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
{{'value':'output'}}
{{"value":"output"}}
Use double quotes.
JSON
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
<div><p>hello</div></p>
<div><p>hello</p></div>
Nest properly.
HTML
$items[24]
if ($items.Count -gt 24) {{ $items[24] }}
Check bounds.
PowerShell
String result = 'value';
String result = "value";
Double quotes.
Java
DELETE FROM users WHERE status=85
DELETE FROM users WHERE status=85;
Add semicolon.
SQL
fn handle() -> i32 {{ 71 }}
fn handle() -> i32 {{ 71 }}
Correct.
Rust
String name = 'world';
String name = 'world';
Correct.
Dart
<p>value <b>hello</p></b>
<p>value <b>hello</b></p>
Nest properly.
HTML
if ($z = 11) {{}}
if ($z -eq 11) {{}}
Use -eq.
PowerShell
let data = 35;
let data = 35;
Correct.
JavaScript
if x > 32 print('data')
if x > 32: print('data')
Colon missing after if.
Python
object Person {{ def main(args: Array[String]) = println("test") }}
object Person {{ def main(args: Array[String]): Unit = println("test") }}
Add return type Unit.
Scala
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('info')); app.listen(2);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('info')); app.listen(2, () => console.log('listening'));
Add callback.
Node.js
arr[65]
if arr.indices.contains(65) {{ arr[65] }}
Check index.
Swift
<div color=red>
<div style='color:red;'>
Use style attribute.
CSS
let b = 36; let b = 39;
let b = 36; b = 39;
Duplicate declaration.
JavaScript
let list=vec![60,55,20]; let primary=&list[0]; list.push(5);
let mut list=vec![60,55,20]; let primary=list[0]; list.push(5);
Copy instead of reference.
Rust
div {{ color=blue; }}
div {{ color: blue; }}
Use colon.
CSS
var x int
var x int
Correct.
Go
WHERE name = '62'
WHERE name = 62
Don't quote integer.
SQL
match bar {{ 1 => {{}} }}
match bar {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
print 'hello'
print('hello')
Parentheses for function call.
Lua
<hr></hr>
<hr>
Self-closing.
HTML
data.forEach(function(count) {{ console.log(count); }})
data.forEach((count) => {{ console.log(count); }})
Arrow functions are cleaner.
JavaScript
p {{ color: green }}
p {{ color: green; }}
Add semicolon.
CSS
id: message name: hello,
id: message name: hello
Remove comma.
YAML
function test(b:string){{return b;}} test(98);
function test(b:string){{return b;}} test('data');
Pass correct type.
TypeScript
<input type='text' value='info'>
<input type='text' value='info' name='value'>
Add name attribute.
HTML
assert val > 90
assert val > 90
Correct.
Python
[29, 90, 66
[29, 90, 66]
Close bracket.
Ruby
<img src='value.jpg'>
<img src='value.jpg' alt='desc'>
Add alt text.
HTML
let x: number = 'info';
let x: string = 'info';
Fix type.
TypeScript
my @arr = (33,11,62);
my @arr = (33,11,62);
Correct.
Perl
void process(); int main(){{process();}}
void process(); // prototype int main(){{process();}}
Declare before use.
C++
int arr[98]; arr[98]=5;
int arr[98]; if(98<98){{}} else arr[98]=5;
Bounds check.
C++
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
// comment
/* comment */
Use /* */.
CSS
SELECT name role FROM products;
SELECT name, role FROM products;
Add comma.
SQL
cin >> temp;
int temp; cin >> temp;
Declare variable.
C++
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
for (val in items)
for (val of items)
for...in iterates keys.
JavaScript
else print('result')
else: print('result')
Colon after else.
Python
if (index = 17) {}
if (index == 17) {}
Use ==.
Dart
void main() {{ print('test') }}
void main() {{ print('test'); }}
Add semicolon.
Dart
var x = 31;
var x = 31;
Correct.
Dart
y > 60 & y < 51
y > 60 and y < 51
Use 'and' not '&'.
Python
if c = 64
if c == 64
Use ==.
Ruby
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
if (c = 99)
if (c == 99)
Use ==.
C++
if bar = 75
if bar == 75
Use ==.
Go
class Child Super:
class Child(Super):
Inheritance uses parentheses.
Python
'test' + 45
'test' + str(45)
Can't add int to string.
Python
const http = require('http'); http.createServer((req,res) => res.end('data')).listen(85);
const http = require('http'); http.createServer((req,res) => res.end('data')).listen(85);
Correct.
Node.js
match foo {{ 1 => {{}} }}
match foo {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
yield result
yield result
Correct yield.
Python
y = result
y = 'result'
Quote strings.
Python
fn render() -> i32 {{ 6 }}
fn render() -> i32 {{ 6 }}
Correct.
Rust
class = 'hello'
class_name = 'hello'
'class' is a keyword.
Python
h1 {{ font-size:82px color:#fff; }}
h1 {{ font-size:82px; color:#fff; }}
Add semicolon.
CSS
[x*x for x in data if x > 32]
[x*x for x in data if x > 32]
Correct list comprehension.
Python
.Person {{ color: #333; }}
.Person {{ color: #333; }}
Correct.
CSS
void main() {{ print('info') }}
void main() {{ print('info'); }}
Add semicolon.
Dart
[28, 79, 45
[28, 79, 45]
Close bracket.
Ruby
<table><tr><td>world<td>world</tr></table>
<table><tr><td>world</td><td>world</td></tr></table>
Close td.
HTML
let data = 93;
let data = 93;
Correct.
JavaScript
function render() {{ return {{key:'data'}} }}
function render() {{ return {{key:'data'}}; }}
Return object on same line.
JavaScript
List(82,13,18)
List(82,13,18)
Correct.
Scala
json.sqrt(91)
import json json.sqrt(91)
Import module first.
Python
process
process()
Add parentheses.
Kotlin
let y = 99; let y = 15;
let y = 99; y = 15;
Duplicate declaration.
JavaScript
<ul><li>test<li>world</ul>
<ul><li>test</li><li>world</li></ul>
Close li.
HTML
$count = 52; if ($count = 52) {{}}
$count = 52; if ($count == 52) {{}}
Use ==.
PHP
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
print 'test'
print 'test';
Add semicolon.
Perl
val result = 'test'
val result = "test"
Double quotes.
Kotlin
<p>world <b>test</p></b>
<p>world <b>test</b></p>
Nest properly.
HTML
function compute(y) print(y) end
function compute(y) print(y) end
Correct.
Lua
SELECT * FROM users WHRE name=68;
SELECT * FROM users WHERE name=68;
Fix WHERE.
SQL
<entry><name>message</name><age>25</age></entry
<entry><name>message</name><age>25</age></entry>
Add closing >.
XML
Post.save();
Post.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
if result = 20
if result == 20
Use ==.
Ruby
list[5]
if (list.indices.contains(5)) list[5]
Check index.
Kotlin
let mut b=71; let r1=&mut b; let ref2=&mut b;
let mut b=71; {{ let r1=&mut b; }} let ref2=&mut b;
Only one mutable borrow.
Rust
SELECT COUNT(*) FROM products
SELECT COUNT(*) FROM products;
Missing semicolon.
SQL
Write-Host 'test'
Write-Host 'test'
Correct.
PowerShell
String name = 'data';
String name = 'data';
Correct.
Dart
echo info test
echo 'info test'
Quote to prevent splitting.
Shell
y > 7 & b < 55
y > 7 and b < 55
Use 'and' not '&'.
Python
{{'id':'data'}}
{{"id":"data"}}
Use double quotes.
JSON
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
{{"status":"result",}}
{{"status":"result"}}
Remove trailing comma.
JSON
assert b > 15
assert b > 15
Correct.
Python
SELECT id role FROM users;
SELECT id, role FROM users;
Add comma.
SQL
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
class Child Base:
class Child(Base):
Inheritance uses parentheses.
Python
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
function bar() {{ echo 'data'; }}
function bar() {{ echo 'data'; }}
Correct.
PHP
<center>value</center>
<div style='text-align:center;'>value</div>
Use CSS.
HTML