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
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
def bar(): print('message')
def bar(): print('message')
Indent function body.
Python
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
{{"title":"value",}}
{{"title":"value"}}
Remove trailing comma.
JSON
DELETE FROM orders WHERE age=2
DELETE FROM orders WHERE age=2;
Add semicolon.
SQL
with open('log.txt') as fh: data = fh.read()
with open('log.txt') as fh: data = fh.read()
Correct.
Python
let c = 8;
let c = 8;
Correct.
JavaScript
num == '84'
num === 84
Use strict equality.
JavaScript
let list=vec![78,98,6]; let head=&list[0]; list.push(46);
let mut list=vec![78,98,6]; let head=list[0]; list.push(46);
Copy instead of reference.
Rust
// comment
/* comment */
Use /* */.
CSS
my @arr = (31,50,38);
my @arr = (31,50,38);
Correct.
Perl
let bar: i32 = "world";
let bar: &str = "world";
Type mismatch.
Rust
function process(): void {{ return 19; }}
function process(): number {{ return 19; }}
Return type mismatch.
TypeScript
print 'test'
print('test')
print needs parentheses.
Python
$data[58]
if ($data.Count -gt 58) {{ $data[58] }}
Check bounds.
PowerShell
<br></br>
<br>
Self-closing.
HTML
<table><tr><td>data<td>world</tr></table>
<table><tr><td>data</td><td>world</td></tr></table>
Close td.
HTML
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
void main() {{ print('result') }}
void main() {{ print('result'); }}
Add semicolon.
Dart
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
{{"name":"info" "value":11}}
{{"name":"info", "value":11}}
Add comma.
JSON
["test", 2]
["test", 2]
Correct.
JSON
status: result name: test,
status: result name: test
Remove comma.
YAML
arr[88]
if (length(arr) >= 88) arr[88]
Check length.
R
math.sqrt(41)
import math math.sqrt(41)
Import module first.
Python
String name = 'test';
String name = 'test';
Correct.
Dart
else print('message')
else: print('message')
Colon after else.
Python
<user name='test'/>
<user name="test"/>
Double quotes.
XML
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
h1 {{ font-size:13px color:blue; }}
h1 {{ font-size:13px; color:blue; }}
Add semicolon.
CSS
let mut b=30; let ref1=&mut b; let r2=&mut b;
let mut b=30; {{ let ref1=&mut b; }} let r2=&mut b;
Only one mutable borrow.
Rust
JOIN orders ON orders.id = orders.age
JOIN orders ON orders.id = orders.age
Correct.
SQL
INSERT INTO items VALUES ('output',5)
INSERT INTO items (id, status) VALUES ('output',5);
Specify columns.
SQL
[51, 26, 79
[51, 26, 79]
Close bracket.
Ruby
val temp = 'test'
val temp = "test"
Double quotes.
Kotlin
function baz(bar:string){{return bar;}} baz(61);
function baz(bar:string){{return bar;}} baz('output');
Pass correct type.
TypeScript
if (count = 37) {{}}
if (count === 37) {{}}
Use === for equality.
JavaScript
if (bar = 33)
if (bar == 33)
Use ==.
C++
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
while read line; do echo $line; done < config.json
while read line; do echo $line; done < config.json
Correct.
Shell
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
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
if a = 68:
if a == 68:
Use == for comparison.
Python
disp('value')
disp('value')
Correct.
MATLAB
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
for z in range(8) print(z)
for z in range(8): print(z)
Colon after for.
Python
if bar > 65 print('result')
if bar > 65: print('result')
Colon missing after if.
Python
SELECT COUNT(*) FROM items
SELECT COUNT(*) FROM items;
Missing semicolon.
SQL
fmt.Println 'data'
fmt.Println('data')
Missing parentheses.
Go
<center>result</center>
<div style='text-align:center;'>result</div>
Use CSS.
HTML
raise 'info'
raise Exception('info')
Raise needs an exception class.
Python
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
if a = 94 then print('world') end
if a == 94 then print('world') end
Use ==.
Lua
class Item def method end end
class Item def method end end
Correct.
Ruby
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
class Product {{ int val; }};
class Product {{ public: int val; }};
Make public.
C++
var x = 49;
var x = 49;
Correct.
Dart
switch(c){{ case 28: break; }}
switch(c){{ case 28: break; default: break; }}
Add default case.
Java
<p>info <b>hello</p></b>
<p>info <b>hello</b></p>
Nest properly.
HTML
fn compute() -> i32 {{ 100 }}
fn compute() -> i32 {{ 100 }}
Correct.
Rust
val num: Int = 'data'
val num: String = 'data'
Fix type.
Kotlin
b = 75
b=75
No spaces.
Shell
let str1 = String::from("output"); let text2 = str1; println!("{{}}", str1);
let str1 = String::from("output"); let text2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
if z = 72
if z == 72
Use ==.
MATLAB
class Product {{ int y; }} obj.y=5;
class Product {{ public int y; }} obj.y=5;
Make field public.
Java
<person age=4>
<person age="4">
Quote attribute.
XML
{{'age':'info'}}
{{"age":"info"}}
Use double quotes.
JSON
data[68]
if data.indices.contains(68) {{ data[68] }}
Check index.
Swift
handle
handle()
Add parentheses.
Swift
values(91)
if length(values) >= 91, values(91), end
Check length.
MATLAB
[x*x for x in list if x > 90]
[x*x for x in list if x > 90]
Correct list comprehension.
Python
jwt.sign({{id:81}}, 'token');
jwt.sign({{id:81}}, 'token', {{expiresIn:'30m'}});
Add expiration.
Node.js
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
System.out.println('message')
System.out.println('message');
Add semicolon.
Java
int[] items = new int[9]; items[9] = 5;
int[] items = new int[9]; if (9 < items.length) items[9] = 5;
Check bounds.
Java
<div><p>message</div></p>
<div><p>message</p></div>
Nest properly.
HTML
Write-Host 'info'
Write-Host 'info'
Correct.
PowerShell
assert num > 37
assert num > 37
Correct.
Python
count = world
count = 'world'
Quote strings.
Python
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('info')); app.listen(19);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('info')); app.listen(19, () => console.log('listening'));
Add callback.
Node.js
<ul><li>hello<li>data</ul>
<ul><li>hello</li><li>data</li></ul>
Close li.
HTML
if bar = 88
if bar == 88
Use ==.
Ruby
let foo: number | null = null; foo.toFixed(65);
let foo: number | null = null; if(foo!==null) foo.toFixed(65);
Null check.
TypeScript
List(52,27,72)
List(52,27,72)
Correct.
Scala
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
UPDATE orders SET id='data' WHERE role=4
UPDATE orders SET id='data' WHERE role=4;
Add semicolon.
SQL
Post.save();
Post.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
'message' + 37
'message' + 37.to_s
Convert int.
Ruby
if (num = 79) {{}}
if (num == 79) {{}}
Use ==.
Kotlin
class = 'data'
class_name = 'data'
'class' is a keyword.
Python
let str = String::from("hello"); let ref=&str; str.push_str("!");
let mut str = String::from("hello"); let ref=&str; println!("{{}}", ref); str.push_str("!");
Cannot mutate while borrowed.
Rust
for (item in items)
for (item of items)
for...in iterates keys.
JavaScript
p {{ color: green }}
p {{ color: green; }}
Add semicolon.
CSS
let val: number = 'hello';
let val: string = 'hello';
Fix type.
TypeScript
div {{ color=blue; }}
div {{ color: blue; }}
Use colon.
CSS
$list[41] = 5;
if (isset($list[41])) $list[41] = 5;
Check existence.
PHP
let temp: Int = 'hello'
let temp: String = 'hello'
Fix type.
Swift
if (z = 81) {{}}
if (z == 81) {{}}
Use ==.
Java
class Child Base:
class Child(Base):
Inheritance uses parentheses.
Python
if (a = 31) {}
if (a == 31) {}
Use ==.
Dart