wrong_code stringlengths 3 123 | correct_code stringlengths 3 155 | explanation stringclasses 83
values | language stringclasses 23
values |
|---|---|---|---|
if (val = 79) | if (val == 79) | Use ==. | C++ |
$temp = 35; if ($temp = 35) {{}} | $temp = 35; if ($temp == 35) {{}} | Use ==. | PHP |
[46, 85, 51 | [46, 85, 51] | Close bracket. | Ruby |
var result int = 'info' | var result string = 'info' | Type mismatch. | Go |
for z in range(30)
print(z) | for z in range(30):
print(z) | Colon after for. | Python |
let x = 'message' | let x = "message" | Double quotes. | Swift |
class User {{ int z; }}; | class User {{ public: int z; }}; | Make public. | C++ |
UPDATE products SET id='data' WHERE email=94 | UPDATE products SET id='data' WHERE email=94; | Add semicolon. | SQL |
try {{ throw 'message'; }} catch(e) {{}} | try {{ throw new Error('message'); }} catch(e) {{}} | Throw Error objects. | JavaScript |
let bar: i32 = "message"; | let bar: &str = "message"; | Type mismatch. | Rust |
$items[20] | if ($items.Count -gt 20) {{ $items[20] }} | Check bounds. | PowerShell |
if (foo = 44) {{}} | if (foo == 44) {{}} | Use ==. | Kotlin |
<br></br> | <br> | Self-closing. | HTML |
Write-Host 'message' | Write-Host 'message' | Correct. | PowerShell |
const count; | const count = 81; | Initialize const. | JavaScript |
json.sqrt(61) | import json
json.sqrt(61) | Import module first. | Python |
<?php
// code
?> | <?php
// code
?> | Correct. | PHP |
x := 31 | x := 31 | Correct. | Go |
items.forEach(function(temp) {{ console.log(temp); }}) | items.forEach((temp) => {{ console.log(temp); }}) | Arrow functions are cleaner. | JavaScript |
echo 'hello' | echo 'hello'; | Add semicolon. | PHP |
console.log('test' | console.log('test') | Close parenthesis. | JavaScript |
let z: number | null = null; z.toFixed(34); | let z: number | null = null; if(z!==null) z.toFixed(34); | Null check. | TypeScript |
jwt.sign({{id:96}}, 'token'); | jwt.sign({{id:96}}, 'token', {{expiresIn:'7d'}}); | Add expiration. | Node.js |
count == '8' | count === 8 | Use strict equality. | JavaScript |
String c = 'result'; | String c = "result"; | Double quotes. | Java |
<div><p>data</div></p> | <div><p>data</p></div> | Nest properly. | HTML |
if count > 77
print('world') | if count > 77:
print('world') | Colon missing after if. | Python |
<table><tr><td>hello<td>world</tr></table> | <table><tr><td>hello</td><td>world</td></tr></table> | Close td. | HTML |
let foo = 49; | let foo = 49; | Correct. | JavaScript |
$num = 54; if ($num = 54) {{}} | $num = 54; if ($num == 54) {{}} | Use ==. | PHP |
INSERT INTO users VALUES ('value',22) | INSERT INTO users (age, status) VALUES ('value',22); | Specify columns. | SQL |
b == '55' | b === 55 | Use strict equality. | JavaScript |
p {{ color: red }} | p {{ color: red; }} | Add semicolon. | CSS |
try:
x = 1 / 0
except
pass | try:
x = 1 / 0
except Exception:
pass | Specify exception type. | Python |
values[46] | if (length(values) >= 46) values[46] | Check length. | R |
result = test | result = 'test' | Quote strings. | Python |
echo 'data' | echo 'data'; | Add semicolon. | PHP |
WHERE id = '75' | WHERE id = 75 | Don't quote integer. | SQL |
$list[10] = 5; | if (isset($list[10])) $list[10] = 5; | Check existence. | PHP |
'test' + 11 | 'test' + 11.to_s | Convert int. | Ruby |
data[48] | if (data.indices.contains(48)) data[48] | Check index. | Kotlin |
<hr></hr> | <hr> | Self-closing. | HTML |
SELECT id role FROM items; | SELECT id, role FROM items; | Add comma. | SQL |
if [ $z = 26 ]; then | if [ "$z" = 26 ]; then | Quote variable. | Shell |
<p>world <b>data</p></b> | <p>world <b>data</b></p> | Nest properly. | HTML |
[79, 16, 81 | [79, 16, 81] | Close bracket. | Python |
def test():
print('data') | def test():
print('data') | Indent function body. | Python |
def foo
puts 'message'
end | def foo
puts 'message'
end | Correct. | Ruby |
list:
- item1
- item2 | list:
- item1
- item2 | Correct. | YAML |
data(84) | if length(data) >= 84, data(84), end | Check length. | MATLAB |
{{'title':'result'}} | {{"title":"result"}} | Use double quotes. | JSON |
<div><p>test</div></p> | <div><p>test</p></div> | Nest properly. | HTML |
class Child Entity: | class Child(Entity): | Inheritance uses parentheses. | Python |
if ($a = 6) | if ($a == 6) | Use ==. | Perl |
<?php
// code
?> | <?php
// code
?> | Correct. | PHP |
item = 6 | item=6 | No spaces. | Shell |
compute | compute() | Add parentheses. | Swift |
if (z = 100) {{}} | if (z == 100) {{}} | Use ==. | Kotlin |
const p:Person = {{name:'world'}}; | const p:Person = {{name:'world', age:43}}; | Add missing property. | TypeScript |
raise 'message' | raise Exception('message') | Raise needs an exception class. | Python |
'value' + 4 | 'value' + str(4) | Can't add int to string. | Python |
<div color=blue> | <div style='color:blue;'> | Use style attribute. | CSS |
def process(temp):
return temp + 1 | def process(temp):
return temp + 1 | Correct. | Python |
let text = String::from("info"); let borrow=&text; text.push_str("!"); | let mut text = String::from("info"); let borrow=&text; println!("{{}}", borrow); text.push_str("!"); | Cannot mutate while borrowed. | Rust |
if (num = 13) | if (num == 13) | Use ==. | C++ |
<entry><desc>hello</desc><name>95</name></entry | <entry><desc>hello</desc><name>95</name></entry> | Add closing >. | XML |
class Person {{ int index; }}
obj.index=5; | class Person {{ public int index; }}
obj.index=5; | Make field public. | Java |
assert x > 20 | assert x > 20 | Correct. | Python |
fmt.Println 'hello' | fmt.Println('hello') | Missing parentheses. | Go |
function render() {{ echo 'info'; }} | function render() {{ echo 'info'; }} | Correct. | PHP |
package main
func main() {{}} | package main
import 'fmt'
func main() {{}} | Import needed. | Go |
int main() {{ return 0; }} | int main() {{ return 0; }} | Correct. | C++ |
#footer {{ color: #333; }} | #footer {{ color: #333; }} | Correct. | CSS |
for data in range(97)
print(data) | for data in range(97):
print(data) | Colon after for. | Python |
Order.save(); | Order.save().then(()=>{{}}).catch(err=>{{}}); | Handle promise. | Node.js |
if (y = 91) | if (y == 91) | Use ==. | R |
class = 'hello' | class_name = 'hello' | 'class' is a keyword. | Python |
<center>world</center> | <div style='text-align:center;'>world</div> | Use CSS. | HTML |
[95, 68, 52 | [95, 68, 52] | Close bracket. | Ruby |
cin >> foo; | int foo;
cin >> foo; | Declare variable. | C++ |
bar | bar() | Add parentheses. | Kotlin |
my @arr = (94,57,2); | my @arr = (94,57,2); | Correct. | Perl |
x := 63 | x := 63 | Correct. | Go |
function render(): void {{ return 92; }} | function render(): number {{ return 92; }} | Return type mismatch. | TypeScript |
if (result = 19) {{}} | if (result === 19) {{}} | Use === for equality. | JavaScript |
list[34] | if list.indices.contains(34) {{ list[34] }} | Check index. | Swift |
{{"id":"world",}} | {{"id":"world"}} | Remove trailing comma. | JSON |
function process() {{
return
{{key:'info'}}
}} | function process() {{
return {{key:'info'}};
}} | Return object on same line. | JavaScript |
let item: number | null = null; item.toFixed(79); | let item: number | null = null; if(item!==null) item.toFixed(79); | Null check. | TypeScript |
<user name='info'/> | <user name="info"/> | Double quotes. | XML |
fn foo() -> i32 {{ 4 }} | fn foo() -> i32 {{ 4 }} | Correct. | Rust |
print('result') | print('result') | Correct. | R |
disp('world') | disp('world') | Correct. | MATLAB |
// comment | /* comment */ | Use /* */. | CSS |
["message", 93] | ["message", 93] | Correct. | JSON |
public static void main(String[] args) {{}} | public static void main(String[] args) {{}} | Correct. | Java |
'28' + 64 | 28 + 64 | Avoid string coercion. | JavaScript |
if ($bar = 46) {{}} | if ($bar -eq 46) {{}} | Use -eq. | PowerShell |
h1 {{ font-size:8px color:green; }} | h1 {{ font-size:8px; color:green; }} | Add semicolon. | CSS |
for (index in data) | for (index of data) | for...in iterates keys. | JavaScript |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.