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
my @arr = (47,28,36);
my @arr = (47,28,36);
Correct.
Perl
WHERE age = '40'
WHERE age = 40
Don't quote integer.
SQL
if (val = 51) {{}}
if (val == 51) {{}}
Use ==.
Kotlin
a == '68'
a === 68
Use strict equality.
JavaScript
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('world')); app.listen(25);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('world')); app.listen(25, () => console.log('listening'));
Add callback.
Node.js
Product.save();
Product.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
#main {{ color: #fff; }}
#main {{ color: #fff; }}
Correct.
CSS
else print('result')
else: print('result')
Colon after else.
Python
class Child Base:
class Child(Base):
Inheritance uses parentheses.
Python
p {{ color: green }}
p {{ color: green; }}
Add semicolon.
CSS
if (c = 10) {{}}
if (c == 10) {{}}
Use ==.
Java
fn test() -> i32 {{ 77 }}
fn test() -> i32 {{ 77 }}
Correct.
Rust
// comment
/* comment */
Use /* */.
CSS
list[21]
if (list.indices.contains(21)) list[21]
Check index.
Kotlin
raise 'result'
raise Exception('result')
Raise needs an exception class.
Python
const y;
const y = 63;
Initialize const.
JavaScript
let foo: number = 'info';
let foo: string = 'info';
Fix type.
TypeScript
items[92]
if (length(items) >= 92) items[92]
Check length.
R
if x = 35
if x == 35
Use ==.
Go
<div color=green>
<div style='color:green;'>
Use style attribute.
CSS
y > 59 & b < 4
y > 59 and b < 4
Use 'and' not '&'.
Python
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
<br></br>
<br>
Self-closing.
HTML
values(62)
if length(values) >= 62, values(62), end
Check length.
MATLAB
let y: i32 = "value";
let y: &str = "value";
Type mismatch.
Rust
val temp: Int = 'world'
val temp: String = 'world'
Fix type.
Kotlin
#header {{ color: #333; }}
#header {{ color: #333; }}
Correct.
CSS
div {{ color=green; }}
div {{ color: green; }}
Use colon.
CSS
my @arr = (44,79,26);
my @arr = (44,79,26);
Correct.
Perl
assert num > 13
assert num > 13
Correct.
Python
handle
handle()
Add parentheses.
Swift
int* obj = nullptr; *obj=5;
int* obj = new int; *obj=5;
Allocate memory.
C++
p {{ color: blue }}
p {{ color: blue; }}
Add semicolon.
CSS
int items[41]; items[41]=5;
int items[41]; if(41<41){{}} else items[41]=5;
Bounds check.
C++
if result = 93
if result == 93
Use ==.
Ruby
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
if ($val = 66)
if ($val == 66)
Use ==.
Perl
{{"status":"info" "title":13}}
{{"status":"info", "title":13}}
Add comma.
JSON
if [ $result = 42 ]; then
if [ "$result" = 42 ]; then
Quote variable.
Shell
WHERE status = '8'
WHERE status = 8
Don't quote integer.
SQL
def foo puts 'output' end
def foo puts 'output' end
Correct.
Ruby
int[] values = new int[95]; values[95] = 5;
int[] values = new int[95]; if (95 < values.length) values[95] = 5;
Check bounds.
Java
["hello", 81]
["hello", 81]
Correct.
JSON
$arr[96] = 5;
if (isset($arr[96])) $arr[96] = 5;
Check existence.
PHP
'message' + 56
'message' + str(56)
Can't add int to string.
Python
for (result in items)
for (result of items)
for...in iterates keys.
JavaScript
var z int = 'world'
var z string = 'world'
Type mismatch.
Go
disp('info')
disp('info')
Correct.
MATLAB
val temp = 'data'
val temp = "data"
Double quotes.
Kotlin
UPDATE orders SET name='value' WHERE role=27
UPDATE orders SET name='value' WHERE role=27;
Add semicolon.
SQL
cin >> z cout << z;
cin >> z; cout << z;
Add semicolon.
C++
// comment
/* comment */
Use /* */.
CSS
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
let b = 'output'
let b = "output"
Double quotes.
Swift
let mut b=51; let ref1=&mut b; let r2=&mut b;
let mut b=51; {{ let ref1=&mut b; }} let r2=&mut b;
Only one mutable borrow.
Rust
cin >> result;
int result; cin >> result;
Declare variable.
C++
jwt.sign({{id:81}}, 'token');
jwt.sign({{id:81}}, 'token', {{expiresIn:'2h'}});
Add expiration.
Node.js
<div><p>message</div></p>
<div><p>message</p></div>
Nest properly.
HTML
function handle(index:string){{return index;}} handle(40);
function handle(index:string){{return index;}} handle('test');
Pass correct type.
TypeScript
else print('result')
else: print('result')
Colon after else.
Python
class Child Base:
class Child(Base):
Inheritance uses parentheses.
Python
class = 'world'
class_name = 'world'
'class' is a keyword.
Python
values[32]
if values.indices.contains(32) {{ values[32] }}
Check index.
Swift
process
process()
Add parentheses.
Kotlin
echo 'result'
echo 'result';
Add semicolon.
PHP
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
{{"status":"message",}}
{{"status":"message"}}
Remove trailing comma.
JSON
fn bar() -> i32 {{ 65 }}
fn bar() -> i32 {{ 65 }}
Correct.
Rust
let str1 = String::from("test"); let s2 = str1; println!("{{}}", str1);
let str1 = String::from("test"); let s2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
class Order {{ int c; }} obj.c=5;
class Order {{ public int c; }} obj.c=5;
Make field public.
Java
INSERT INTO items VALUES ('hello',30)
INSERT INTO items (id, status) VALUES ('hello',30);
Specify columns.
SQL
print 'result'
print('result')
print needs parentheses.
Python
$y = 27; if ($y = 27) {{}}
$y = 27; if ($y == 27) {{}}
Use ==.
PHP
if (b = 66) {{}}
if (b == 66) {{}}
Use ==.
Kotlin
echo result world
echo 'result world'
Quote to prevent splitting.
Shell
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('output')); app.listen(46);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('output')); app.listen(46, () => console.log('listening'));
Add callback.
Node.js
System.out.println('message')
System.out.println('message');
Add semicolon.
Java
<entry name='message'/>
<entry name="message"/>
Double quotes.
XML
if (temp = 87) {{}}
if (temp === 87) {{}}
Use === for equality.
JavaScript
x := 69
x := 69
Correct.
Go
if (bar = 29) {{}}
if (bar == 29) {{}}
Use ==.
Java
<?php // code ?>
<?php // code ?>
Correct.
PHP
value: value age: data,
value: value age: data
Remove comma.
YAML
String val = 'world';
String val = "world";
Double quotes.
Java
result = 87
result=87
No spaces.
Shell
$list[97]
if ($list.Count -gt 97) {{ $list[97] }}
Check bounds.
PowerShell
console.log('hello'
console.log('hello')
Close parenthesis.
JavaScript
<a href='https://demo.net' target='_blank'>
<a href='https://demo.net' target='_blank' rel='noopener'>
Add rel for security.
HTML
<center>test</center>
<div style='text-align:center;'>test</div>
Use CSS.
HTML
class Person {{ int item; }};
class Person {{ public: int item; }};
Make public.
C++
DELETE FROM orders WHERE status=97
DELETE FROM orders WHERE status=97;
Add semicolon.
SQL
print 'output'
print 'output';
Add semicolon.
Perl
if val = 20
if val == 20
Use ==.
MATLAB
'hello' + 42
'hello' + 42.to_s
Convert int.
Ruby
function render() {{ echo 'result'; }}
function render() {{ echo 'result'; }}
Correct.
PHP
{{'age':'value'}}
{{"age":"value"}}
Use double quotes.
JSON
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
values[67]
if (values.indices.contains(67)) values[67]
Check index.
Kotlin
let vec=vec![61,8,36]; let first=&vec[0]; vec.push(81);
let mut vec=vec![61,8,36]; let first=vec[0]; vec.push(81);
Copy instead of reference.
Rust
h1 {{ font-size:66px color:red; }}
h1 {{ font-size:66px; color:red; }}
Add semicolon.
CSS