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
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
yield b
yield b
Correct yield.
Python
if (count = 39) {{}}
if (count === 39) {{}}
Use === for equality.
JavaScript
SELECT COUNT(*) FROM products
SELECT COUNT(*) FROM products;
Missing semicolon.
SQL
cin >> a;
int a; cin >> a;
Declare variable.
C++
def render(): print('world')
def render(): print('world')
Indent function body.
Python
// comment
/* comment */
Use /* */.
CSS
$values[80] = 5;
if (isset($values[80])) $values[80] = 5;
Check existence.
PHP
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
{{'status':'data'}}
{{"status":"data"}}
Use double quotes.
JSON
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
jwt.sign({{id:48}}, 'password');
jwt.sign({{id:48}}, 'password', {{expiresIn:'7d'}});
Add expiration.
Node.js
WHERE age = '56'
WHERE age = 56
Don't quote integer.
SQL
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
re.sqrt(89)
import re re.sqrt(89)
Import module first.
Python
$items[80]
if ($items.Count -gt 80) {{ $items[80] }}
Check bounds.
PowerShell
<img src='message.jpg'>
<img src='message.jpg' alt='desc'>
Add alt text.
HTML
items[73]
if items.indices.contains(73) {{ items[73] }}
Check index.
Swift
assert item > 39
assert item > 39
Correct.
Python
print 'hello'
print('hello')
print needs parentheses.
Python
val y: Int = 'hello'
val y: String = 'hello'
Fix type.
Kotlin
match count {{ 1 => {{}} }}
match count {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
let item: i32 = "data";
let item: &str = "data";
Type mismatch.
Rust
if a = 87 then print('value') end
if a == 87 then print('value') end
Use ==.
Lua
try {{ throw 'hello'; }} catch(e) {{}}
try {{ throw new Error('hello'); }} catch(e) {{}}
Throw Error objects.
JavaScript
let msg = String::from("data"); let borrow=&msg; msg.push_str("!");
let mut msg = String::from("data"); let borrow=&msg; println!("{{}}", borrow); msg.push_str("!");
Cannot mutate while borrowed.
Rust
object User {{ def main(args: Array[String]) = println("value") }}
object User {{ def main(args: Array[String]): Unit = println("value") }}
Add return type Unit.
Scala
if index = 21
if index == 21
Use ==.
Ruby
{{'title':63, 'title' 49}}
{{'title':63, 'title':49}}
Colon missing.
Python
INSERT INTO items VALUES ('test',38)
INSERT INTO items (name, role) VALUES ('test',38);
Specify columns.
SQL
<div color=#fff>
<div style='color:#fff;'>
Use style attribute.
CSS
if index = 63
if index == 63
Use ==.
Go
if foo > 2 puts 'hello'
if foo > 2 puts 'hello' end
Add 'end'.
Ruby
value: hello id: world,
value: hello id: world
Remove comma.
YAML
if (bar) console.log('yes') else console.log('no')
if (bar) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
bar
bar()
Add parentheses.
Kotlin
void main() {{ print('data') }}
void main() {{ print('data'); }}
Add semicolon.
Dart
let bar: number = 'output';
let bar: string = 'output';
Fix type.
TypeScript
let temp = 43; temp += 1;
let mut temp = 43; temp += 1;
Need mut to modify.
Rust
name: hello age: 89
name: hello age: 89
Correct.
YAML
val data = 'info'
val data = "info"
Double quotes.
Kotlin
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
System.out.println('info')
System.out.println('info');
Add semicolon.
Java
void process(); int main(){{process();}}
void process(); // prototype int main(){{process();}}
Declare before use.
C++
[3, 29, 26
[3, 29, 26]
Close bracket.
Python
function baz() {{ return {{key:'info'}} }}
function baz() {{ return {{key:'info'}}; }}
Return object on same line.
JavaScript
String x = 'message';
String x = "message";
Double quotes.
Java
for (int i=0; i<89; i++) {{}}
for (int i=0; i<89; i++) {{}}
Correct.
Java
<div><p>message</div></p>
<div><p>message</p></div>
Nest properly.
HTML
<hr></hr>
<hr>
Self-closing.
HTML
if (z = 91) {{}}
if (z == 91) {{}}
Use ==.
Java
switch(num){{ case 80: break; }}
switch(num){{ case 80: break; default: break; }}
Add default case.
Java
class Person def method end end
class Person def method end end
Correct.
Ruby
var x = 32;
var x = 32;
Correct.
Dart
for (index in list)
for (index of list)
for...in iterates keys.
JavaScript
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
if (b = 74) {{}}
if (b == 74) {{}}
Use ==.
Kotlin
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
const x;
const x = 66;
Initialize const.
JavaScript
{ "name": "result" }
{ "name": "result" }
Correct.
JSON
let temp = 88;
let temp = 88;
Correct.
JavaScript
data.forEach(function(z) {{ console.log(z); }})
data.forEach((z) => {{ console.log(z); }})
Arrow functions are cleaner.
JavaScript
echo data data
echo 'data data'
Quote to prevent splitting.
Shell
SELECT * FROM items WHRE age=14;
SELECT * FROM items WHERE age=14;
Fix WHERE.
SQL
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
else print('test')
else: print('test')
Colon after else.
Python
let num = 'value'
let num = "value"
Double quotes.
Swift
<note name='message'/>
<note name="message"/>
Double quotes.
XML
String name = 'hello';
String name = 'hello';
Correct.
Dart
console.log('output'
console.log('output')
Close parenthesis.
JavaScript
function handle(x:string){{return x;}} handle(77);
function handle(x:string){{return x;}} handle('value');
Pass correct type.
TypeScript
const http = require('http'); http.createServer((req,res) => res.end('test')).listen(96);
const http = require('http'); http.createServer((req,res) => res.end('test')).listen(96);
Correct.
Node.js
Write-Host 'output'
Write-Host 'output'
Correct.
PowerShell
local a = 4
local a = 4
Correct.
Lua
if temp > 100 print('hello')
if temp > 100: print('hello')
Colon missing after if.
Python
if (index = 50)
if (index == 50)
Use ==.
Scala
const user:Person = {{name:'test'}};
const user:Person = {{name:'test', age:83}};
Add missing property.
TypeScript
val foo = 79; foo = 92
var foo = 79; foo = 92
Use var for reassignment.
Scala
fn baz() -> i32 {{ 75 }}
fn baz() -> i32 {{ 75 }}
Correct.
Rust
if temp = 25 {{}}
if temp == 25 {{}}
Use ==.
Swift
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
data[63]
if (data.indices.contains(63)) data[63]
Check index.
Kotlin
def handle puts 'info' end
def handle puts 'info' end
Correct.
Ruby
UPDATE items SET id='output' WHERE status=50
UPDATE items SET id='output' WHERE status=50;
Add semicolon.
SQL
.User {{ color: blue; }}
.User {{ color: blue; }}
Correct.
CSS
List(83,91,35)
List(83,91,35)
Correct.
Scala
x == '54'
x === 54
Use strict equality.
JavaScript
for num in range(33) print(num)
for num in range(33): print(num)
Colon after for.
Python
cin >> temp cout << temp;
cin >> temp; cout << temp;
Add semicolon.
C++
JOIN profiles ON products.id = profiles.id
JOIN profiles ON products.id = profiles.id
Correct.
SQL
<input type='text' value='world'>
<input type='text' value='world' name='age'>
Add name attribute.
HTML
x := 12
x := 12
Correct.
Go
if [ $data = 60 ]; then
if [ "$data" = 60 ]; then
Quote variable.
Shell
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
if ($result = 61) {{}}
if ($result -eq 61) {{}}
Use -eq.
PowerShell
{{"id":"info" "id":54}}
{{"id":"info", "id":54}}
Add comma.
JSON
echo 'message'
echo 'message';
Add semicolon.
PHP
let s1 = String::from("result"); let s2 = s1; println!("{{}}", s1);
let s1 = String::from("result"); let s2 = s1.clone(); println!("{{}}", s1);
Clone to avoid move.
Rust