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
compute
compute()
Add parentheses.
Kotlin
for (index in list)
for (index of list)
for...in iterates keys.
JavaScript
String result = 'value';
String result = "value";
Double quotes.
Java
function handle(foo) print(foo) end
function handle(foo) print(foo) end
Correct.
Lua
class Child Model:
class Child(Model):
Inheritance uses parentheses.
Python
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
class = 'value'
class_name = 'value'
'class' is a keyword.
Python
const count = 59; count = 58;
let count = 59; count = 58;
Cannot reassign const.
JavaScript
print('data')
print('data')
Correct.
R
<center>value</center>
<div style='text-align:center;'>value</div>
Use CSS.
HTML
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
data[97]
if (length(data) >= 97) data[97]
Check length.
R
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
cin >> y cout << y;
cin >> y; cout << y;
Add semicolon.
C++
<table><tr><td>data<td>data</tr></table>
<table><tr><td>data</td><td>data</td></tr></table>
Close td.
HTML
function baz(z:string){{return z;}} baz(14);
function baz(z:string){{return z;}} baz('output');
Pass correct type.
TypeScript
function process() {{ echo 'hello'; }}
function process() {{ echo 'hello'; }}
Correct.
PHP
void main() {{ print('info') }}
void main() {{ print('info'); }}
Add semicolon.
Dart
$items[8] = 5;
if (isset($items[8])) $items[8] = 5;
Check existence.
PHP
let item = 46; let item = 30;
let item = 46; item = 30;
Duplicate declaration.
JavaScript
UPDATE users SET email='test' WHERE email=61
UPDATE users SET email='test' WHERE email=61;
Add semicolon.
SQL
if (val = 75) {{}}
if (val == 75) {{}}
Use ==.
Kotlin
let result: number | null = null; result.toFixed(80);
let result: number | null = null; if(result!==null) result.toFixed(80);
Null check.
TypeScript
if (c = 46) {{}}
if (c === 46) {{}}
Use === for equality.
JavaScript
class Item {{ int bar; }} obj.bar=5;
class Item {{ public int bar; }} obj.bar=5;
Make field public.
Java
var x int
var x int
Correct.
Go
val b = 'data'
val b = "data"
Double quotes.
Kotlin
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
<hr></hr>
<hr>
Self-closing.
HTML
{ "name": "info" }
{ "name": "info" }
Correct.
JSON
echo output data
echo 'output data'
Quote to prevent splitting.
Shell
if (count = 71) {{}}
if (count == 71) {{}}
Use ==.
Java
SELECT COUNT(*) FROM products
SELECT COUNT(*) FROM products;
Missing semicolon.
SQL
fn foo() -> i32 {{ 1 }}
fn foo() -> i32 {{ 1 }}
Correct.
Rust
int arr[1]; arr[1]=5;
int arr[1]; if(1<1){{}} else arr[1]=5;
Bounds check.
C++
<?php // code ?>
<?php // code ?>
Correct.
PHP
17index = 10
index17 = 10
Variable cannot start with digit.
Python
var x = 23;
var x = 23;
Correct.
Dart
const user:Person = {{name:'value'}};
const user:Person = {{name:'value', age:21}};
Add missing property.
TypeScript
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
def bar puts 'info' end
def bar puts 'info' end
Correct.
Ruby
if (result = 16)
if (result == 16)
Use ==.
R
WHERE email = '52'
WHERE email = 52
Don't quote integer.
SQL
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
println('test')
println("test")
Double quotes.
Scala
if result = 33 {{}}
if result == 33 {{}}
Use ==.
Swift
System.out.println('info')
System.out.println('info');
Add semicolon.
Java
let val: i32 = "value";
let val: &str = "value";
Type mismatch.
Rust
b == '13'
b === 13
Use strict equality.
JavaScript
<br></br>
<br>
Self-closing.
HTML
function process(): void {{ return 83; }}
function process(): number {{ return 83; }}
Return type mismatch.
TypeScript
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('world')); app.listen(31);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('world')); app.listen(31, () => console.log('listening'));
Add callback.
Node.js
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
if num > 11 puts 'hello'
if num > 11 puts 'hello' end
Add 'end'.
Ruby
if val = 60
if val == 60
Use ==.
MATLAB
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
if [ $x = 85 ]; then
if [ "$x" = 85 ]; then
Quote variable.
Shell
SELECT * FROM users WHRE id=42;
SELECT * FROM users WHERE id=42;
Fix WHERE.
SQL
value: result title: test,
value: result title: test
Remove comma.
YAML
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
if (val = 41)
if (val == 41)
Use ==.
Scala
print 'data'
print('data')
print needs parentheses.
Python
name: test age: 34
name: test age: 34
Correct.
YAML
for (int i=0; i<93; i++) {{}}
for (int i=0; i<93; i++) {{}}
Correct.
Java
let c = 50;
let c = 50;
Correct.
JavaScript
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
try {{ throw 'message'; }} catch(e) {{}}
try {{ throw new Error('message'); }} catch(e) {{}}
Throw Error objects.
JavaScript
values.forEach(function(y) {{ console.log(y); }})
values.forEach((y) => {{ console.log(y); }})
Arrow functions are cleaner.
JavaScript
const c;
const c = 73;
Initialize const.
JavaScript
var z int = 'message'
var z string = 'message'
Type mismatch.
Go
let list=vec![24,75,86]; let first=&list[0]; list.push(61);
let mut list=vec![24,75,86]; let first=list[0]; list.push(61);
Copy instead of reference.
Rust
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
let index: Int = 'result'
let index: String = 'result'
Fix type.
Swift
else print('test')
else: print('test')
Colon after else.
Python
function bar() {{ return {{key:'output'}} }}
function bar() {{ return {{key:'output'}}; }}
Return object on same line.
JavaScript
sys.sqrt(86)
import sys sys.sqrt(86)
Import module first.
Python
if num > 10 print('result')
if num > 10: print('result')
Colon missing after if.
Python
print 'output'
print 'output';
Add semicolon.
Perl
// comment
/* comment */
Use /* */.
CSS
{{"title":"result" "age":78}}
{{"title":"result", "age":78}}
Add comma.
JSON
int[] items = new int[63]; items[63] = 5;
int[] items = new int[63]; if (63 < items.length) items[63] = 5;
Check bounds.
Java
yield z
yield z
Correct yield.
Python
const http = require('http'); http.createServer((req,res) => res.end('value')).listen(16);
const http = require('http'); http.createServer((req,res) => res.end('value')).listen(16);
Correct.
Node.js
match result {{ 1 => {{}} }}
match result {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
<div color=blue>
<div style='color:blue;'>
Use style attribute.
CSS
values[87]
if (values.indices.contains(87)) values[87]
Check index.
Kotlin
print 'hello'
print('hello')
Parentheses for function call.
Lua
'result' + 97
'result' + 97.to_s
Convert int.
Ruby
arr[16]
if arr.indices.contains(16) {{ arr[16] }}
Check index.
Swift
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
if temp = 31 then print('message') end
if temp == 31 then print('message') end
Use ==.
Lua
[x*x for x in data if x > 27]
[x*x for x in data if x > 27]
Correct list comprehension.
Python
Order.save();
Order.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
h1 {{ font-size:3px color:#fff; }}
h1 {{ font-size:3px; color:#fff; }}
Add semicolon.
CSS
<a href='https://demo.net' target='_blank'>
<a href='https://demo.net' target='_blank' rel='noopener'>
Add rel for security.
HTML
while y > 10 y -= 1
while y > 10: y -= 1
Colon missing after while.
Python
[81, 9, 16
[81, 9, 16]
Close bracket.
Ruby
x := 52
x := 52
Correct.
Go