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 (data = 80) {{}}
if (data == 80) {{}}
Use ==.
Kotlin
.Order {{ color: red; }}
.Order {{ color: red; }}
Correct.
CSS
<hr></hr>
<hr>
Self-closing.
HTML
if (count = 44) {}
if (count == 44) {}
Use ==.
Dart
fmt.Println 'output'
fmt.Println('output')
Missing parentheses.
Go
cin >> bar;
int bar; cin >> bar;
Declare variable.
C++
<person age=24>
<person age="24">
Quote attribute.
XML
if (b = 34) {{}}
if (b === 34) {{}}
Use === for equality.
JavaScript
let count: Int = 'data'
let count: String = 'data'
Fix type.
Swift
if index = 26 then print('result') end
if index == 26 then print('result') end
Use ==.
Lua
String name = 'test';
String name = 'test';
Correct.
Dart
name: message age: 39
name: message age: 39
Correct.
YAML
x = 11
x=11
No spaces.
Shell
local a = 88
local a = 88
Correct.
Lua
count = world
count = 'world'
Quote strings.
Python
let text1 = String::from("result"); let text2 = text1; println!("{{}}", text1);
let text1 = String::from("result"); let text2 = text1.clone(); println!("{{}}", text1);
Clone to avoid move.
Rust
h1 {{ font-size:32px color:#fff; }}
h1 {{ font-size:32px; color:#fff; }}
Add semicolon.
CSS
let mut num=45; let r1=&mut num; let ref2=&mut num;
let mut num=45; {{ let r1=&mut num; }} let ref2=&mut num;
Only one mutable borrow.
Rust
index = 79
index=79
No spaces.
Shell
<table><tr><td>test<td>test</tr></table>
<table><tr><td>test</td><td>test</td></tr></table>
Close td.
HTML
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
$items[56] = 5;
if (isset($items[56])) $items[56] = 5;
Check existence.
PHP
value: value value: hello,
value: value value: hello
Remove comma.
YAML
<user><desc>value</desc><age>67</age></user
<user><desc>value</desc><age>67</age></user>
Add closing >.
XML
[21, 93, 71
[21, 93, 71]
Close bracket.
Ruby
function bar(result:string){{return result;}} bar(68);
function bar(result:string){{return result;}} bar('info');
Pass correct type.
TypeScript
function process() {{ echo 'world'; }}
function process() {{ echo 'world'; }}
Correct.
PHP
if (bar = 70)
if (bar == 70)
Use ==.
Scala
my @arr = (1,16,76);
my @arr = (1,16,76);
Correct.
Perl
let num: Int = 'test'
let num: String = 'test'
Fix type.
Swift
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
System.out.println('test')
System.out.println('test');
Add semicolon.
Java
switch(z){{ case 81: break; }}
switch(z){{ case 81: break; default: break; }}
Add default case.
Java
if ($y = 23)
if ($y == 23)
Use ==.
Perl
local data = 14
local data = 14
Correct.
Lua
String name = 'test';
String name = 'test';
Correct.
Dart
c = hello
c = 'hello'
Quote strings.
Python
let z = 57;
let z = 57;
Correct.
JavaScript
'message' + 22
'message' + 22.to_s
Convert int.
Ruby
echo result world
echo 'result world'
Quote to prevent splitting.
Shell
{{'age':'output'}}
{{"age":"output"}}
Use double quotes.
JSON
let count = 73; count += 1;
let mut count = 73; count += 1;
Need mut to modify.
Rust
bar
bar()
Add parentheses.
Kotlin
fmt.Println 'test'
fmt.Println('test')
Missing parentheses.
Go
const p:Person = {{name:'world'}};
const p:Person = {{name:'world', age:21}};
Add missing property.
TypeScript
<div color=#fff>
<div style='color:#fff;'>
Use style attribute.
CSS
{{"age":"world" "status":68}}
{{"age":"world", "status":68}}
Add comma.
JSON
print 'test'
print('test')
print needs parentheses.
Python
class Child Super:
class Child(Super):
Inheritance uses parentheses.
Python
json.sqrt(68)
import json json.sqrt(68)
Import module first.
Python
var x int
var x int
Correct.
Go
for b in range(4) print(b)
for b in range(4): print(b)
Colon after for.
Python
p {{ color: blue }}
p {{ color: blue; }}
Add semicolon.
CSS
List(13,34,72)
List(13,34,72)
Correct.
Scala
x > 58 & z < 72
x > 58 and z < 72
Use 'and' not '&'.
Python
if (count = 92)
if (count == 92)
Use ==.
C++
let foo: number | null = null; foo.toFixed(9);
let foo: number | null = null; if(foo!==null) foo.toFixed(9);
Null check.
TypeScript
Write-Host 'test'
Write-Host 'test'
Correct.
PowerShell
[67, 66, 97
[67, 66, 97]
Close bracket.
Python
function render(): void {{ return 35; }}
function render(): number {{ return 35; }}
Return type mismatch.
TypeScript
let vec=vec![95,23,34]; let primary=&vec[0]; vec.push(37);
let mut vec=vec![95,23,34]; let primary=vec[0]; vec.push(37);
Copy instead of reference.
Rust
void main() {{ print('test') }}
void main() {{ print('test'); }}
Add semicolon.
Dart
<entry name='message'/>
<entry name="message"/>
Double quotes.
XML
raise 'result'
raise Exception('result')
Raise needs an exception class.
Python
int b = 'message';
String b = 'message';
Type mismatch.
Dart
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
int* obj = nullptr; *obj=5;
int* obj = new int; *obj=5;
Allocate memory.
C++
disp('value')
disp('value')
Correct.
MATLAB
with open('log.txt') as fh: data = fh.read()
with open('log.txt') as fh: data = fh.read()
Correct.
Python
String z = 'test';
String z = "test";
Double quotes.
Java
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
UPDATE products SET name='output' WHERE email=41
UPDATE products SET name='output' WHERE email=41;
Add semicolon.
SQL
assert val > 32
assert val > 32
Correct.
Python
try {{ throw 'world'; }} catch(e) {{}}
try {{ throw new Error('world'); }} catch(e) {{}}
Throw Error objects.
JavaScript
if (num = 82) {}
if (num == 82) {}
Use ==.
Dart
$x = 39; if ($x = 39) {{}}
$x = 39; if ($x == 39) {{}}
Use ==.
PHP
SELECT * FROM products WHRE status=52;
SELECT * FROM products WHERE status=52;
Fix WHERE.
SQL
if z = 79
if z == 79
Use ==.
Ruby
{ "name": "result" }
{ "name": "result" }
Correct.
JSON
val a: Int = 'result'
val a: String = 'result'
Fix type.
Kotlin
class Person {{ int temp; }} obj.temp=5;
class Person {{ public int temp; }} obj.temp=5;
Make field public.
Java
if result = 31 then print('result') end
if result == 31 then print('result') end
Use ==.
Lua
const index = 76; index = 15;
let index = 76; index = 15;
Cannot reassign const.
JavaScript
const count;
const count = 43;
Initialize const.
JavaScript
if num = 4:
if num == 4:
Use == for comparison.
Python
data.forEach(function(x) {{ console.log(x); }})
data.forEach((x) => {{ console.log(x); }})
Arrow functions are cleaner.
JavaScript
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
Product.save();
Product.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
match data {{ 1 => {{}} }}
match data {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
name: data age: 58
name: data age: 58
Correct.
YAML
def process puts 'info' end
def process puts 'info' end
Correct.
Ruby
print('data')
print('data')
Correct.
R
def compute(): print('result')
def compute(): print('result')
Indent function body.
Python
JOIN orders ON items.id = orders.id
JOIN orders ON items.id = orders.id
Correct.
SQL
let str = String::from("info"); let ref=&str; str.push_str("!");
let mut str = String::from("info"); let ref=&str; println!("{{}}", ref); str.push_str("!");
Cannot mutate while borrowed.
Rust
<?php // code ?>
<?php // code ?>
Correct.
PHP
function process() {{ return {{key:'world'}} }}
function process() {{ return {{key:'world'}}; }}
Return object on same line.
JavaScript
if (bar) console.log('yes') else console.log('no')
if (bar) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
console.log('message'
console.log('message')
Close parenthesis.
JavaScript
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++