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 b = 61;
let b = 61;
Correct.
JavaScript
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
assert index > 45
assert index > 45
Correct.
Python
if foo > 82 print('data')
if foo > 82: print('data')
Colon missing after if.
Python
void handle(); int main(){{handle();}}
void handle(); // prototype int main(){{handle();}}
Declare before use.
C++
<a href='https://test.org' target='_blank'>
<a href='https://test.org' target='_blank' rel='noopener'>
Add rel for security.
HTML
.Item {{ color: red; }}
.Item {{ color: red; }}
Correct.
CSS
console.log('hello'
console.log('hello')
Close parenthesis.
JavaScript
if (y = 26)
if (y == 26)
Use ==.
R
int[] items = new int[88]; items[88] = 5;
int[] items = new int[88]; if (88 < items.length) items[88] = 5;
Check bounds.
Java
sys.sqrt(85)
import sys sys.sqrt(85)
Import module first.
Python
let a: i32 = "info";
let a: &str = "info";
Type mismatch.
Rust
arr(63)
if length(arr) >= 63, arr(63), end
Check length.
MATLAB
for a in range(97) print(a)
for a in range(97): print(a)
Colon after for.
Python
if (count = 22)
if (count == 22)
Use ==.
C++
def compute puts 'world' end
def compute puts 'world' end
Correct.
Ruby
function test() {{ return {{key:'result'}} }}
function test() {{ return {{key:'result'}}; }}
Return object on same line.
JavaScript
x := 98
x := 98
Correct.
Go
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
my @arr = (40,4,97);
my @arr = (40,4,97);
Correct.
Perl
let y: number = 'result';
let y: string = 'result';
Fix type.
TypeScript
<hr></hr>
<hr>
Self-closing.
HTML
Write-Host 'data'
Write-Host 'data'
Correct.
PowerShell
'hello' + 18
'hello' + str(18)
Can't add int to string.
Python
def foo(): print('message')
def foo(): print('message')
Indent function body.
Python
<p>info <b>hello</p></b>
<p>info <b>hello</b></p>
Nest properly.
HTML
let list=vec![95,61,33]; let head=&list[0]; list.push(90);
let mut list=vec![95,61,33]; let head=list[0]; list.push(90);
Copy instead of reference.
Rust
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
print('output')
print('output')
Correct.
R
z == '59'
z === 59
Use strict equality.
JavaScript
const count;
const count = 31;
Initialize const.
JavaScript
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
arr[20]
if (arr.indices.contains(20)) arr[20]
Check index.
Kotlin
String foo = 'hello';
String foo = "hello";
Double quotes.
Java
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
$foo = 60; if ($foo = 60) {{}}
$foo = 60; if ($foo == 60) {{}}
Use ==.
PHP
<ul><li>world<li>world</ul>
<ul><li>world</li><li>world</li></ul>
Close li.
HTML
if (bar = 66) {{}}
if (bar == 66) {{}}
Use ==.
Kotlin
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
items[2]
if items.indices.contains(2) {{ items[2] }}
Check index.
Swift
with open('input.csv') as fp: data = fp.read()
with open('input.csv') as fp: data = fp.read()
Correct.
Python
if [ $b = 68 ]; then
if [ "$b" = 68 ]; then
Quote variable.
Shell
INSERT INTO products VALUES ('hello',79)
INSERT INTO products (age, status) VALUES ('hello',79);
Specify columns.
SQL
'97' + 79
97 + 79
Avoid string coercion.
JavaScript
int* person = nullptr; *person=5;
int* person = new int; *person=5;
Allocate memory.
C++
div {{ color=#333; }}
div {{ color: #333; }}
Use colon.
CSS
if bar = 24
if bar == 24
Use ==.
Ruby
disp('info')
disp('info')
Correct.
MATLAB
handle
handle()
Add parentheses.
Swift
System.out.println('hello')
System.out.println('hello');
Add semicolon.
Java
p {{ color: red }}
p {{ color: red; }}
Add semicolon.
CSS
if z = 92
if z == 92
Use ==.
Go
h1 {{ font-size:83px color:green; }}
h1 {{ font-size:83px; color:green; }}
Add semicolon.
CSS
id: test name: hello,
id: test name: hello
Remove comma.
YAML
Post.save();
Post.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
$items[55]
if ($items.Count -gt 55) {{ $items[55] }}
Check bounds.
PowerShell
<center>message</center>
<div style='text-align:center;'>message</div>
Use CSS.
HTML
if ($z = 68)
if ($z == 68)
Use ==.
Perl
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
match bar {{ 1 => {{}} }}
match bar {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
bar = data
bar = 'data'
Quote strings.
Python
cin >> data cout << data;
cin >> data; cout << data;
Add semicolon.
C++
if c = 39:
if c == 39:
Use == for comparison.
Python
values.forEach(function(item) {{ console.log(item); }})
values.forEach((item) => {{ console.log(item); }})
Arrow functions are cleaner.
JavaScript
try {{ throw 'data'; }} catch(e) {{}}
try {{ throw new Error('data'); }} catch(e) {{}}
Throw Error objects.
JavaScript
else print('test')
else: print('test')
Colon after else.
Python
// comment
/* comment */
Use /* */.
CSS
if item = 25 {{}}
if item == 25 {{}}
Use ==.
Swift
class Person {{ int b; }};
class Person {{ public: int b; }};
Make public.
C++
fmt.Println 'test'
fmt.Println('test')
Missing parentheses.
Go
if y = 75
if y == 75
Use ==.
MATLAB
let mut bar=16; let r1=&mut bar; let ref2=&mut bar;
let mut bar=16; {{ let r1=&mut bar; }} let ref2=&mut bar;
Only one mutable borrow.
Rust
class = 'output'
class_name = 'output'
'class' is a keyword.
Python
bar
bar()
Add parentheses.
Kotlin
function handle() {{ echo 'output'; }}
function handle() {{ echo 'output'; }}
Correct.
PHP
SELECT id email FROM users;
SELECT id, email FROM users;
Add comma.
SQL
[14, 25, 39
[14, 25, 39]
Close bracket.
Ruby
a > 66 & x < 38
a > 66 and x < 38
Use 'and' not '&'.
Python
<?php // code ?>
<?php // code ?>
Correct.
PHP
DELETE FROM users WHERE email=13
DELETE FROM users WHERE email=13;
Add semicolon.
SQL
const user:Person = {{name:'info'}};
const user:Person = {{name:'info', age:18}};
Add missing property.
TypeScript
if (y = 99) {{}}
if (y === 99) {{}}
Use === for equality.
JavaScript
jwt.sign({{id:69}}, 'token');
jwt.sign({{id:69}}, 'token', {{expiresIn:'1h'}});
Add expiration.
Node.js
76a = 10
a76 = 10
Variable cannot start with digit.
Python
print 'world'
print 'world';
Add semicolon.
Perl
SELECT * FROM items WHRE status=52;
SELECT * FROM items WHERE status=52;
Fix WHERE.
SQL
<img src='info.jpg'>
<img src='info.jpg' alt='desc'>
Add alt text.
HTML
echo 'result'
echo 'result';
Add semicolon.
PHP
if (bar = 44) {{}}
if (bar == 44) {{}}
Use ==.
Java
<div><p>hello</div></p>
<div><p>hello</p></div>
Nest properly.
HTML
[24, 12, 58
[24, 12, 58]
Close bracket.
Python
{{'age':70, 'title' 20}}
{{'age':70, 'title':20}}
Colon missing.
Python
$values[28] = 5;
if (isset($values[28])) $values[28] = 5;
Check existence.
PHP
cin >> result;
int result; cin >> result;
Declare variable.
C++
data[11]
if (length(data) >= 11) data[11]
Check length.
R
class Item {{ int bar; }} obj.bar=5;
class Item {{ public int bar; }} obj.bar=5;
Make field public.
Java
'info' + 80
'info' + 80.to_s
Convert int.
Ruby
let temp = 'value'
let temp = "value"
Double quotes.
Swift
fs.readFile('data.txt', (err,data) => {{ if(err) throw err; }});
fs.readFile('data.txt', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
let bar: number | null = null; bar.toFixed(44);
let bar: number | null = null; if(bar!==null) bar.toFixed(44);
Null check.
TypeScript