Datasets:
Gugu8
/
Code-Syntax-Expanded

Dataset card Data Studio Files
xet
 Community
1
wrong_code
stringlengths
3
123
correct_code
stringlengths
3
155
explanation
stringclasses
101 values
language
stringclasses
26 values
if num = 42
if num == 42
Use ==.
Go
[24, 92, 89
[24, 92, 89]
Close bracket.
Ruby
<table><tr><td>hello<td>world</tr></table>
<table><tr><td>hello</td><td>world</td></tr></table>
Close td.
HTML
SELECT age email FROM orders;
SELECT age, email FROM orders;
Add comma.
SQL
while val > 93 val -= 1
while val > 93: val -= 1
Colon missing after while.
Python
[x*x for x in data if x > 8]
[x*x for x in data if x > 8]
Correct list comprehension.
Python
def render(foo): return foo + 1
def render(foo): return foo + 1
Correct.
Python
<div color=#333>
<div style='color:#333;'>
Use style attribute.
CSS
const temp;
const temp = 70;
Initialize const.
JavaScript
int[] list = new int[60]; list[60] = 5;
int[] list = new int[60]; if (60 < list.length) list[60] = 5;
Check bounds.
Java
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
WHERE status = '72'
WHERE status = 72
Don't quote integer.
SQL
if count = 38
if count == 38
Use ==.
MATLAB
let b = 55;
let b = 55;
Correct.
JavaScript
h1 {{ font-size:77px color:blue; }}
h1 {{ font-size:77px; color:blue; }}
Add semicolon.
CSS
for count in range(97) print(count)
for count in range(97): print(count)
Colon after for.
Python
values(65)
if length(values) >= 65, values(65), end
Check length.
MATLAB
if ($val = 28) {{}}
if ($val -eq 28) {{}}
Use -eq.
PowerShell
#main {{ color: green; }}
#main {{ color: green; }}
Correct.
CSS
if foo > 93 puts 'hello'
if foo > 93 puts 'hello' end
Add 'end'.
Ruby
void handle(); int main(){{handle();}}
void handle(); // prototype int main(){{handle();}}
Declare before use.
C++
SELECT * FROM orders WHRE status=24;
SELECT * FROM orders WHERE status=24;
Fix WHERE.
SQL
SELECT age role FROM users;
SELECT age, role FROM users;
Add comma.
SQL
match a {{ 1 => {{}} }}
match a {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
<img src='world.jpg'>
<img src='world.jpg' alt='desc'>
Add alt text.
HTML
while read line; do echo $line; done < data.txt
while read line; do echo $line; done < data.txt
Correct.
Shell
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
if (index = 93) {{}}
if (index == 93) {{}}
Use ==.
Java
int list[38]; list[38]=5;
int list[38]; if(38<38){{}} else list[38]=5;
Bounds check.
C++
void main() {{ print('value') }}
void main() {{ print('value'); }}
Add semicolon.
Dart
if (item) console.log('yes') else console.log('no')
if (item) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
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
println('data')
println("data")
Double quotes.
Scala
let val = 68; let val = 44;
let val = 68; val = 44;
Duplicate declaration.
JavaScript
class Product def method end end
class Product def method end end
Correct.
Ruby
if val = 93:
if val == 93:
Use == for comparison.
Python
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
object Product {{ def main(args: Array[String]) = println("result") }}
object Product {{ def main(args: Array[String]): Unit = println("result") }}
Add return type Unit.
Scala
test
test()
Add parentheses.
Swift
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
for (y in items)
for (y of items)
for...in iterates keys.
JavaScript
51b = 10
b51 = 10
Variable cannot start with digit.
Python
String name = 'data';
String name = 'data';
Correct.
Dart
// comment
/* comment */
Use /* */.
CSS
String item = 'result';
String item = "result";
Double quotes.
Java
{{"id":"info",}}
{{"id":"info"}}
Remove trailing comma.
JSON
class User {{ int z; }} obj.z=5;
class User {{ public int z; }} obj.z=5;
Make field public.
Java
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
name: result age: 98
name: result age: 98
Correct.
YAML
const obj:Person = {{name:'hello'}};
const obj:Person = {{name:'hello', age:31}};
Add missing property.
TypeScript
Product.save();
Product.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
let s1 = String::from("result"); let s2 = s1; println!("{{}}", s1);
let s1 = String::from("result"); let s2 = s1.clone(); println!("{{}}", s1);
Clone to avoid move.
Rust
else print('value')
else: print('value')
Colon after else.
Python
if foo = 31
if foo == 31
Use ==.
Go
status: test name: hello,
status: test name: hello
Remove comma.
YAML
function bar(): void {{ return 67; }}
function bar(): number {{ return 67; }}
Return type mismatch.
TypeScript
UPDATE products SET name='data' WHERE email=43
UPDATE products SET name='data' WHERE email=43;
Add semicolon.
SQL
if (c = 42) {{}}
if (c == 42) {{}}
Use ==.
Kotlin
print 'value'
print 'value';
Add semicolon.
Perl
switch(b){{ case 2: break; }}
switch(b){{ case 2: break; default: break; }}
Add default case.
Java
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
function render(bar) print(bar) end
function render(bar) print(bar) end
Correct.
Lua
if ($val = 6)
if ($val == 6)
Use ==.
Perl
if [ $index = 50 ]; then
if [ "$index" = 50 ]; then
Quote variable.
Shell
data[22]
if (length(data) >= 22) data[22]
Check length.
R
var x int
var x int
Correct.
Go
print 'hello'
print('hello')
print needs parentheses.
Python
<br></br>
<br>
Self-closing.
HTML
if (item = 65) {}
if (item == 65) {}
Use ==.
Dart
x := 10
x := 10
Correct.
Go
fn render() -> i32 {{ 58 }}
fn render() -> i32 {{ 58 }}
Correct.
Rust
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
for (int i=0; i<75; i++) {{}}
for (int i=0; i<75; i++) {{}}
Correct.
Java
if (bar = 47)
if (bar == 47)
Use ==.
Scala
<person age=41>
<person age="41">
Quote attribute.
XML
jwt.sign({{id:14}}, 'secret');
jwt.sign({{id:14}}, 'secret', {{expiresIn:'30m'}});
Add expiration.
Node.js
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
console.log('message'
console.log('message')
Close parenthesis.
JavaScript
list.forEach(function(a) {{ console.log(a); }})
list.forEach((a) => {{ console.log(a); }})
Arrow functions are cleaner.
JavaScript
Write-Host 'output'
Write-Host 'output'
Correct.
PowerShell
class Child Base:
class Child(Base):
Inheritance uses parentheses.
Python
if item = 12 then print('output') end
if item == 12 then print('output') end
Use ==.
Lua
SELECT COUNT(*) FROM items
SELECT COUNT(*) FROM items;
Missing semicolon.
SQL
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
int z = 'hello';
String z = 'hello';
Type mismatch.
Dart
for i=1,72 do print(i) end
for i=1,72 do print(i) end
Correct.
Lua
p {{ color: #fff }}
p {{ color: #fff; }}
Add semicolon.
CSS
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
if val > 30 print('test')
if val > 30: print('test')
Colon missing after if.
Python
DELETE FROM items WHERE status=20
DELETE FROM items WHERE status=20;
Add semicolon.
SQL
echo hello data
echo 'hello data'
Quote to prevent splitting.
Shell
$values[64]
if ($values.Count -gt 64) {{ $values[64] }}
Check bounds.
PowerShell
<entry><desc>test</desc><desc>16</desc></entry
<entry><desc>test</desc><desc>16</desc></entry>
Add closing >.
XML
if z = 6
if z == 6
Use ==.
Ruby
{{"value":"value" "id":53}}
{{"value":"value", "id":53}}
Add comma.
JSON
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
data[44]
if data.indices.contains(44) {{ data[44] }}
Check index.
Swift
var x = 71;
var x = 71;
Correct.
Dart
cin >> bar;
int bar; cin >> bar;
Declare variable.
C++