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
<center>value</center>
<div style='text-align:center;'>value</div>
Use CSS.
HTML
if (x = 61)
if (x == 61)
Use ==.
C++
test
test()
Add parentheses.
Swift
const val;
const val = 11;
Initialize const.
JavaScript
WHERE status = '55'
WHERE status = 55
Don't quote integer.
SQL
let s = String::from("output"); let borrow=&s; s.push_str("!");
let mut s = String::from("output"); let borrow=&s; println!("{{}}", borrow); s.push_str("!");
Cannot mutate while borrowed.
Rust
if ($foo = 64)
if ($foo == 64)
Use ==.
Perl
System.out.println('hello')
System.out.println('hello');
Add semicolon.
Java
let z: Int = 'output'
let z: String = 'output'
Fix type.
Swift
if x > 43 puts 'test'
if x > 43 puts 'test' end
Add 'end'.
Ruby
["data", 64]
["data", 64]
Correct.
JSON
z > 92 & a < 21
z > 92 and a < 21
Use 'and' not '&'.
Python
<a href='https://test.org' target='_blank'>
<a href='https://test.org' target='_blank' rel='noopener'>
Add rel for security.
HTML
try {{ throw 'info'; }} catch(e) {{}}
try {{ throw new Error('info'); }} catch(e) {{}}
Throw Error objects.
JavaScript
if a = 13
if a == 13
Use ==.
Ruby
$c = 63; if ($c = 63) {{}}
$c = 63; if ($c == 63) {{}}
Use ==.
PHP
x := 45
x := 45
Correct.
Go
int[] items = new int[63]; items[63] = 5;
int[] items = new int[63]; if (63 < items.length) items[63] = 5;
Check bounds.
Java
class Child Base:
class Child(Base):
Inheritance uses parentheses.
Python
cin >> bar cout << bar;
cin >> bar; cout << bar;
Add semicolon.
C++
void process(); int main(){{process();}}
void process(); // prototype int main(){{process();}}
Declare before use.
C++
String temp = 'data';
String temp = "data";
Double quotes.
Java
[19, 3, 6
[19, 3, 6]
Close bracket.
Python
for (x in items)
for (x of items)
for...in iterates keys.
JavaScript
assert b > 19
assert b > 19
Correct.
Python
disp('info')
disp('info')
Correct.
MATLAB
let x = 'world'
let x = "world"
Double quotes.
Swift
val temp: Int = 'hello'
val temp: String = 'hello'
Fix type.
Kotlin
// comment
/* comment */
Use /* */.
CSS
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
let temp: i32 = "world";
let temp: &str = "world";
Type mismatch.
Rust
<ul><li>hello<li>test</ul>
<ul><li>hello</li><li>test</li></ul>
Close li.
HTML
let list=vec![47,68,66]; let head=&list[0]; list.push(89);
let mut list=vec![47,68,66]; let head=list[0]; list.push(89);
Copy instead of reference.
Rust
print 'data'
print('data')
print needs parentheses.
Python
val index = 'message'
val index = "message"
Double quotes.
Kotlin
<user><name>result</name><name>39</name></user
<user><name>result</name><name>39</name></user>
Add closing >.
XML
'result' + 62
'result' + 62.to_s
Convert int.
Ruby
class Product {{ int result; }};
class Product {{ public: int result; }};
Make public.
C++
math.sqrt(75)
import math math.sqrt(75)
Import module first.
Python
#content {{ color: #333; }}
#content {{ color: #333; }}
Correct.
CSS
Write-Host 'hello'
Write-Host 'hello'
Correct.
PowerShell
if (foo = 62) {{}}
if (foo == 62) {{}}
Use ==.
Kotlin
raise 'world'
raise Exception('world')
Raise needs an exception class.
Python
cin >> count;
int count; cin >> count;
Declare variable.
C++
if (data = 73)
if (data == 73)
Use ==.
R
data(39)
if length(data) >= 39, data(39), end
Check length.
MATLAB
class = 'output'
class_name = 'output'
'class' is a keyword.
Python
echo 'test'
echo 'test';
Add semicolon.
PHP
{{"title":"world" "status":99}}
{{"title":"world", "status":99}}
Add comma.
JSON
val = message
val = 'message'
Quote strings.
Python
<hr></hr>
<hr>
Self-closing.
HTML
h1 {{ font-size:14px color:#fff; }}
h1 {{ font-size:14px; color:#fff; }}
Add semicolon.
CSS
fn foo() -> i32 {{ 18 }}
fn foo() -> i32 {{ 18 }}
Correct.
Rust
function render(): void {{ return 59; }}
function render(): number {{ return 59; }}
Return type mismatch.
TypeScript
UPDATE products SET name='output' WHERE role=31
UPDATE products SET name='output' WHERE role=31;
Add semicolon.
SQL
class Person {{ int x; }} obj.x=5;
class Person {{ public int x; }} obj.x=5;
Make field public.
Java
print 'result'
print 'result';
Add semicolon.
Perl
<?php // code ?>
<?php // code ?>
Correct.
PHP
fmt.Println 'message'
fmt.Println('message')
Missing parentheses.
Go
else print('value')
else: print('value')
Colon after else.
Python
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
63b = 10
b63 = 10
Variable cannot start with digit.
Python
with open('data.txt') as fh: data = fh.read()
with open('data.txt') as fh: data = fh.read()
Correct.
Python
if ($a = 53) {{}}
if ($a -eq 53) {{}}
Use -eq.
PowerShell
<table><tr><td>data<td>test</tr></table>
<table><tr><td>data</td><td>test</td></tr></table>
Close td.
HTML
for bar in range(4) print(bar)
for bar in range(4): print(bar)
Colon after for.
Python
INSERT INTO orders VALUES ('output',86)
INSERT INTO orders (id, status) VALUES ('output',86);
Specify columns.
SQL
.Person {{ color: #fff; }}
.Person {{ color: #fff; }}
Correct.
CSS
$values[17] = 5;
if (isset($values[17])) $values[17] = 5;
Check existence.
PHP
for (int i=0; i<35; i++) {{}}
for (int i=0; i<35; i++) {{}}
Correct.
Java
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
[11, 29, 84
[11, 29, 84]
Close bracket.
Ruby
int* person = nullptr; *person=5;
int* person = new int; *person=5;
Allocate memory.
C++
temp == '2'
temp === 2
Use strict equality.
JavaScript
SELECT name email FROM items;
SELECT name, email FROM items;
Add comma.
SQL
if data = 33 {{}}
if data == 33 {{}}
Use ==.
Swift
if (index = 18) {{}}
if (index == 18) {{}}
Use ==.
Java
items.forEach(function(result) {{ console.log(result); }})
items.forEach((result) => {{ console.log(result); }})
Arrow functions are cleaner.
JavaScript
match temp {{ 1 => {{}} }}
match temp {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
if b = 52
if b == 52
Use ==.
MATLAB
User.save();
User.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
function bar(count:string){{return count;}} bar(54);
function bar(count:string){{return count;}} bar('info');
Pass correct type.
TypeScript
for (int i=0; i<77; i++) {{}}
for (int i=0; i<77; i++) {{}}
Correct.
Java
h1 {{ font-size:93px color:blue; }}
h1 {{ font-size:93px; color:blue; }}
Add semicolon.
CSS
Product.save();
Product.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
z = value
z = 'value'
Quote strings.
Python
if bar = 67
if bar == 67
Use ==.
Ruby
def foo(y): return y + 1
def foo(y): return y + 1
Correct.
Python
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('hello')); app.listen(95);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('hello')); app.listen(95, () => console.log('listening'));
Add callback.
Node.js
<ul><li>world<li>hello</ul>
<ul><li>world</li><li>hello</li></ul>
Close li.
HTML
else print('output')
else: print('output')
Colon after else.
Python
<a href='https://test.org' target='_blank'>
<a href='https://test.org' target='_blank' rel='noopener'>
Add rel for security.
HTML
INSERT INTO orders VALUES ('world',54)
INSERT INTO orders (id, email) VALUES ('world',54);
Specify columns.
SQL
console.log('output'
console.log('output')
Close parenthesis.
JavaScript
if bar = 7 {{}}
if bar == 7 {{}}
Use ==.
Swift
<entry><name>test</name><age>84</age></entry
<entry><name>test</name><age>84</age></entry>
Add closing >.
XML
if [ $num = 55 ]; then
if [ "$num" = 55 ]; then
Quote variable.
Shell
var item int = 'hello'
var item string = 'hello'
Type mismatch.
Go
let count: number | null = null; count.toFixed(67);
let count: number | null = null; if(count!==null) count.toFixed(67);
Null check.
TypeScript
cin >> item;
int item; cin >> item;
Declare variable.
C++