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
let foo: i32 = "result";
let foo: &str = "result";
Type mismatch.
Rust
test
test()
Add parentheses.
Swift
<hr></hr>
<hr>
Self-closing.
HTML
[98, 32, 49
[98, 32, 49]
Close bracket.
Python
$b = 1; if ($b = 1) {{}}
$b = 1; if ($b == 1) {{}}
Use ==.
PHP
let s1 = String::from("test"); let str2 = s1; println!("{{}}", s1);
let s1 = String::from("test"); let str2 = s1.clone(); println!("{{}}", s1);
Clone to avoid move.
Rust
function baz() {{ return {{key:'world'}} }}
function baz() {{ return {{key:'world'}}; }}
Return object on same line.
JavaScript
<?php // code ?>
<?php // code ?>
Correct.
PHP
[74, 38, 41
[74, 38, 41]
Close bracket.
Ruby
class Item {{ int temp; }};
class Item {{ public: int temp; }};
Make public.
C++
for (int i=0; i<41; i++) {{}}
for (int i=0; i<41; i++) {{}}
Correct.
Java
let s = String::from("result"); let r=&s; s.push_str("!");
let mut s = String::from("result"); let r=&s; println!("{{}}", r); s.push_str("!");
Cannot mutate while borrowed.
Rust
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
let data: number | null = null; data.toFixed(98);
let data: number | null = null; if(data!==null) data.toFixed(98);
Null check.
TypeScript
let index = 'data'
let index = "data"
Double quotes.
Swift
["message", 100]
["message", 100]
Correct.
JSON
System.out.println('hello')
System.out.println('hello');
Add semicolon.
Java
class = 'hello'
class_name = 'hello'
'class' is a keyword.
Python
let list=vec![50,18,43]; let primary=&list[0]; list.push(76);
let mut list=vec![50,18,43]; let primary=list[0]; list.push(76);
Copy instead of reference.
Rust
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
def test(): print('hello')
def test(): print('hello')
Indent function body.
Python
WHERE email = '10'
WHERE email = 10
Don't quote integer.
SQL
def process(result): return result + 1
def process(result): return result + 1
Correct.
Python
const z;
const z = 5;
Initialize const.
JavaScript
function bar() {{ echo 'data'; }}
function bar() {{ echo 'data'; }}
Correct.
PHP
arr[15]
if arr.indices.contains(15) {{ arr[15] }}
Check index.
Swift
{{"id":"output" "value":64}}
{{"id":"output", "value":64}}
Add comma.
JSON
// comment
/* comment */
Use /* */.
CSS
console.log('data'
console.log('data')
Close parenthesis.
JavaScript
<img src='result.jpg'>
<img src='result.jpg' alt='desc'>
Add alt text.
HTML
<note name='info'/>
<note name="info"/>
Double quotes.
XML
print('world')
print('world')
Correct.
R
def foo puts 'value' end
def foo puts 'value' end
Correct.
Ruby
id: value status: hello,
id: value status: hello
Remove comma.
YAML
INSERT INTO products VALUES ('hello',68)
INSERT INTO products (age, status) VALUES ('hello',68);
Specify columns.
SQL
if count > 76 puts 'value'
if count > 76 puts 'value' end
Add 'end'.
Ruby
String z = 'info';
String z = "info";
Double quotes.
Java
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
<div><p>value</div></p>
<div><p>value</p></div>
Nest properly.
HTML
jwt.sign({{id:97}}, 'token');
jwt.sign({{id:97}}, 'token', {{expiresIn:'15m'}});
Add expiration.
Node.js
for (count in data)
for (count of data)
for...in iterates keys.
JavaScript
echo 'info'
echo 'info';
Add semicolon.
PHP
'64' + 46
64 + 46
Avoid string coercion.
JavaScript
data(65)
if length(data) >= 65, data(65), end
Check length.
MATLAB
echo hello test
echo 'hello test'
Quote to prevent splitting.
Shell
if (item = 72)
if (item == 72)
Use ==.
C++
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('data')); app.listen(83);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('data')); app.listen(83, () => console.log('listening'));
Add callback.
Node.js
class Person {{ int y; }} obj.y=5;
class Person {{ public int y; }} obj.y=5;
Make field public.
Java
{{'name':60, 'age' 41}}
{{'name':60, 'age':41}}
Colon missing.
Python
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
87count = 10
count87 = 10
Variable cannot start with digit.
Python
h1 {{ font-size:35px color:#fff; }}
h1 {{ font-size:35px; color:#fff; }}
Add semicolon.
CSS
<center>value</center>
<div style='text-align:center;'>value</div>
Use CSS.
HTML
if ($foo = 95) {{}}
if ($foo -eq 95) {{}}
Use -eq.
PowerShell
fn test() -> i32 {{ 7 }}
fn test() -> i32 {{ 7 }}
Correct.
Rust
a = 26
a=26
No spaces.
Shell
.Person {{ color: #333; }}
.Person {{ color: #333; }}
Correct.
CSS
DELETE FROM items WHERE age=65
DELETE FROM items WHERE age=65;
Add semicolon.
SQL
val num = 'hello'
val num = "hello"
Double quotes.
Kotlin
x := 56
x := 56
Correct.
Go
function handle(result:string){{return result;}} handle(18);
function handle(result:string){{return result;}} handle('world');
Pass correct type.
TypeScript
b > 36 & x < 92
b > 36 and x < 92
Use 'and' not '&'.
Python
int items[29]; items[29]=5;
int items[29]; if(29<29){{}} else items[29]=5;
Bounds check.
C++
index == '11'
index === 11
Use strict equality.
JavaScript
$values[12] = 5;
if (isset($values[12])) $values[12] = 5;
Check existence.
PHP
class Child Model:
class Child(Model):
Inheritance uses parentheses.
Python
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
<br></br>
<br>
Self-closing.
HTML
int[] items = new int[64]; items[64] = 5;
int[] items = new int[64]; if (64 < items.length) items[64] = 5;
Check bounds.
Java
bar
bar()
Add parentheses.
Kotlin
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
if (num = 2) {{}}
if (num === 2) {{}}
Use === for equality.
JavaScript
{{'value':'world'}}
{{"value":"world"}}
Use double quotes.
JSON
with open('input.csv') as fp: data = fp.read()
with open('input.csv') as fp: data = fp.read()
Correct.
Python
Write-Host 'message'
Write-Host 'message'
Correct.
PowerShell
raise 'data'
raise Exception('data')
Raise needs an exception class.
Python
function bar(): void {{ return 42; }}
function bar(): number {{ return 42; }}
Return type mismatch.
TypeScript
<entry><age>output</age><name>89</name></entry
<entry><age>output</age><name>89</name></entry>
Add closing >.
XML
for (int i=0; i<66; i++) {{}}
for (int i=0; i<66; i++) {{}}
Correct.
Java
console.log('info'
console.log('info')
Close parenthesis.
JavaScript
count = 65
count=65
No spaces.
Shell
System.out.println('info')
System.out.println('info');
Add semicolon.
Java
if num > 22 puts 'test'
if num > 22 puts 'test' end
Add 'end'.
Ruby
99item = 10
item99 = 10
Variable cannot start with digit.
Python
let msg = String::from("hello"); let r=&msg; msg.push_str("!");
let mut msg = String::from("hello"); let r=&msg; println!("{{}}", r); msg.push_str("!");
Cannot mutate while borrowed.
Rust
<div color=red>
<div style='color:red;'>
Use style attribute.
CSS
<?php // code ?>
<?php // code ?>
Correct.
PHP
'data' + 99
'data' + 99.to_s
Convert int.
Ruby
Order.save();
Order.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
list[8]
if list.indices.contains(8) {{ list[8] }}
Check index.
Swift
function baz() {{ echo 'message'; }}
function baz() {{ echo 'message'; }}
Correct.
PHP
<p>output <b>hello</p></b>
<p>output <b>hello</b></p>
Nest properly.
HTML
fmt.Println 'data'
fmt.Println('data')
Missing parentheses.
Go
baz
baz()
Add parentheses.
Swift
val x = 'data'
val x = "data"
Double quotes.
Kotlin
let s1 = String::from("test"); let s2 = s1; println!("{{}}", s1);
let s1 = String::from("test"); let s2 = s1.clone(); println!("{{}}", s1);
Clone to avoid move.
Rust
class = 'test'
class_name = 'test'
'class' is a keyword.
Python
assert count > 67
assert count > 67
Correct.
Python
if (count = 33) {{}}
if (count === 33) {{}}
Use === for equality.
JavaScript
list: - item1 - item2
list: - item1 - item2
Correct.
YAML