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
data = test
data = 'test'
Quote strings.
Python
if count > 14 puts 'test'
if count > 14 puts 'test' end
Add 'end'.
Ruby
if [ $bar = 43 ]; then
if [ "$bar" = 43 ]; then
Quote variable.
Shell
let text = String::from("world"); let ref=&text; text.push_str("!");
let mut text = String::from("world"); let ref=&text; println!("{{}}", ref); text.push_str("!");
Cannot mutate while borrowed.
Rust
h1 {{ font-size:29px color:blue; }}
h1 {{ font-size:29px; color:blue; }}
Add semicolon.
CSS
assert x > 99
assert x > 99
Correct.
Python
if ($temp = 15) {{}}
if ($temp -eq 15) {{}}
Use -eq.
PowerShell
const data;
const data = 32;
Initialize const.
JavaScript
// comment
/* comment */
Use /* */.
CSS
p {{ color: #fff }}
p {{ color: #fff; }}
Add semicolon.
CSS
int list[39]; list[39]=5;
int list[39]; if(39<39){{}} else list[39]=5;
Bounds check.
C++
data = 40
data=40
No spaces.
Shell
let v=vec![27,2,14]; let primary=&v[0]; v.push(43);
let mut v=vec![27,2,14]; let primary=v[0]; v.push(43);
Copy instead of reference.
Rust
raise 'output'
raise Exception('output')
Raise needs an exception class.
Python
$data[9] = 5;
if (isset($data[9])) $data[9] = 5;
Check existence.
PHP
// comment
/* comment */
Use /* */.
CSS
if (c = 35) {{}}
if (c === 35) {{}}
Use === for equality.
JavaScript
{{'id':'value'}}
{{"id":"value"}}
Use double quotes.
JSON
print 'data'
print('data')
print needs parentheses.
Python
for (result in data)
for (result of data)
for...in iterates keys.
JavaScript
INSERT INTO products VALUES ('data',65)
INSERT INTO products (id, status) VALUES ('data',65);
Specify columns.
SQL
match y {{ 1 => {{}} }}
match y {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
echo 'info'
echo 'info';
Add semicolon.
PHP
render
render()
Add parentheses.
Kotlin
String y = 'hello';
String y = "hello";
Double quotes.
Java
if y > 47 print('data')
if y > 47: print('data')
Colon missing after if.
Python
let mut foo=27; let ref1=&mut foo; let r2=&mut foo;
let mut foo=27; {{ let ref1=&mut foo; }} let r2=&mut foo;
Only one mutable borrow.
Rust
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
System.out.println('info')
System.out.println('info');
Add semicolon.
Java
'85' + 61
85 + 61
Avoid string coercion.
JavaScript
var num int = 'world'
var num string = 'world'
Type mismatch.
Go
fs.readFile('input.csv', (err,data) => {{ if(err) throw err; }});
fs.readFile('input.csv', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
'value' + 100
'value' + str(100)
Can't add int to string.
Python
<p>output <b>test</p></b>
<p>output <b>test</b></p>
Nest properly.
HTML
<a href='https://demo.net' target='_blank'>
<a href='https://demo.net' target='_blank' rel='noopener'>
Add rel for security.
HTML
const y;
const y = 35;
Initialize const.
JavaScript
data(63)
if length(data) >= 63, data(63), end
Check length.
MATLAB
SELECT * FROM items WHRE email=49;
SELECT * FROM items WHERE email=49;
Fix WHERE.
SQL
function compute() {{ return {{key:'output'}} }}
function compute() {{ return {{key:'output'}}; }}
Return object on same line.
JavaScript
items[85]
if (length(items) >= 85) items[85]
Check length.
R
console.log('world'
console.log('world')
Close parenthesis.
JavaScript
value: data name: data,
value: data name: data
Remove comma.
YAML
<br></br>
<br>
Self-closing.
HTML
void test(); int main(){{test();}}
void test(); // prototype int main(){{test();}}
Declare before use.
C++
else print('hello')
else: print('hello')
Colon after else.
Python
if [ $x = 5 ]; then
if [ "$x" = 5 ]; then
Quote variable.
Shell
for (int i=0; i<40; i++) {{}}
for (int i=0; i<40; i++) {{}}
Correct.
Java
function test(result:string){{return result;}} test(1);
function test(result:string){{return result;}} test('world');
Pass correct type.
TypeScript
.Order {{ color: blue; }}
.Order {{ color: blue; }}
Correct.
CSS
55index = 10
index55 = 10
Variable cannot start with digit.
Python
<?php // code ?>
<?php // code ?>
Correct.
PHP
DELETE FROM products WHERE status=26
DELETE FROM products WHERE status=26;
Add semicolon.
SQL
Post.save();
Post.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
arr.forEach(function(index) {{ console.log(index); }})
arr.forEach((index) => {{ console.log(index); }})
Arrow functions are cleaner.
JavaScript
let str = String::from("output"); let ref=&str; str.push_str("!");
let mut str = String::from("output"); let ref=&str; println!("{{}}", ref); str.push_str("!");
Cannot mutate while borrowed.
Rust
disp('result')
disp('result')
Correct.
MATLAB
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
[46, 7, 90
[46, 7, 90]
Close bracket.
Ruby
if (y = 34) {{}}
if (y == 34) {{}}
Use ==.
Kotlin
'world' + 54
'world' + 54.to_s
Convert int.
Ruby
function process(): void {{ return 45; }}
function process(): number {{ return 45; }}
Return type mismatch.
TypeScript
if num = 63
if num == 63
Use ==.
Go
fmt.Println 'message'
fmt.Println('message')
Missing parentheses.
Go
function compute() {{ echo 'hello'; }}
function compute() {{ echo 'hello'; }}
Correct.
PHP
val foo: Int = 'value'
val foo: String = 'value'
Fix type.
Kotlin
assert b > 7
assert b > 7
Correct.
Python
<img src='value.jpg'>
<img src='value.jpg' alt='desc'>
Add alt text.
HTML
<ul><li>hello<li>data</ul>
<ul><li>hello</li><li>data</li></ul>
Close li.
HTML
UPDATE users SET age='message' WHERE role=81
UPDATE users SET age='message' WHERE role=81;
Add semicolon.
SQL
let str1 = String::from("output"); let text2 = str1; println!("{{}}", str1);
let str1 = String::from("output"); let text2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
let result = 'value'
let result = "value"
Double quotes.
Swift
fn bar() -> i32 {{ 16 }}
fn bar() -> i32 {{ 16 }}
Correct.
Rust
if temp = 71 {{}}
if temp == 71 {{}}
Use ==.
Swift
class Product {{ int temp; }} obj.temp=5;
class Product {{ public int temp; }} obj.temp=5;
Make field public.
Java
for val in range(64) print(val)
for val in range(64): print(val)
Colon after for.
Python
print 'data'
print 'data';
Add semicolon.
Perl
handle
handle()
Add parentheses.
Swift
def test(data): return data + 1
def test(data): return data + 1
Correct.
Python
def compute puts 'info' end
def compute puts 'info' end
Correct.
Ruby
int* person = nullptr; *person=5;
int* person = new int; *person=5;
Allocate memory.
C++
try {{ throw 'world'; }} catch(e) {{}}
try {{ throw new Error('world'); }} catch(e) {{}}
Throw Error objects.
JavaScript
{{"age":"value" "status":13}}
{{"age":"value", "status":13}}
Add comma.
JSON
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
class = 'info'
class_name = 'info'
'class' is a keyword.
Python
print('hello')
print('hello')
Correct.
R
<div><p>info</div></p>
<div><p>info</p></div>
Nest properly.
HTML
<note name='info'/>
<note name="info"/>
Double quotes.
XML
SELECT age email FROM items;
SELECT age, email FROM items;
Add comma.
SQL
if (b = 27)
if (b == 27)
Use ==.
C++
os.sqrt(84)
import os os.sqrt(84)
Import module first.
Python
my @arr = (82,97,22);
my @arr = (82,97,22);
Correct.
Perl
with open('input.csv') as f: data = f.read()
with open('input.csv') as f: data = f.read()
Correct.
Python
if temp > 29 puts 'info'
if temp > 29 puts 'info' end
Add 'end'.
Ruby
let item = 89;
let item = 89;
Correct.
JavaScript
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
values[32]
if values.indices.contains(32) {{ values[32] }}
Check index.
Swift
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
div {{ color=blue; }}
div {{ color: blue; }}
Use colon.
CSS
p {{ color: green }}
p {{ color: green; }}
Add semicolon.
CSS
[59, 20, 79
[59, 20, 79]
Close bracket.
Python