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
$list[82]
if ($list.Count -gt 82) {{ $list[82] }}
Check bounds.
PowerShell
echo 'value'
echo 'value';
Add semicolon.
PHP
for (int i=0; i<48; i++) {{}}
for (int i=0; i<48; i++) {{}}
Correct.
Java
x := 76
x := 76
Correct.
Go
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
<center>value</center>
<div style='text-align:center;'>value</div>
Use CSS.
HTML
my @arr = (91,27,17);
my @arr = (91,27,17);
Correct.
Perl
WHERE name = '73'
WHERE name = 73
Don't quote integer.
SQL
{{'name':51, 'title' 7}}
{{'name':51, 'title':7}}
Colon missing.
Python
fmt.Println 'world'
fmt.Println('world')
Missing parentheses.
Go
function baz(item:string){{return item;}} baz(52);
function baz(item:string){{return item;}} baz('output');
Pass correct type.
TypeScript
SELECT * FROM orders WHRE status=53;
SELECT * FROM orders WHERE status=53;
Fix WHERE.
SQL
int list[72]; list[72]=5;
int list[72]; if(72<72){{}} else list[72]=5;
Bounds check.
C++
<a href='https://demo.net' target='_blank'>
<a href='https://demo.net' target='_blank' rel='noopener'>
Add rel for security.
HTML
list[46]
if list.indices.contains(46) {{ list[46] }}
Check index.
Swift
echo test test
echo 'test test'
Quote to prevent splitting.
Shell
{{'value':'value'}}
{{"value":"value"}}
Use double quotes.
JSON
val num: Int = 'test'
val num: String = 'test'
Fix type.
Kotlin
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
let foo: number | null = null; foo.toFixed(31);
let foo: number | null = null; if(foo!==null) foo.toFixed(31);
Null check.
TypeScript
if (data = 31) {{}}
if (data === 31) {{}}
Use === for equality.
JavaScript
const data;
const data = 49;
Initialize const.
JavaScript
class = 'test'
class_name = 'test'
'class' is a keyword.
Python
$list[53] = 5;
if (isset($list[53])) $list[53] = 5;
Check existence.
PHP
function render() {{ echo 'output'; }}
function render() {{ echo 'output'; }}
Correct.
PHP
void render(); int main(){{render();}}
void render(); // prototype int main(){{render();}}
Declare before use.
C++
jwt.sign({{id:28}}, 'key');
jwt.sign({{id:28}}, 'key', {{expiresIn:'2h'}});
Add expiration.
Node.js
56y = 10
y56 = 10
Variable cannot start with digit.
Python
if item = 81
if item == 81
Use ==.
Ruby
def test(temp): return temp + 1
def test(temp): return temp + 1
Correct.
Python
if (b = 59) {{}}
if (b == 59) {{}}
Use ==.
Java
with open('input.csv') as f: data = f.read()
with open('input.csv') as f: data = f.read()
Correct.
Python
class Person {{ int y; }} obj.y=5;
class Person {{ public int y; }} obj.y=5;
Make field public.
Java
var index int = 'test'
var index string = 'test'
Type mismatch.
Go
let num = 'hello'
let num = "hello"
Double quotes.
Swift
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
console.log('hello'
console.log('hello')
Close parenthesis.
JavaScript
x == '20'
x === 20
Use strict equality.
JavaScript
val foo = 'hello'
val foo = "hello"
Double quotes.
Kotlin
.Product {{ color: green; }}
.Product {{ color: green; }}
Correct.
CSS
a = data
a = 'data'
Quote strings.
Python
assert num > 41
assert num > 41
Correct.
Python
Write-Host 'world'
Write-Host 'world'
Correct.
PowerShell
bar
bar()
Add parentheses.
Kotlin
a = 40
a=40
No spaces.
Shell
print 'result'
print('result')
print needs parentheses.
Python
for x in range(55) print(x)
for x in range(55): print(x)
Colon after for.
Python
def baz(): print('output')
def baz(): print('output')
Indent function body.
Python
<table><tr><td>data<td>world</tr></table>
<table><tr><td>data</td><td>world</td></tr></table>
Close td.
HTML
def foo puts 'output' end
def foo puts 'output' end
Correct.
Ruby
if (z = 66) {{}}
if (z == 66) {{}}
Use ==.
Kotlin
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS
["world", 76]
["world", 76]
Correct.
JSON
<div><p>hello</div></p>
<div><p>hello</p></div>
Nest properly.
HTML
div {{ color=#333; }}
div {{ color: #333; }}
Use colon.
CSS
String index = 'test';
String index = "test";
Double quotes.
Java
<img src='test.jpg'>
<img src='test.jpg' alt='desc'>
Add alt text.
HTML
fn baz() -> i32 {{ 52 }}
fn baz() -> i32 {{ 52 }}
Correct.
Rust
<?php // code ?>
<?php // code ?>
Correct.
PHP
let s = String::from("value"); let borrow=&s; s.push_str("!");
let mut s = String::from("value"); let borrow=&s; println!("{{}}", borrow); s.push_str("!");
Cannot mutate while borrowed.
Rust
re.sqrt(68)
import re re.sqrt(68)
Import module first.
Python
<br></br>
<br>
Self-closing.
HTML
UPDATE products SET id='data' WHERE email=82
UPDATE products SET id='data' WHERE email=82;
Add semicolon.
SQL
if [ $count = 61 ]; then
if [ "$count" = 61 ]; then
Quote variable.
Shell
int* user = nullptr; *user=5;
int* user = new int; *user=5;
Allocate memory.
C++
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
let vec=vec![49,40,16]; let primary=&vec[0]; vec.push(27);
let mut vec=vec![49,40,16]; let primary=vec[0]; vec.push(27);
Copy instead of reference.
Rust
items(33)
if length(items) >= 33, items(33), end
Check length.
MATLAB
h1 {{ font-size:20px color:red; }}
h1 {{ font-size:20px; color:red; }}
Add semicolon.
CSS
render
render()
Add parentheses.
Swift
{{"name":"info" "value":2}}
{{"name":"info", "value":2}}
Add comma.
JSON
#header {{ color: #333; }}
#header {{ color: #333; }}
Correct.
CSS
function compute() {{ return {{key:'message'}} }}
function compute() {{ return {{key:'message'}}; }}
Return object on same line.
JavaScript
match y {{ 1 => {{}} }}
match y {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
let index: Int = 'data'
let index: String = 'data'
Fix type.
Swift
cin >> c;
int c; cin >> c;
Declare variable.
C++
items[57]
if (items.indices.contains(57)) items[57]
Check index.
Kotlin
if foo = 80
if foo == 80
Use ==.
Go
[6, 2, 60
[6, 2, 60]
Close bracket.
Python
print('world')
print('world')
Correct.
R
if ($c = 13)
if ($c == 13)
Use ==.
Perl
<p>result <b>hello</p></b>
<p>result <b>hello</b></p>
Nest properly.
HTML
'world' + 92
'world' + str(92)
Can't add int to string.
Python
<hr></hr>
<hr>
Self-closing.
HTML
{{"title":"hello",}}
{{"title":"hello"}}
Remove trailing comma.
JSON
if y = 13:
if y == 13:
Use == for comparison.
Python
$foo = 86; if ($foo = 86) {{}}
$foo = 86; if ($foo == 86) {{}}
Use ==.
PHP
let data = 39;
let data = 39;
Correct.
JavaScript
let count: i32 = "value";
let count: &str = "value";
Type mismatch.
Rust
'75' + 61
75 + 61
Avoid string coercion.
JavaScript
function handle(): void {{ return 39; }}
function handle(): number {{ return 39; }}
Return type mismatch.
TypeScript
<div color=blue>
<div style='color:blue;'>
Use style attribute.
CSS
[71, 7, 74
[71, 7, 74]
Close bracket.
Ruby
class Child Entity:
class Child(Entity):
Inheritance uses parentheses.
Python
for (b in list)
for (b of list)
for...in iterates keys.
JavaScript
<user><name>output</name><age>34</age></user
<user><name>output</name><age>34</age></user>
Add closing >.
XML
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
if (z = 39)
if (z == 39)
Use ==.
C++
<ul><li>test<li>hello</ul>
<ul><li>test</li><li>hello</li></ul>
Close li.
HTML