Datasets:
Gugu8
/
Code-Syntax-Expanded

Dataset card Data Studio Files
xet
 Community
1
wrong_code
stringlengths
3
123
correct_code
stringlengths
3
155
explanation
stringclasses
101 values
language
stringclasses
26 values
WHERE email = '29'
WHERE email = 29
Don't quote integer.
SQL
console.log('data'
console.log('data')
Close parenthesis.
JavaScript
class = 'message'
class_name = 'message'
'class' is a keyword.
Python
<div color=#fff>
<div style='color:#fff;'>
Use style attribute.
CSS
local b = 85
local b = 85
Correct.
Lua
// comment
/* comment */
Use /* */.
CSS
val item = 'message'
val item = "message"
Double quotes.
Kotlin
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
println('result')
println("result")
Double quotes.
Scala
if (item = 65) {{}}
if (item == 65) {{}}
Use ==.
Kotlin
if ($b = 61) {{}}
if ($b -eq 61) {{}}
Use -eq.
PowerShell
Write-Host 'info'
Write-Host 'info'
Correct.
PowerShell
print('hello')
print('hello')
Correct.
R
if (b) console.log('yes') else console.log('no')
if (b) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
print 'world'
print('world')
print needs parentheses.
Python
values[93]
if (values.indices.contains(93)) values[93]
Check index.
Kotlin
List(50,50,6)
List(50,50,6)
Correct.
Scala
let str1 = String::from("hello"); let s2 = str1; println!("{{}}", str1);
let str1 = String::from("hello"); let s2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
object Item {{ def main(args: Array[String]) = println("world") }}
object Item {{ def main(args: Array[String]): Unit = println("world") }}
Add return type Unit.
Scala
String num = 'world';
String num = "world";
Double quotes.
Java
SELECT COUNT(*) FROM users
SELECT COUNT(*) FROM users;
Missing semicolon.
SQL
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
void main() {{ print('value') }}
void main() {{ print('value'); }}
Add semicolon.
Dart
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
bar == '70'
bar === 70
Use strict equality.
JavaScript
result = 99
result=99
No spaces.
Shell
print 'hello'
print('hello')
Parentheses for function call.
Lua
for count in range(46) print(count)
for count in range(46): print(count)
Colon after for.
Python
[84, 70, 86
[84, 70, 86]
Close bracket.
Python
list.forEach(function(x) {{ console.log(x); }})
list.forEach((x) => {{ console.log(x); }})
Arrow functions are cleaner.
JavaScript
$arr[18] = 5;
if (isset($arr[18])) $arr[18] = 5;
Check existence.
PHP
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
count = test
count = 'test'
Quote strings.
Python
DELETE FROM products WHERE status=80
DELETE FROM products WHERE status=80;
Add semicolon.
SQL
if a = 21 then print('message') end
if a == 21 then print('message') end
Use ==.
Lua
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
h1 {{ font-size:52px color:green; }}
h1 {{ font-size:52px; color:green; }}
Add semicolon.
CSS
<br></br>
<br>
Self-closing.
HTML
function test() {{ return {{key:'result'}} }}
function test() {{ return {{key:'result'}}; }}
Return object on same line.
JavaScript
{{'status':'data'}}
{{"status":"data"}}
Use double quotes.
JSON
<div><p>test</div></p>
<div><p>test</p></div>
Nest properly.
HTML
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('test')); app.listen(79);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('test')); app.listen(79, () => console.log('listening'));
Add callback.
Node.js
if (b = 3)
if (b == 3)
Use ==.
C++
function test(x) print(x) end
function test(x) print(x) end
Correct.
Lua
let a: number | null = null; a.toFixed(100);
let a: number | null = null; if(a!==null) a.toFixed(100);
Null check.
TypeScript
function render() {{ echo 'value'; }}
function render() {{ echo 'value'; }}
Correct.
PHP
const z = 90; z = 36;
let z = 90; z = 36;
Cannot reassign const.
JavaScript
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
<person age=27>
<person age="27">
Quote attribute.
XML
print('result')
print('result')
Correct.
R
disp('hello')
disp('hello')
Correct.
MATLAB
console.log('data'
console.log('data')
Close parenthesis.
JavaScript
<hr></hr>
<hr>
Self-closing.
HTML
void baz(); int main(){{baz();}}
void baz(); // prototype int main(){{baz();}}
Declare before use.
C++
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
<user name='hello'/>
<user name="hello"/>
Double quotes.
XML
if (z = 15)
if (z == 15)
Use ==.
Scala
<br></br>
<br>
Self-closing.
HTML
[73, 9, 31
[73, 9, 31]
Close bracket.
Ruby
if count = 65
if count == 65
Use ==.
Ruby
List(67,3,26)
List(67,3,26)
Correct.
Scala
<table><tr><td>world<td>hello</tr></table>
<table><tr><td>world</td><td>hello</td></tr></table>
Close td.
HTML
{ "name": "info" }
{ "name": "info" }
Correct.
JSON
value: world age: world,
value: world age: world
Remove comma.
YAML
'world' + 15
'world' + str(15)
Can't add int to string.
Python
div {{ color=red; }}
div {{ color: red; }}
Use colon.
CSS
$items[13]
if ($items.Count -gt 13) {{ $items[13] }}
Check bounds.
PowerShell
const p:Person = {{name:'test'}};
const p:Person = {{name:'test', age:1}};
Add missing property.
TypeScript
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
print 'test'
print 'test';
Add semicolon.
Perl
if result = 73
if result == 73
Use ==.
Go
INSERT INTO items VALUES ('info',45)
INSERT INTO items (id, status) VALUES ('info',45);
Specify columns.
SQL
if (num = 20)
if (num == 20)
Use ==.
R
int* p = nullptr; *p=5;
int* p = new int; *p=5;
Allocate memory.
C++
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
<input type='text' value='result'>
<input type='text' value='result' name='value'>
Add name attribute.
HTML
'info' + 77
'info' + 77.to_s
Convert int.
Ruby
SELECT * FROM products WHRE name=34;
SELECT * FROM products WHERE name=34;
Fix WHERE.
SQL
echo 'output'
echo 'output';
Add semicolon.
PHP
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
if (index = 35) {}
if (index == 35) {}
Use ==.
Dart
function process(): void {{ return 44; }}
function process(): number {{ return 44; }}
Return type mismatch.
TypeScript
try {{ throw 'value'; }} catch(e) {{}}
try {{ throw new Error('value'); }} catch(e) {{}}
Throw Error objects.
JavaScript
match x {{ 1 => {{}} }}
match x {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
if (result) console.log('yes') else console.log('no')
if (result) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
function handle(x) print(x) end
function handle(x) print(x) end
Correct.
Lua
if [ $x = 73 ]; then
if [ "$x" = 73 ]; then
Quote variable.
Shell
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
String name = 'output';
String name = 'output';
Correct.
Dart
assert z > 57
assert z > 57
Correct.
Python
with open('data.txt') as file_handle: data = file_handle.read()
with open('data.txt') as file_handle: data = file_handle.read()
Correct.
Python
{{"status":"value" "value":45}}
{{"status":"value", "value":45}}
Add comma.
JSON
if (bar = 79) {{}}
if (bar == 79) {{}}
Use ==.
Kotlin
for (val in values)
for (val of values)
for...in iterates keys.
JavaScript
val index = 10; index = 52
var index = 10; index = 52
Use var for reassignment.
Scala
let a: number = 'test';
let a: string = 'test';
Fix type.
TypeScript
int[] values = new int[90]; values[90] = 5;
int[] values = new int[90]; if (90 < values.length) values[90] = 5;
Check bounds.
Java