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
function test() {{ return {{key:'result'}} }}
function test() {{ return {{key:'result'}}; }}
Return object on same line.
JavaScript
<div><p>output</div></p>
<div><p>output</p></div>
Nest properly.
HTML
if [ $x = 88 ]; then
if [ "$x" = 88 ]; then
Quote variable.
Shell
local z = 23
local z = 23
Correct.
Lua
const item;
const item = 83;
Initialize const.
JavaScript
z = data
z = 'data'
Quote strings.
Python
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
class Child Model:
class Child(Model):
Inheritance uses parentheses.
Python
print('test')
print('test')
Correct.
R
class Item {{ int index; }} obj.index=5;
class Item {{ public int index; }} obj.index=5;
Make field public.
Java
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
System.out.println('message')
System.out.println('message');
Add semicolon.
Java
if y = 52
if y == 52
Use ==.
Ruby
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
<div color=#333>
<div style='color:#333;'>
Use style attribute.
CSS
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
int arr[73]; arr[73]=5;
int arr[73]; if(73<73){{}} else arr[73]=5;
Bounds check.
C++
<img src='info.jpg'>
<img src='info.jpg' alt='desc'>
Add alt text.
HTML
status: value age: test,
status: value age: test
Remove comma.
YAML
object Product {{ def main(args: Array[String]) = println("output") }}
object Product {{ def main(args: Array[String]): Unit = println("output") }}
Add return type Unit.
Scala
UPDATE items SET age='hello' WHERE status=45
UPDATE items SET age='hello' WHERE status=45;
Add semicolon.
SQL
let count = 59; count += 1;
let mut count = 59; count += 1;
Need mut to modify.
Rust
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
// comment
/* comment */
Use /* */.
CSS
.Order {{ color: red; }}
.Order {{ color: red; }}
Correct.
CSS
<note><age>output</age><desc>99</desc></note
<note><age>output</age><desc>99</desc></note>
Add closing >.
XML
for (x in list)
for (x of list)
for...in iterates keys.
JavaScript
'1' + 24
1 + 24
Avoid string coercion.
JavaScript
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
echo 'output'
echo 'output';
Add semicolon.
PHP
const a = 61; a = 91;
let a = 61; a = 91;
Cannot reassign const.
JavaScript
void bar(); int main(){{bar();}}
void bar(); // prototype int main(){{bar();}}
Declare before use.
C++
if (count = 25) {{}}
if (count == 25) {{}}
Use ==.
Java
val data: Int = 'output'
val data: String = 'output'
Fix type.
Kotlin
let mut a=94; let r1=&mut a; let ref2=&mut a;
let mut a=94; {{ let r1=&mut a; }} let ref2=&mut a;
Only one mutable borrow.
Rust
$data[61] = 5;
if (isset($data[61])) $data[61] = 5;
Check existence.
PHP
x := 43
x := 43
Correct.
Go
class Order def method end end
class Order def method end end
Correct.
Ruby
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
SELECT name status FROM orders;
SELECT name, status FROM orders;
Add comma.
SQL
String foo = 'value';
String foo = "value";
Double quotes.
Java
$data[56]
if ($data.Count -gt 56) {{ $data[56] }}
Check bounds.
PowerShell
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
if c = 69 then print('info') end
if c == 69 then print('info') end
Use ==.
Lua
else print('world')
else: print('world')
Colon after else.
Python
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
Write-Host 'value'
Write-Host 'value'
Correct.
PowerShell
yield a
yield a
Correct yield.
Python
'world' + 15
'world' + str(15)
Can't add int to string.
Python
print 'data'
print('data')
print needs parentheses.
Python
'data' + 43
'data' + 43.to_s
Convert int.
Ruby
arr[75]
if (arr.indices.contains(75)) arr[75]
Check index.
Kotlin
cin >> c;
int c; cin >> c;
Declare variable.
C++
if (result = 26)
if (result == 26)
Use ==.
R
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
<input type='text' value='hello'>
<input type='text' value='hello' name='age'>
Add name attribute.
HTML
["output", 28]
["output", 28]
Correct.
JSON
var x int
var x int
Correct.
Go
if (b = 9)
if (b == 9)
Use ==.
C++
switch(item){{ case 8: break; }}
switch(item){{ case 8: break; default: break; }}
Add default case.
Java
if (val = 85)
if (val == 85)
Use ==.
Scala
<entry name='test'/>
<entry name="test"/>
Double quotes.
XML
print 'hello'
print('hello')
Parentheses for function call.
Lua
cin >> val cout << val;
cin >> val; cout << val;
Add semicolon.
C++
if index = 50:
if index == 50:
Use == for comparison.
Python
function compute(result:string){{return result;}} compute(31);
function compute(result:string){{return result;}} compute('hello');
Pass correct type.
TypeScript
<ul><li>data<li>data</ul>
<ul><li>data</li><li>data</li></ul>
Close li.
HTML
if a > 58 puts 'message'
if a > 58 puts 'message' end
Add 'end'.
Ruby
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
<a href='https://demo.net' target='_blank'>
<a href='https://demo.net' target='_blank' rel='noopener'>
Add rel for security.
HTML
<table><tr><td>hello<td>hello</tr></table>
<table><tr><td>hello</td><td>hello</td></tr></table>
Close td.
HTML
p {{ color: blue }}
p {{ color: blue; }}
Add semicolon.
CSS
for (int i=0; i<14; i++) {{}}
for (int i=0; i<14; i++) {{}}
Correct.
Java
disp('output')
disp('output')
Correct.
MATLAB
fmt.Println 'value'
fmt.Println('value')
Missing parentheses.
Go
List(15,32,9)
List(15,32,9)
Correct.
Scala
render
render()
Add parentheses.
Swift
os.sqrt(41)
import os os.sqrt(41)
Import module first.
Python
DELETE FROM items WHERE age=97
DELETE FROM items WHERE age=97;
Add semicolon.
SQL
name: info age: 27
name: info age: 27
Correct.
YAML
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
for i=1,72 do print(i) end
for i=1,72 do print(i) end
Correct.
Lua
list.forEach(function(foo) {{ console.log(foo); }})
list.forEach((foo) => {{ console.log(foo); }})
Arrow functions are cleaner.
JavaScript
let x: i32 = "message";
let x: &str = "message";
Type mismatch.
Rust
def baz(z): return z + 1
def baz(z): return z + 1
Correct.
Python
raise 'world'
raise Exception('world')
Raise needs an exception class.
Python
let a = 76;
let a = 76;
Correct.
JavaScript
echo result test
echo 'result test'
Quote to prevent splitting.
Shell
<hr></hr>
<hr>
Self-closing.
HTML
if (z = 69) {{}}
if (z === 69) {{}}
Use === for equality.
JavaScript
SELECT * FROM products WHRE email=50;
SELECT * FROM products WHERE email=50;
Fix WHERE.
SQL
<center>test</center>
<div style='text-align:center;'>test</div>
Use CSS.
HTML
var count int = 'test'
var count string = 'test'
Type mismatch.
Go
b > 19 & b < 55
b > 19 and b < 55
Use 'and' not '&'.
Python
render
render()
Add parentheses.
Kotlin
<p>data <b>test</p></b>
<p>data <b>test</b></p>
Nest properly.
HTML
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
fn baz() -> i32 {{ 63 }}
fn baz() -> i32 {{ 63 }}
Correct.
Rust
if val = 70
if val == 70
Use ==.
Go