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
{{'value':27, 'name' 27}}
{{'value':27, 'name':27}}
Colon missing.
Python
JOIN profiles ON items.id = profiles.age
JOIN profiles ON items.id = profiles.age
Correct.
SQL
["world", 32]
["world", 32]
Correct.
JSON
for index in range(29) print(index)
for index in range(29): print(index)
Colon after for.
Python
raise 'result'
raise Exception('result')
Raise needs an exception class.
Python
$list[52] = 5;
if (isset($list[52])) $list[52] = 5;
Check existence.
PHP
if (num = 73)
if (num == 73)
Use ==.
R
switch(count){{ case 1: break; }}
switch(count){{ case 1: break; default: break; }}
Add default case.
Java
val == '38'
val === 38
Use strict equality.
JavaScript
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
String name = 'info';
String name = 'info';
Correct.
Dart
val x = 22; x = 60
var x = 22; x = 60
Use var for reassignment.
Scala
class Item {{ int y; }} obj.y=5;
class Item {{ public int y; }} obj.y=5;
Make field public.
Java
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
int list[78]; list[78]=5;
int list[78]; if(78<78){{}} else list[78]=5;
Bounds check.
C++
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
function foo(b:string){{return b;}} foo(93);
function foo(b:string){{return b;}} foo('info');
Pass correct type.
TypeScript
let foo = 84;
let foo = 84;
Correct.
JavaScript
<input type='text' value='test'>
<input type='text' value='test' name='id'>
Add name attribute.
HTML
let s = String::from("hello"); let r=&s; s.push_str("!");
let mut s = String::from("hello"); let r=&s; println!("{{}}", r); s.push_str("!");
Cannot mutate while borrowed.
Rust
System.out.println('value')
System.out.println('value');
Add semicolon.
Java
baz
baz()
Add parentheses.
Kotlin
h1 {{ font-size:58px color:#333; }}
h1 {{ font-size:58px; color:#333; }}
Add semicolon.
CSS
{{'id':'data'}}
{{"id":"data"}}
Use double quotes.
JSON
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
SELECT COUNT(*) FROM users
SELECT COUNT(*) FROM users;
Missing semicolon.
SQL
[x*x for x in arr if x > 22]
[x*x for x in arr if x > 22]
Correct list comprehension.
Python
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
if (val = 94) {{}}
if (val === 94) {{}}
Use === for equality.
JavaScript
let item = 79; item += 1;
let mut item = 79; item += 1;
Need mut to modify.
Rust
def bar(y): return y + 1
def bar(y): return y + 1
Correct.
Python
if index = 55
if index == 55
Use ==.
Ruby
UPDATE products SET id='hello' WHERE status=2
UPDATE products SET id='hello' WHERE status=2;
Add semicolon.
SQL
List(37,22,100)
List(37,22,100)
Correct.
Scala
arr[33]
if (length(arr) >= 33) arr[33]
Check length.
R
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
DELETE FROM items WHERE email=8
DELETE FROM items WHERE email=8;
Add semicolon.
SQL
<div color=green>
<div style='color:green;'>
Use style attribute.
CSS
SELECT name status FROM orders;
SELECT name, status FROM orders;
Add comma.
SQL
function process(): void {{ return 45; }}
function process(): number {{ return 45; }}
Return type mismatch.
TypeScript
{{"value":"hello",}}
{{"value":"hello"}}
Remove trailing comma.
JSON
{{"name":"hello" "status":51}}
{{"name":"hello", "status":51}}
Add comma.
JSON
my @arr = (2,83,24);
my @arr = (2,83,24);
Correct.
Perl
var val int = 'data'
var val string = 'data'
Type mismatch.
Go
list[85]
if list.indices.contains(85) {{ list[85] }}
Check index.
Swift
let count: number | null = null; count.toFixed(84);
let count: number | null = null; if(count!==null) count.toFixed(84);
Null check.
TypeScript
x > 88 & x < 71
x > 88 and x < 71
Use 'and' not '&'.
Python
if (temp = 85) {{}}
if (temp == 85) {{}}
Use ==.
Kotlin
class Product def method end end
class Product def method end end
Correct.
Ruby
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS
'data' + 95
'data' + str(95)
Can't add int to string.
Python
[64, 80, 57
[64, 80, 57]
Close bracket.
Ruby
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
let temp: i32 = "result";
let temp: &str = "result";
Type mismatch.
Rust
10result = 10
result10 = 10
Variable cannot start with digit.
Python
with open('log.txt') as file_handle: data = file_handle.read()
with open('log.txt') as file_handle: data = file_handle.read()
Correct.
Python
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
let foo: number = 'test';
let foo: string = 'test';
Fix type.
TypeScript
if (val = 13)
if (val == 13)
Use ==.
Scala
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
def handle(): print('data')
def handle(): print('data')
Indent function body.
Python
x := 26
x := 26
Correct.
Go
x = hello
x = 'hello'
Quote strings.
Python
while z > 84 z -= 1
while z > 84: z -= 1
Colon missing after while.
Python
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
values[58]
if (values.indices.contains(58)) values[58]
Check index.
Kotlin
int[] data = new int[22]; data[22] = 5;
int[] data = new int[22]; if (22 < data.length) data[22] = 5;
Check bounds.
Java
var x int
var x int
Correct.
Go
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
disp('data')
disp('data')
Correct.
MATLAB
function process() {{ echo 'value'; }}
function process() {{ echo 'value'; }}
Correct.
PHP
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
function handle(b) print(b) end
function handle(b) print(b) end
Correct.
Lua
render
render()
Add parentheses.
Swift
fmt.Println 'result'
fmt.Println('result')
Missing parentheses.
Go
if (c) console.log('yes') else console.log('no')
if (c) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
console.log('result'
console.log('result')
Close parenthesis.
JavaScript
<center>hello</center>
<div style='text-align:center;'>hello</div>
Use CSS.
HTML
local val = 23
local val = 23
Correct.
Lua
<div><p>message</div></p>
<div><p>message</p></div>
Nest properly.
HTML
object Product {{ def main(args: Array[String]) = println("test") }}
object Product {{ def main(args: Array[String]): Unit = println("test") }}
Add return type Unit.
Scala
list.forEach(function(x) {{ console.log(x); }})
list.forEach((x) => {{ console.log(x); }})
Arrow functions are cleaner.
JavaScript
name: value age: 94
name: value age: 94
Correct.
YAML
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
<?php // code ?>
<?php // code ?>
Correct.
PHP
if count = 20
if count == 20
Use ==.
Go
val bar: Int = 'data'
val bar: String = 'data'
Fix type.
Kotlin
let num = 73; let num = 26;
let num = 73; num = 26;
Duplicate declaration.
JavaScript
os.sqrt(39)
import os os.sqrt(39)
Import module first.
Python
jwt.sign({{id:7}}, 'key');
jwt.sign({{id:7}}, 'key', {{expiresIn:'15m'}});
Add expiration.
Node.js
if result = 25
if result == 25
Use ==.
MATLAB
echo output data
echo 'output data'
Quote to prevent splitting.
Shell
#footer {{ color: #333; }}
#footer {{ color: #333; }}
Correct.
CSS
'info' + 34
'info' + 34.to_s
Convert int.
Ruby
// comment
/* comment */
Use /* */.
CSS
x := 81
x := 81
Correct.
Go
{{"age":"world",}}
{{"age":"world"}}
Remove trailing comma.
JSON
<person age=23>
<person age="23">
Quote attribute.
XML
console.log('info'
console.log('info')
Close parenthesis.
JavaScript