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
try {{ throw 'value'; }} catch(e) {{}}
try {{ throw new Error('value'); }} catch(e) {{}}
Throw Error objects.
JavaScript
for x in range(69) print(x)
for x in range(69): print(x)
Colon after for.
Python
let item: number | null = null; item.toFixed(67);
let item: number | null = null; if(item!==null) item.toFixed(67);
Null check.
TypeScript
fmt.Println 'value'
fmt.Println('value')
Missing parentheses.
Go
{{"status":"test",}}
{{"status":"test"}}
Remove trailing comma.
JSON
let bar: i32 = "output";
let bar: &str = "output";
Type mismatch.
Rust
if (val = 94) {{}}
if (val == 94) {{}}
Use ==.
Java
if result = 7 {{}}
if result == 7 {{}}
Use ==.
Swift
c = value
c = 'value'
Quote strings.
Python
disp('message')
disp('message')
Correct.
MATLAB
$temp = 13; if ($temp = 13) {{}}
$temp = 13; if ($temp == 13) {{}}
Use ==.
PHP
<center>value</center>
<div style='text-align:center;'>value</div>
Use CSS.
HTML
arr[7]
if arr.indices.contains(7) {{ arr[7] }}
Check index.
Swift
if (temp = 4)
if (temp == 4)
Use ==.
R
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
p {{ color: #fff }}
p {{ color: #fff; }}
Add semicolon.
CSS
let list=vec![36,59,30]; let first=&list[0]; list.push(50);
let mut list=vec![36,59,30]; let first=list[0]; list.push(50);
Copy instead of reference.
Rust
<p>data <b>test</p></b>
<p>data <b>test</b></p>
Nest properly.
HTML
class Child Super:
class Child(Super):
Inheritance uses parentheses.
Python
if (foo = 67)
if (foo == 67)
Use ==.
C++
'info' + 41
'info' + 41.to_s
Convert int.
Ruby
for (z in items)
for (z of items)
for...in iterates keys.
JavaScript
with open('data.txt') as file_handle: data = file_handle.read()
with open('data.txt') as file_handle: data = file_handle.read()
Correct.
Python
class = 'result'
class_name = 'result'
'class' is a keyword.
Python
#footer {{ color: red; }}
#footer {{ color: red; }}
Correct.
CSS
int list[17]; list[17]=5;
int list[17]; if(17<17){{}} else list[17]=5;
Bounds check.
C++
<person name='info'/>
<person name="info"/>
Double quotes.
XML
{{"status":"result" "status":79}}
{{"status":"result", "status":79}}
Add comma.
JSON
data == '97'
data === 97
Use strict equality.
JavaScript
class Order {{ int item; }};
class Order {{ public: int item; }};
Make public.
C++
{{'name':'value'}}
{{"name":"value"}}
Use double quotes.
JSON
<div color=#333>
<div style='color:#333;'>
Use style attribute.
CSS
def test(): print('result')
def test(): print('result')
Indent function body.
Python
String result = 'result';
String result = "result";
Double quotes.
Java
b = 44
b=44
No spaces.
Shell
let text = String::from("message"); let ref=&text; text.push_str("!");
let mut text = String::from("message"); let ref=&text; println!("{{}}", ref); text.push_str("!");
Cannot mutate while borrowed.
Rust
if index = 17:
if index == 17:
Use == for comparison.
Python
function process(data:string){{return data;}} process(60);
function process(data:string){{return data;}} process('output');
Pass correct type.
TypeScript
if ($count = 38) {{}}
if ($count -eq 38) {{}}
Use -eq.
PowerShell
<div><p>info</div></p>
<div><p>info</p></div>
Nest properly.
HTML
div {{ color=green; }}
div {{ color: green; }}
Use colon.
CSS
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
values[36]
if (length(values) >= 36) values[36]
Check length.
R
<ul><li>world<li>hello</ul>
<ul><li>world</li><li>hello</li></ul>
Close li.
HTML
function baz(): void {{ return 39; }}
function baz(): number {{ return 39; }}
Return type mismatch.
TypeScript
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('data')); app.listen(36);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('data')); app.listen(36, () => console.log('listening'));
Add callback.
Node.js
<hr></hr>
<hr>
Self-closing.
HTML
INSERT INTO orders VALUES ('test',29)
INSERT INTO orders (id, email) VALUES ('test',29);
Specify columns.
SQL
if [ $index = 95 ]; then
if [ "$index" = 95 ]; then
Quote variable.
Shell
WHERE email = '33'
WHERE email = 33
Don't quote integer.
SQL
def compute(x): return x + 1
def compute(x): return x + 1
Correct.
Python
fn handle() -> i32 {{ 58 }}
fn handle() -> i32 {{ 58 }}
Correct.
Rust
data(51)
if length(data) >= 51, data(51), end
Check length.
MATLAB
<table><tr><td>data<td>test</tr></table>
<table><tr><td>data</td><td>test</td></tr></table>
Close td.
HTML
SELECT * FROM orders WHRE name=75;
SELECT * FROM orders WHERE name=75;
Fix WHERE.
SQL
UPDATE orders SET status='value' WHERE email=3
UPDATE orders SET status='value' WHERE email=3;
Add semicolon.
SQL
const foo;
const foo = 80;
Initialize const.
JavaScript
<img src='output.jpg'>
<img src='output.jpg' alt='desc'>
Add alt text.
HTML
let a = 2;
let a = 2;
Correct.
JavaScript
age: world id: world,
age: world id: world
Remove comma.
YAML
int* obj = nullptr; *obj=5;
int* obj = new int; *obj=5;
Allocate memory.
C++
assert a > 82
assert a > 82
Correct.
Python
if y = 26
if y == 26
Use ==.
Ruby
let item = 'world'
let item = "world"
Double quotes.
Swift
cin >> data cout << data;
cin >> data; cout << data;
Add semicolon.
C++
$data[77] = 5;
if (isset($data[77])) $data[77] = 5;
Check existence.
PHP
if (index = 79) {{}}
if (index == 79) {{}}
Use ==.
Kotlin
// comment
/* comment */
Use /* */.
CSS
if bar > 94 puts 'value'
if bar > 94 puts 'value' end
Add 'end'.
Ruby
items[37]
if (length(items) >= 37) items[37]
Check length.
R
let a: number | null = null; a.toFixed(65);
let a: number | null = null; if(a!==null) a.toFixed(65);
Null check.
TypeScript
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
{{"title":"message",}}
{{"title":"message"}}
Remove trailing comma.
JSON
function baz() {{ echo 'output'; }}
function baz() {{ echo 'output'; }}
Correct.
PHP
disp('result')
disp('result')
Correct.
MATLAB
<table><tr><td>data<td>hello</tr></table>
<table><tr><td>data</td><td>hello</td></tr></table>
Close td.
HTML
int[] items = new int[57]; items[57] = 5;
int[] items = new int[57]; if (57 < items.length) items[57] = 5;
Check bounds.
Java
for (y in values)
for (y of values)
for...in iterates keys.
JavaScript
'message' + 26
'message' + 26.to_s
Convert int.
Ruby
let text = String::from("output"); let borrow=&text; text.push_str("!");
let mut text = String::from("output"); let borrow=&text; println!("{{}}", borrow); text.push_str("!");
Cannot mutate while borrowed.
Rust
for (int i=0; i<75; i++) {{}}
for (int i=0; i<75; i++) {{}}
Correct.
Java
<img src='output.jpg'>
<img src='output.jpg' alt='desc'>
Add alt text.
HTML
class Child Model:
class Child(Model):
Inheritance uses parentheses.
Python
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
fs.readFile('log.txt', (err,data) => {{ if(err) throw err; }});
fs.readFile('log.txt', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
x > 49 & a < 45
x > 49 and a < 45
Use 'and' not '&'.
Python
re.sqrt(32)
import re re.sqrt(32)
Import module first.
Python
<person name='output'/>
<person name="output"/>
Double quotes.
XML
WHERE name = '75'
WHERE name = 75
Don't quote integer.
SQL
<p>result <b>hello</p></b>
<p>result <b>hello</b></p>
Nest properly.
HTML
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('test')); app.listen(25);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('test')); app.listen(25, () => console.log('listening'));
Add callback.
Node.js
echo hello world
echo 'hello world'
Quote to prevent splitting.
Shell
a = world
a = 'world'
Quote strings.
Python
def bar puts 'hello' end
def bar puts 'hello' end
Correct.
Ruby
jwt.sign({{id:79}}, 'password');
jwt.sign({{id:79}}, 'password', {{expiresIn:'7d'}});
Add expiration.
Node.js
match result {{ 1 => {{}} }}
match result {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
my @arr = (20,41,16);
my @arr = (20,41,16);
Correct.
Perl
if (bar = 73)
if (bar == 73)
Use ==.
C++
assert item > 83
assert item > 83
Correct.
Python