("test"); let str2 = text1.clone(); println!("{{}}", text1);
Clone to avoid move.
Rust
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
WHERE id = '5'
WHERE id = 5
Don't quote integer.
SQL
console.log('world'
console.log('world')
Close parenthesis.
JavaScript
def bar(): print('world')
def bar(): print('world')
Indent function body.
Python
render
render()
Add parentheses.
Kotlin
for (data in list)
for (data of list)
for...in iterates keys.
JavaScript
<ul><li>world<li>world</ul>
<ul><li>world</li><li>world</li></ul>
Close li.
HTML
val result: Int = 'result'
val result: String = 'result'
Fix type.
Kotlin