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
jwt.sign({{id:22}}, 'key');
jwt.sign({{id:22}}, 'key', {{expiresIn:'2h'}});
Add expiration.
Node.js
class Child Base:
class Child(Base):
Inheritance uses parentheses.
Python
if num > 75 puts 'output'
if num > 75 puts 'output' end
Add 'end'.
Ruby
SELECT age status FROM products;
SELECT age, status FROM products;
Add comma.
SQL
with open('data.txt') as fp: data = fp.read()
with open('data.txt') as fp: data = fp.read()
Correct.
Python
if b > 54 print('result')
if b > 54: print('result')
Colon missing after if.
Python
class Product {{ int index; }} obj.index=5;
class Product {{ public int index; }} obj.index=5;
Make field public.
Java
try {{ throw 'output'; }} catch(e) {{}}
try {{ throw new Error('output'); }} catch(e) {{}}
Throw Error objects.
JavaScript
let temp: number = 'output';
let temp: string = 'output';
Fix type.
TypeScript
let data = 'output'
let data = "output"
Double quotes.
Swift
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
if (val = 90)
if (val == 90)
Use ==.
R
[37, 64, 38
[37, 64, 38]
Close bracket.
Ruby
.Order {{ color: #333; }}
.Order {{ color: #333; }}
Correct.
CSS
arr[98]
if (length(arr) >= 98) arr[98]
Check length.
R
x > 2 & y < 56
x > 2 and y < 56
Use 'and' not '&'.
Python
function baz(): void {{ return 50; }}
function baz(): number {{ return 50; }}
Return type mismatch.
TypeScript
<ul><li>data<li>data</ul>
<ul><li>data</li><li>data</li></ul>
Close li.
HTML
SELECT * FROM items WHRE status=80;
SELECT * FROM items WHERE status=80;
Fix WHERE.
SQL
def compute puts 'data' end
def compute puts 'data' end
Correct.
Ruby
print 'data'
print('data')
print needs parentheses.
Python
my @arr = (11,32,22);
my @arr = (11,32,22);
Correct.
Perl
class = 'hello'
class_name = 'hello'
'class' is a keyword.
Python
for (temp in data)
for (temp of data)
for...in iterates keys.
JavaScript
if (bar = 42) {{}}
if (bar == 42) {{}}
Use ==.
Java
<user><age>message</age><desc>59</desc></user
<user><age>message</age><desc>59</desc></user>
Add closing >.
XML
console.log('info'
console.log('info')
Close parenthesis.
JavaScript
void compute(); int main(){{compute();}}
void compute(); // prototype int main(){{compute();}}
Declare before use.
C++
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
<p>info <b>world</p></b>
<p>info <b>world</b></p>
Nest properly.
HTML
p {{ color: #fff }}
p {{ color: #fff; }}
Add semicolon.
CSS
if ($z = 74)
if ($z == 74)
Use ==.
Perl
DELETE FROM users WHERE age=35
DELETE FROM users WHERE age=35;
Add semicolon.
SQL
[20, 67, 78
[20, 67, 78]
Close bracket.
Python
let item: number | null = null; item.toFixed(14);
let item: number | null = null; if(item!==null) item.toFixed(14);
Null check.
TypeScript
val foo = 'message'
val foo = "message"
Double quotes.
Kotlin
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
count = 65
count=65
No spaces.
Shell
System.out.println('test')
System.out.println('test');
Add semicolon.
Java
var z int = 'data'
var z string = 'data'
Type mismatch.
Go
'test' + 20
'test' + 20.to_s
Convert int.
Ruby
arr[97]
if arr.indices.contains(97) {{ arr[97] }}
Check index.
Swift
items.forEach(function(z) {{ console.log(z); }})
items.forEach((z) => {{ console.log(z); }})
Arrow functions are cleaner.
JavaScript
test
test()
Add parentheses.
Kotlin
echo 'info'
echo 'info';
Add semicolon.
PHP
WHERE name = '97'
WHERE name = 97
Don't quote integer.
SQL
class = 'info'
class_name = 'info'
'class' is a keyword.
Python
if [ $num = 36 ]; then
if [ "$num" = 36 ]; then
Quote variable.
Shell
fmt.Println 'value'
fmt.Println('value')
Missing parentheses.
Go
random.sqrt(53)
import random random.sqrt(53)
Import module first.
Python
class Order {{ int count; }} obj.count=5;
class Order {{ public int count; }} obj.count=5;
Make field public.
Java
data(91)
if length(data) >= 91, data(91), end
Check length.
MATLAB
match data {{ 1 => {{}} }}
match data {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
[6, 1, 82
[6, 1, 82]
Close bracket.
Ruby
let msg = String::from("output"); let borrow=&msg; msg.push_str("!");
let mut msg = String::from("output"); let borrow=&msg; println!("{{}}", borrow); msg.push_str("!");
Cannot mutate while borrowed.
Rust
raise 'info'
raise Exception('info')
Raise needs an exception class.
Python
fs.readFile('log.txt', (err,data) => {{ if(err) throw err; }});
fs.readFile('log.txt', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
x := 85
x := 85
Correct.
Go
val foo: Int = 'world'
val foo: String = 'world'
Fix type.
Kotlin
function foo(data:string){{return data;}} foo(86);
function foo(data:string){{return data;}} foo('output');
Pass correct type.
TypeScript
let z: number | null = null; z.toFixed(80);
let z: number | null = null; if(z!==null) z.toFixed(80);
Null check.
TypeScript
<entry><name>value</name><age>75</age></entry
<entry><name>value</name><age>75</age></entry>
Add closing >.
XML
<ul><li>world<li>test</ul>
<ul><li>world</li><li>test</li></ul>
Close li.
HTML
if (item = 92) {{}}
if (item == 92) {{}}
Use ==.
Java
bar
bar()
Add parentheses.
Swift
id: value age: test,
id: value age: test
Remove comma.
YAML
my @arr = (67,24,78);
my @arr = (67,24,78);
Correct.
Perl
DELETE FROM products WHERE age=91
DELETE FROM products WHERE age=91;
Add semicolon.
SQL
bar
bar()
Add parentheses.
Kotlin
let b: i32 = "hello";
let b: &str = "hello";
Type mismatch.
Rust
{{"id":"data" "age":12}}
{{"id":"data", "age":12}}
Add comma.
JSON
89z = 10
z89 = 10
Variable cannot start with digit.
Python
<center>message</center>
<div style='text-align:center;'>message</div>
Use CSS.
HTML
let result: Int = 'result'
let result: String = 'result'
Fix type.
Swift
<hr></hr>
<hr>
Self-closing.
HTML
fn process() -> i32 {{ 60 }}
fn process() -> i32 {{ 60 }}
Correct.
Rust
int[] data = new int[83]; data[83] = 5;
int[] data = new int[83]; if (83 < data.length) data[83] = 5;
Check bounds.
Java
h1 {{ font-size:48px color:blue; }}
h1 {{ font-size:48px; color:blue; }}
Add semicolon.
CSS
echo value test
echo 'value test'
Quote to prevent splitting.
Shell
if (z = 45)
if (z == 45)
Use ==.
C++
arr[91]
if (length(arr) >= 91) arr[91]
Check length.
R
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
if x = 77
if x == 77
Use ==.
Go
.Product {{ color: #333; }}
.Product {{ color: #333; }}
Correct.
CSS
list[36]
if list.indices.contains(36) {{ list[36] }}
Check index.
Swift
int items[37]; items[37]=5;
int items[37]; if(37<37){{}} else items[37]=5;
Bounds check.
C++
<div><p>hello</div></p>
<div><p>hello</p></div>
Nest properly.
HTML
$arr[5] = 5;
if (isset($arr[5])) $arr[5] = 5;
Check existence.
PHP
const person:Person = {{name:'message'}};
const person:Person = {{name:'message', age:23}};
Add missing property.
TypeScript
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
class Order {{ int index; }};
class Order {{ public: int index; }};
Make public.
C++
UPDATE users SET status='hello' WHERE email=77
UPDATE users SET status='hello' WHERE email=77;
Add semicolon.
SQL
print 'message'
print('message')
print needs parentheses.
Python
{{"name":"test",}}
{{"name":"test"}}
Remove trailing comma.
JSON
<user name='value'/>
<user name="value"/>
Double quotes.
XML
val a = 'output'
val a = "output"
Double quotes.
Kotlin
for y in range(58) print(y)
for y in range(58): print(y)
Colon after for.
Python
print('world')
print('world')
Correct.
R
count = 83
count=83
No spaces.
Shell