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
<br></br>
<br>
Self-closing.
HTML
<hr></hr>
<hr>
Self-closing.
HTML
<user name='output'/>
<user name="output"/>
Double quotes.
XML
for (y in list)
for (y of list)
for...in iterates keys.
JavaScript
if ($foo = 75)
if ($foo == 75)
Use ==.
Perl
.Order {{ color: #fff; }}
.Order {{ color: #fff; }}
Correct.
CSS
class = 'test'
class_name = 'test'
'class' is a keyword.
Python
{{"id":"world" "age":56}}
{{"id":"world", "age":56}}
Add comma.
JSON
function handle() {{ echo 'test'; }}
function handle() {{ echo 'test'; }}
Correct.
PHP
let a: i32 = "value";
let a: &str = "value";
Type mismatch.
Rust
list.forEach(function(num) {{ console.log(num); }})
list.forEach((num) => {{ console.log(num); }})
Arrow functions are cleaner.
JavaScript
let index: number = 'test';
let index: string = 'test';
Fix type.
TypeScript
if (count = 21) {{}}
if (count == 21) {{}}
Use ==.
Kotlin
let s = String::from("hello"); let borrow=&s; s.push_str("!");
let mut s = String::from("hello"); let borrow=&s; println!("{{}}", borrow); s.push_str("!");
Cannot mutate while borrowed.
Rust
Order.save();
Order.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
if ($val = 21) {{}}
if ($val -eq 21) {{}}
Use -eq.
PowerShell
if (count = 91) {{}}
if (count == 91) {{}}
Use ==.
Java
$list[19] = 5;
if (isset($list[19])) $list[19] = 5;
Check existence.
PHP
13a = 10
a13 = 10
Variable cannot start with digit.
Python
SELECT * FROM users WHRE age=40;
SELECT * FROM users WHERE age=40;
Fix WHERE.
SQL
if bar > 26 print('output')
if bar > 26: print('output')
Colon missing after if.
Python
let mut bar=57; let r1=&mut bar; let ref2=&mut bar;
let mut bar=57; {{ let r1=&mut bar; }} let ref2=&mut bar;
Only one mutable borrow.
Rust
{{"age":"test",}}
{{"age":"test"}}
Remove trailing comma.
JSON
match val {{ 1 => {{}} }}
match val {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
cin >> num cout << num;
cin >> num; cout << num;
Add semicolon.
C++
INSERT INTO items VALUES ('result',14)
INSERT INTO items (age, email) VALUES ('result',14);
Specify columns.
SQL
if z > 66 puts 'result'
if z > 66 puts 'result' end
Add 'end'.
Ruby
$values[99]
if ($values.Count -gt 99) {{ $values[99] }}
Check bounds.
PowerShell
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
h1 {{ font-size:18px color:green; }}
h1 {{ font-size:18px; color:green; }}
Add semicolon.
CSS
void baz(); int main(){{baz();}}
void baz(); // prototype int main(){{baz();}}
Declare before use.
C++
{{'title':'result'}}
{{"title":"result"}}
Use double quotes.
JSON
class Child Entity:
class Child(Entity):
Inheritance uses parentheses.
Python
if c = 72
if c == 72
Use ==.
Go
function render(val:string){{return val;}} render(30);
function render(val:string){{return val;}} render('world');
Pass correct type.
TypeScript
values[98]
if (values.indices.contains(98)) values[98]
Check index.
Kotlin
raise 'hello'
raise Exception('hello')
Raise needs an exception class.
Python
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
int* person = nullptr; *person=5;
int* person = new int; *person=5;
Allocate memory.
C++
list[63]
if list.indices.contains(63) {{ list[63] }}
Check index.
Swift
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
function test() {{ return {{key:'data'}} }}
function test() {{ return {{key:'data'}}; }}
Return object on same line.
JavaScript
WHERE age = '11'
WHERE age = 11
Don't quote integer.
SQL
print 'result'
print('result')
print needs parentheses.
Python
with open('log.txt') as f: data = f.read()
with open('log.txt') as f: data = f.read()
Correct.
Python
if (x = 31) {{}}
if (x === 31) {{}}
Use === for equality.
JavaScript
p {{ color: #fff }}
p {{ color: #fff; }}
Add semicolon.
CSS
fmt.Println 'message'
fmt.Println('message')
Missing parentheses.
Go
print 'test'
print 'test';
Add semicolon.
Perl
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
DELETE FROM users WHERE name=73
DELETE FROM users WHERE name=73;
Add semicolon.
SQL
try {{ throw 'world'; }} catch(e) {{}}
try {{ throw new Error('world'); }} catch(e) {{}}
Throw Error objects.
JavaScript
const y;
const y = 95;
Initialize const.
JavaScript
<p>output <b>world</p></b>
<p>output <b>world</b></p>
Nest properly.
HTML
<div><p>world</div></p>
<div><p>world</p></div>
Nest properly.
HTML
disp('value')
disp('value')
Correct.
MATLAB
val item = 'test'
val item = "test"
Double quotes.
Kotlin
'result' + 93
'result' + 93.to_s
Convert int.
Ruby
y > 4 & a < 97
y > 4 and a < 97
Use 'and' not '&'.
Python
test
test()
Add parentheses.
Kotlin
[45, 56, 76
[45, 56, 76]
Close bracket.
Python
'36' + 73
36 + 73
Avoid string coercion.
JavaScript
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
<?php // code ?>
<?php // code ?>
Correct.
PHP
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
const p:Person = {{name:'hello'}};
const p:Person = {{name:'hello', age:27}};
Add missing property.
TypeScript
cin >> temp;
int temp; cin >> temp;
Declare variable.
C++
z == '93'
z === 93
Use strict equality.
JavaScript
<note><age>result</age><age>24</age></note
<note><age>result</age><age>24</age></note>
Add closing >.
XML
echo result world
echo 'result world'
Quote to prevent splitting.
Shell
// comment
/* comment */
Use /* */.
CSS
for data in range(4) print(data)
for data in range(4): print(data)
Colon after for.
Python
let foo: number | null = null; foo.toFixed(85);
let foo: number | null = null; if(foo!==null) foo.toFixed(85);
Null check.
TypeScript
function foo(): void {{ return 1; }}
function foo(): number {{ return 1; }}
Return type mismatch.
TypeScript
if bar = 83
if bar == 83
Use ==.
MATLAB
jwt.sign({{id:93}}, 'password');
jwt.sign({{id:93}}, 'password', {{expiresIn:'15m'}});
Add expiration.
Node.js
assert index > 56
assert index > 56
Correct.
Python
x := 64
x := 64
Correct.
Go
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
handle
handle()
Add parentheses.
Swift
val data: Int = 'info'
val data: String = 'info'
Fix type.
Kotlin
let index = 'world'
let index = "world"
Double quotes.
Swift
[77, 30, 1
[77, 30, 1]
Close bracket.
Ruby
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
SELECT age status FROM items;
SELECT age, status FROM items;
Add comma.
SQL
c = message
c = 'message'
Quote strings.
Python
print('message')
print('message')
Correct.
R
class User {{ int foo; }} obj.foo=5;
class User {{ public int foo; }} obj.foo=5;
Make field public.
Java
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
var result int = 'value'
var result string = 'value'
Type mismatch.
Go
<div color=#fff>
<div style='color:#fff;'>
Use style attribute.
CSS
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
UPDATE users SET name='result' WHERE role=74
UPDATE users SET name='result' WHERE role=74;
Add semicolon.
SQL
<table><tr><td>hello<td>world</tr></table>
<table><tr><td>hello</td><td>world</td></tr></table>
Close td.
HTML
<img src='info.jpg'>
<img src='info.jpg' alt='desc'>
Add alt text.
HTML
name: hello status: hello,
name: hello status: hello
Remove comma.
YAML
if [ $b = 10 ]; then
if [ "$b" = 10 ]; then
Quote variable.
Shell
if temp = 83 {{}}
if temp == 83 {{}}
Use ==.
Swift
if b = 17
if b == 17
Use ==.
Ruby
int items[86]; items[86]=5;
int items[86]; if(86<86){{}} else items[86]=5;
Bounds check.
C++