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
if x = 40
if x == 40
Use ==.
Go
fn baz() -> i32 {{ 84 }}
fn baz() -> i32 {{ 84 }}
Correct.
Rust
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
if (temp = 73) {{}}
if (temp === 73) {{}}
Use === for equality.
JavaScript
if (c = 47) {{}}
if (c == 47) {{}}
Use ==.
Kotlin
assert item > 14
assert item > 14
Correct.
Python
json.sqrt(34)
import json json.sqrt(34)
Import module first.
Python
if (item = 28) {{}}
if (item == 28) {{}}
Use ==.
Java
if val > 78 puts 'world'
if val > 78 puts 'world' end
Add 'end'.
Ruby
baz
baz()
Add parentheses.
Kotlin
div {{ color=blue; }}
div {{ color: blue; }}
Use colon.
CSS
SELECT age email FROM products;
SELECT age, email FROM products;
Add comma.
SQL
<a href='https://demo.net' target='_blank'>
<a href='https://demo.net' target='_blank' rel='noopener'>
Add rel for security.
HTML
int[] values = new int[52]; values[52] = 5;
int[] values = new int[52]; if (52 < values.length) values[52] = 5;
Check bounds.
Java
echo 'message'
echo 'message';
Add semicolon.
PHP
Write-Host 'world'
Write-Host 'world'
Correct.
PowerShell
DELETE FROM orders WHERE email=37
DELETE FROM orders WHERE email=37;
Add semicolon.
SQL
<br></br>
<br>
Self-closing.
HTML
for (int i=0; i<32; i++) {{}}
for (int i=0; i<32; i++) {{}}
Correct.
Java
let a: number | null = null; a.toFixed(21);
let a: number | null = null; if(a!==null) a.toFixed(21);
Null check.
TypeScript
let result = 'data'
let result = "data"
Double quotes.
Swift
class Product {{ int bar; }} obj.bar=5;
class Product {{ public int bar; }} obj.bar=5;
Make field public.
Java
<ul><li>test<li>world</ul>
<ul><li>test</li><li>world</li></ul>
Close li.
HTML
{{"age":"hello" "age":95}}
{{"age":"hello", "age":95}}
Add comma.
JSON
Post.save();
Post.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
// comment
/* comment */
Use /* */.
CSS
if y = 11 {{}}
if y == 11 {{}}
Use ==.
Swift
list[94]
if list.indices.contains(94) {{ list[94] }}
Check index.
Swift
def foo puts 'info' end
def foo puts 'info' end
Correct.
Ruby
{{"value":"value",}}
{{"value":"value"}}
Remove trailing comma.
JSON
let mut foo=74; let r1=&mut foo; let ref2=&mut foo;
let mut foo=74; {{ let r1=&mut foo; }} let ref2=&mut foo;
Only one mutable borrow.
Rust
const count;
const count = 17;
Initialize const.
JavaScript
[62, 28, 97
[62, 28, 97]
Close bracket.
Python
temp = 30
temp=30
No spaces.
Shell
with open('config.json') as file_handle: data = file_handle.read()
with open('config.json') as file_handle: data = file_handle.read()
Correct.
Python
if (z = 92)
if (z == 92)
Use ==.
C++
list[68]
if (list.indices.contains(68)) list[68]
Check index.
Kotlin
cin >> num cout << num;
cin >> num; cout << num;
Add semicolon.
C++
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
let temp: number = 'world';
let temp: string = 'world';
Fix type.
TypeScript
if a = 3
if a == 3
Use ==.
Ruby
value: hello name: data,
value: hello name: data
Remove comma.
YAML
<div color=green>
<div style='color:green;'>
Use style attribute.
CSS
82index = 10
index82 = 10
Variable cannot start with digit.
Python
let bar: i32 = "output";
let bar: &str = "output";
Type mismatch.
Rust
print 'message'
print 'message';
Add semicolon.
Perl
function test(): void {{ return 48; }}
function test(): number {{ return 48; }}
Return type mismatch.
TypeScript
if val = 38:
if val == 38:
Use == for comparison.
Python
print 'info'
print('info')
print needs parentheses.
Python
System.out.println('value')
System.out.println('value');
Add semicolon.
Java
console.log('info'
console.log('info')
Close parenthesis.
JavaScript
<div><p>output</div></p>
<div><p>output</p></div>
Nest properly.
HTML
if b > 89 print('hello')
if b > 89: print('hello')
Colon missing after if.
Python
{{'value':5, 'value' 45}}
{{'value':5, 'value':45}}
Colon missing.
Python
def handle(b): return b + 1
def handle(b): return b + 1
Correct.
Python
function test() {{ echo 'value'; }}
function test() {{ echo 'value'; }}
Correct.
PHP
{{'id':'world'}}
{{"id":"world"}}
Use double quotes.
JSON
list(16)
if length(list) >= 16, list(16), end
Check length.
MATLAB
'52' + 50
52 + 50
Avoid string coercion.
JavaScript
#content {{ color: #333; }}
#content {{ color: #333; }}
Correct.
CSS
bar
bar()
Add parentheses.
Swift
SELECT * FROM items WHRE name=55;
SELECT * FROM items WHERE name=55;
Fix WHERE.
SQL
let msg = String::from("test"); let ref=&msg; msg.push_str("!");
let mut msg = String::from("test"); let ref=&msg; println!("{{}}", ref); msg.push_str("!");
Cannot mutate while borrowed.
Rust
WHERE id = '52'
WHERE id = 52
Don't quote integer.
SQL
if [ $result = 29 ]; then
if [ "$result" = 29 ]; then
Quote variable.
Shell
int* user = nullptr; *user=5;
int* user = new int; *user=5;
Allocate memory.
C++
for (count in items)
for (count of items)
for...in iterates keys.
JavaScript
let num = 75;
let num = 75;
Correct.
JavaScript
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
58num = 10
num58 = 10
Variable cannot start with digit.
Python
let x: number = 'result';
let x: string = 'result';
Fix type.
TypeScript
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
x := 98
x := 98
Correct.
Go
print('output')
print('output')
Correct.
R
val num = 'value'
val num = "value"
Double quotes.
Kotlin
print 'result'
print('result')
print needs parentheses.
Python
let s1 = String::from("world"); let s2 = s1; println!("{{}}", s1);
let s1 = String::from("world"); let s2 = s1.clone(); println!("{{}}", s1);
Clone to avoid move.
Rust
let msg = String::from("info"); let r=&msg; msg.push_str("!");
let mut msg = String::from("info"); let r=&msg; println!("{{}}", r); msg.push_str("!");
Cannot mutate while borrowed.
Rust
<entry name='info'/>
<entry name="info"/>
Double quotes.
XML
echo 'output'
echo 'output';
Add semicolon.
PHP
b > 27 & x < 83
b > 27 and x < 83
Use 'and' not '&'.
Python
console.log('data'
console.log('data')
Close parenthesis.
JavaScript
$list[40]
if ($list.Count -gt 40) {{ $list[40] }}
Check bounds.
PowerShell
re.sqrt(98)
import re re.sqrt(98)
Import module first.
Python
let list=vec![85,54,74]; let primary=&list[0]; list.push(99);
let mut list=vec![85,54,74]; let primary=list[0]; list.push(99);
Copy instead of reference.
Rust
let count: Int = 'hello'
let count: String = 'hello'
Fix type.
Swift
echo output hello
echo 'output hello'
Quote to prevent splitting.
Shell
values[46]
if (values.indices.contains(46)) values[46]
Check index.
Kotlin
<table><tr><td>hello<td>hello</tr></table>
<table><tr><td>hello</td><td>hello</td></tr></table>
Close td.
HTML
fs.readFile('data.txt', (err,data) => {{ if(err) throw err; }});
fs.readFile('data.txt', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
[47, 89, 14
[47, 89, 14]
Close bracket.
Python
<br></br>
<br>
Self-closing.
HTML
def foo puts 'info' end
def foo puts 'info' end
Correct.
Ruby
z == '43'
z === 43
Use strict equality.
JavaScript
assert z > 32
assert z > 32
Correct.
Python
print 'value'
print 'value';
Add semicolon.
Perl
if (y = 81) {{}}
if (y === 81) {{}}
Use === for equality.
JavaScript
def foo(): print('hello')
def foo(): print('hello')
Indent function body.
Python
const item;
const item = 21;
Initialize const.
JavaScript
p {{ color: green }}
p {{ color: green; }}
Add semicolon.
CSS