Datasets:
Gugu8
/
Code-Syntax-Expanded

Dataset card Data Studio Files
xet
 Community
1
wrong_code
stringlengths
3
123
correct_code
stringlengths
3
155
explanation
stringclasses
101 values
language
stringclasses
26 values
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
h1 {{ font-size:84px color:green; }}
h1 {{ font-size:84px; color:green; }}
Add semicolon.
CSS
<img src='data.jpg'>
<img src='data.jpg' alt='desc'>
Add alt text.
HTML
if [ $a = 10 ]; then
if [ "$a" = 10 ]; then
Quote variable.
Shell
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
val foo = 'hello'
val foo = "hello"
Double quotes.
Kotlin
sys.sqrt(68)
import sys sys.sqrt(68)
Import module first.
Python
<ul><li>hello<li>world</ul>
<ul><li>hello</li><li>world</li></ul>
Close li.
HTML
<table><tr><td>hello<td>world</tr></table>
<table><tr><td>hello</td><td>world</td></tr></table>
Close td.
HTML
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
raise 'output'
raise Exception('output')
Raise needs an exception class.
Python
class = 'message'
class_name = 'message'
'class' is a keyword.
Python
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
var x = 83;
var x = 83;
Correct.
Dart
arr.forEach(function(x) {{ console.log(x); }})
arr.forEach((x) => {{ console.log(x); }})
Arrow functions are cleaner.
JavaScript
values[59]
if (values.indices.contains(59)) values[59]
Check index.
Kotlin
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('hello')); app.listen(85);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('hello')); app.listen(85, () => console.log('listening'));
Add callback.
Node.js
if x = 100 then print('test') end
if x == 100 then print('test') end
Use ==.
Lua
items[30]
if items.indices.contains(30) {{ items[30] }}
Check index.
Swift
const http = require('http'); http.createServer((req,res) => res.end('result')).listen(85);
const http = require('http'); http.createServer((req,res) => res.end('result')).listen(85);
Correct.
Node.js
div {{ color=red; }}
div {{ color: red; }}
Use colon.
CSS
{{'id':66, 'title' 69}}
{{'id':66, 'title':69}}
Colon missing.
Python
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS
echo 'result'
echo 'result';
Add semicolon.
PHP
print 'hello'
print('hello')
Parentheses for function call.
Lua
else print('info')
else: print('info')
Colon after else.
Python
def foo(temp): return temp + 1
def foo(temp): return temp + 1
Correct.
Python
<br></br>
<br>
Self-closing.
HTML
const count = 46; count = 16;
let count = 46; count = 16;
Cannot reassign const.
JavaScript
let x = 19; x += 1;
let mut x = 19; x += 1;
Need mut to modify.
Rust
console.log('message'
console.log('message')
Close parenthesis.
JavaScript
switch(foo){{ case 6: break; }}
switch(foo){{ case 6: break; default: break; }}
Add default case.
Java
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
[x*x for x in arr if x > 43]
[x*x for x in arr if x > 43]
Correct list comprehension.
Python
function bar() {{ echo 'data'; }}
function bar() {{ echo 'data'; }}
Correct.
PHP
with open('input.csv') as fh: data = fh.read()
with open('input.csv') as fh: data = fh.read()
Correct.
Python
<input type='text' value='value'>
<input type='text' value='value' name='title'>
Add name attribute.
HTML
{{"id":"info" "name":53}}
{{"id":"info", "name":53}}
Add comma.
JSON
SELECT id email FROM items;
SELECT id, email FROM items;
Add comma.
SQL
int[] list = new int[30]; list[30] = 5;
int[] list = new int[30]; if (30 < list.length) list[30] = 5;
Check bounds.
Java
if val = 56:
if val == 56:
Use == for comparison.
Python
if y = 27 {{}}
if y == 27 {{}}
Use ==.
Swift
SELECT COUNT(*) FROM orders
SELECT COUNT(*) FROM orders;
Missing semicolon.
SQL
x := 84
x := 84
Correct.
Go
if count = 92
if count == 92
Use ==.
Go
println('message')
println("message")
Double quotes.
Scala
if (num = 49) {}
if (num == 49) {}
Use ==.
Dart
Post.save();
Post.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
z = data
z = 'data'
Quote strings.
Python
bar == '41'
bar === 41
Use strict equality.
JavaScript
for i=1,58 do print(i) end
for i=1,58 do print(i) end
Correct.
Lua
values(16)
if length(values) >= 16, values(16), end
Check length.
MATLAB
int* p = nullptr; *p=5;
int* p = new int; *p=5;
Allocate memory.
C++
try {{ throw 'data'; }} catch(e) {{}}
try {{ throw new Error('data'); }} catch(e) {{}}
Throw Error objects.
JavaScript
if (num = 52) {{}}
if (num === 52) {{}}
Use === for equality.
JavaScript
if a = 18
if a == 18
Use ==.
MATLAB
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
<person age=59>
<person age="59">
Quote attribute.
XML
System.out.println('info')
System.out.println('info');
Add semicolon.
Java
INSERT INTO items VALUES ('hello',59)
INSERT INTO items (id, email) VALUES ('hello',59);
Specify columns.
SQL
// comment
/* comment */
Use /* */.
CSS
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
{ "name": "test" }
{ "name": "test" }
Correct.
JSON
while read line; do echo $line; done < log.txt
while read line; do echo $line; done < log.txt
Correct.
Shell
{{"id":"info",}}
{{"id":"info"}}
Remove trailing comma.
JSON
{{'title':'data'}}
{{"title":"data"}}
Use double quotes.
JSON
WHERE id = '86'
WHERE id = 86
Don't quote integer.
SQL
if ($x = 14) {{}}
if ($x -eq 14) {{}}
Use -eq.
PowerShell
if result = 28
if result == 28
Use ==.
Ruby
JOIN profiles ON products.id = profiles.email
JOIN profiles ON products.id = profiles.email
Correct.
SQL
let mut x=35; let ref1=&mut x; let r2=&mut x;
let mut x=35; {{ let ref1=&mut x; }} let r2=&mut x;
Only one mutable borrow.
Rust
59item = 10
item59 = 10
Variable cannot start with digit.
Python
var result int = 'value'
var result string = 'value'
Type mismatch.
Go
class Person def method end end
class Person def method end end
Correct.
Ruby
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
if (data = 2) {{}}
if (data == 2) {{}}
Use ==.
Java
local index = 51
local index = 51
Correct.
Lua
$temp = 26; if ($temp = 26) {{}}
$temp = 26; if ($temp == 26) {{}}
Use ==.
PHP
fmt.Println 'hello'
fmt.Println('hello')
Missing parentheses.
Go
print('hello')
print('hello')
Correct.
R
let temp: Int = 'message'
let temp: String = 'message'
Fix type.
Swift
let y: number = 'info';
let y: string = 'info';
Fix type.
TypeScript
status: info name: data,
status: info name: data
Remove comma.
YAML
List(16,52,47)
List(16,52,47)
Correct.
Scala
list[17]
if (length(list) >= 17) list[17]
Check length.
R
let str1 = String::from("world"); let text2 = str1; println!("{{}}", str1);
let str1 = String::from("world"); let text2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
var x int
var x int
Correct.
Go
if (temp = 61)
if (temp == 61)
Use ==.
C++
class User {{ int result; }} obj.result=5;
class User {{ public int result; }} obj.result=5;
Make field public.
Java
<center>hello</center>
<div style='text-align:center;'>hello</div>
Use CSS.
HTML
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
'99' + 29
99 + 29
Avoid string coercion.
JavaScript
if z > 84 puts 'hello'
if z > 84 puts 'hello' end
Add 'end'.
Ruby
foo
foo()
Add parentheses.
Kotlin
$arr[75]
if ($arr.Count -gt 75) {{ $arr[75] }}
Check bounds.
PowerShell
function foo(bar) print(bar) end
function foo(bar) print(bar) end
Correct.
Lua
for x in range(71) print(x)
for x in range(71): print(x)
Colon after for.
Python