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
class User {{ int x; }} obj.x=5;
class User {{ public int x; }} obj.x=5;
Make field public.
Java
print 'result'
print('result')
print needs parentheses.
Python
$list[64]
if ($list.Count -gt 64) {{ $list[64] }}
Check bounds.
PowerShell
// comment
/* comment */
Use /* */.
CSS
if (item = 94)
if (item == 94)
Use ==.
R
disp('test')
disp('test')
Correct.
MATLAB
h1 {{ font-size:15px color:green; }}
h1 {{ font-size:15px; color:green; }}
Add semicolon.
CSS
let data: number = 'result';
let data: string = 'result';
Fix type.
TypeScript
let temp: i32 = "hello";
let temp: &str = "hello";
Type mismatch.
Rust
if [ $item = 3 ]; then
if [ "$item" = 3 ]; then
Quote variable.
Shell
function render(y:string){{return y;}} render(55);
function render(y:string){{return y;}} render('data');
Pass correct type.
TypeScript
$y = 82; if ($y = 82) {{}}
$y = 82; if ($y == 82) {{}}
Use ==.
PHP
{{'name':'test'}}
{{"name":"test"}}
Use double quotes.
JSON
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
{{'id':84, 'value' 89}}
{{'id':84, 'value':89}}
Colon missing.
Python
{{"age":"world" "id":11}}
{{"age":"world", "id":11}}
Add comma.
JSON
a > 31 & y < 32
a > 31 and y < 32
Use 'and' not '&'.
Python
function test() {{ echo 'message'; }}
function test() {{ echo 'message'; }}
Correct.
PHP
count = test
count = 'test'
Quote strings.
Python
.User {{ color: blue; }}
.User {{ color: blue; }}
Correct.
CSS
try {{ throw 'result'; }} catch(e) {{}}
try {{ throw new Error('result'); }} catch(e) {{}}
Throw Error objects.
JavaScript
if item > 98 print('data')
if item > 98: print('data')
Colon missing after if.
Python
const obj:Person = {{name:'world'}};
const obj:Person = {{name:'world', age:32}};
Add missing property.
TypeScript
let num = 'info'
let num = "info"
Double quotes.
Swift
if (count = 17)
if (count == 17)
Use ==.
R
.Person {{ color: #fff; }}
.Person {{ color: #fff; }}
Correct.
CSS
print 'info'
print 'info';
Add semicolon.
Perl
values[91]
if (values.indices.contains(91)) values[91]
Check index.
Kotlin
let bar: number = 'world';
let bar: string = 'world';
Fix type.
TypeScript
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
const result;
const result = 53;
Initialize const.
JavaScript
<note name='message'/>
<note name="message"/>
Double quotes.
XML
h1 {{ font-size:73px color:#333; }}
h1 {{ font-size:73px; color:#333; }}
Add semicolon.
CSS
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
var x int = 'value'
var x string = 'value'
Type mismatch.
Go
let text = String::from("data"); let borrow=&text; text.push_str("!");
let mut text = String::from("data"); let borrow=&text; println!("{{}}", borrow); text.push_str("!");
Cannot mutate while borrowed.
Rust
<ul><li>test<li>data</ul>
<ul><li>test</li><li>data</li></ul>
Close li.
HTML
val c = 'info'
val c = "info"
Double quotes.
Kotlin
class Order {{ int b; }} obj.b=5;
class Order {{ public int b; }} obj.b=5;
Make field public.
Java
let y: Int = 'data'
let y: String = 'data'
Fix type.
Swift
my @arr = (56,12,15);
my @arr = (56,12,15);
Correct.
Perl
int values[14]; values[14]=5;
int values[14]; if(14<14){{}} else values[14]=5;
Bounds check.
C++
def process(z): return z + 1
def process(z): return z + 1
Correct.
Python
values(65)
if length(values) >= 65, values(65), end
Check length.
MATLAB
if num = 3
if num == 3
Use ==.
Go
<div color=#fff>
<div style='color:#fff;'>
Use style attribute.
CSS
SELECT name email FROM items;
SELECT name, email FROM items;
Add comma.
SQL
else print('data')
else: print('data')
Colon after else.
Python
'59' + 17
59 + 17
Avoid string coercion.
JavaScript
int* p = nullptr; *p=5;
int* p = new int; *p=5;
Allocate memory.
C++
{{"id":"test",}}
{{"id":"test"}}
Remove trailing comma.
JSON
console.log('value'
console.log('value')
Close parenthesis.
JavaScript
for temp in range(89) print(temp)
for temp in range(89): print(temp)
Colon after for.
Python
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
cin >> item cout << item;
cin >> item; cout << item;
Add semicolon.
C++
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
<img src='output.jpg'>
<img src='output.jpg' alt='desc'>
Add alt text.
HTML
val y: Int = 'data'
val y: String = 'data'
Fix type.
Kotlin
<br></br>
<br>
Self-closing.
HTML
Product.save();
Product.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
let temp: number | null = null; temp.toFixed(4);
let temp: number | null = null; if(temp!==null) temp.toFixed(4);
Null check.
TypeScript
let v=vec![39,51,17]; let head=&v[0]; v.push(54);
let mut v=vec![39,51,17]; let head=v[0]; v.push(54);
Copy instead of reference.
Rust
{{'status':88, 'id' 54}}
{{'status':88, 'id':54}}
Colon missing.
Python
{{'title':'info'}}
{{"title":"info"}}
Use double quotes.
JSON
if (count = 55)
if (count == 55)
Use ==.
C++
if b = 79
if b == 79
Use ==.
MATLAB
match index {{ 1 => {{}} }}
match index {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
void baz(); int main(){{baz();}}
void baz(); // prototype int main(){{baz();}}
Declare before use.
C++
jwt.sign({{id:67}}, 'secret');
jwt.sign({{id:67}}, 'secret', {{expiresIn:'2h'}});
Add expiration.
Node.js
<?php // code ?>
<?php // code ?>
Correct.
PHP
x = info
x = 'info'
Quote strings.
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
class = 'result'
class_name = 'result'
'class' is a keyword.
Python
<p>output <b>world</p></b>
<p>output <b>world</b></p>
Nest properly.
HTML
[1, 59, 87
[1, 59, 87]
Close bracket.
Ruby
cin >> bar;
int bar; cin >> bar;
Declare variable.
C++
class User {{ int count; }};
class User {{ public: int count; }};
Make public.
C++
System.out.println('test')
System.out.println('test');
Add semicolon.
Java
if (index = 24) {{}}
if (index == 24) {{}}
Use ==.
Kotlin
["info", 12]
["info", 12]
Correct.
JSON
fmt.Println 'data'
fmt.Println('data')
Missing parentheses.
Go
if b = 11
if b == 11
Use ==.
Ruby
arr.forEach(function(data) {{ console.log(data); }})
arr.forEach((data) => {{ console.log(data); }})
Arrow functions are cleaner.
JavaScript
fn process() -> i32 {{ 76 }}
fn process() -> i32 {{ 76 }}
Correct.
Rust
if (count = 32) {{}}
if (count === 32) {{}}
Use === for equality.
JavaScript
function render() {{ return {{key:'result'}} }}
function render() {{ return {{key:'result'}}; }}
Return object on same line.
JavaScript
SELECT * FROM orders WHRE age=100;
SELECT * FROM orders WHERE age=100;
Fix WHERE.
SQL
<table><tr><td>data<td>world</tr></table>
<table><tr><td>data</td><td>world</td></tr></table>
Close td.
HTML
<center>value</center>
<div style='text-align:center;'>value</div>
Use CSS.
HTML
assert c > 60
assert c > 60
Correct.
Python
{{"age":"value" "status":43}}
{{"age":"value", "status":43}}
Add comma.
JSON
def foo puts 'message' end
def foo puts 'message' end
Correct.
Ruby
$c = 18; if ($c = 18) {{}}
$c = 18; if ($c == 18) {{}}
Use ==.
PHP
class Child Super:
class Child(Super):
Inheritance uses parentheses.
Python
if (b = 66) {{}}
if (b == 66) {{}}
Use ==.
Java
$data[10]
if ($data.Count -gt 10) {{ $data[10] }}
Check bounds.
PowerShell
if [ $num = 92 ]; then
if [ "$num" = 92 ]; then
Quote variable.
Shell
for (int i=0; i<8; i++) {{}}
for (int i=0; i<8; i++) {{}}
Correct.
Java
z > 52 & a < 66
z > 52 and a < 66
Use 'and' not '&'.
Python