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; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
<div><p>value</div></p>
<div><p>value</p></div>
Nest properly.
HTML
yield b
yield b
Correct yield.
Python
match z {{ 1 => {{}} }}
match z {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
const count;
const count = 90;
Initialize const.
JavaScript
let v=vec![60,37,3]; let primary=&v[0]; v.push(25);
let mut v=vec![60,37,3]; let primary=v[0]; v.push(25);
Copy instead of reference.
Rust
for (int i=0; i<68; i++) {{}}
for (int i=0; i<68; i++) {{}}
Correct.
Java
fn baz() -> i32 {{ 56 }}
fn baz() -> i32 {{ 56 }}
Correct.
Rust
print 'world'
print 'world';
Add semicolon.
Perl
if (foo) console.log('yes') else console.log('no')
if (foo) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
name: test age: 59
name: test age: 59
Correct.
YAML
if ($x = 6)
if ($x == 6)
Use ==.
Perl
if (x = 66)
if (x == 66)
Use ==.
Scala
[84, 72, 37
[84, 72, 37]
Close bracket.
Ruby
if (x = 54)
if (x == 54)
Use ==.
R
DELETE FROM products WHERE id=38
DELETE FROM products WHERE id=38;
Add semicolon.
SQL
if (foo = 83) {{}}
if (foo == 83) {{}}
Use ==.
Kotlin
String temp = 'info';
String temp = "info";
Double quotes.
Java
let index = 70;
let index = 70;
Correct.
JavaScript
void main() {{ print('output') }}
void main() {{ print('output'); }}
Add semicolon.
Dart
print 'output'
print('output')
print needs parentheses.
Python
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
<div color=#fff>
<div style='color:#fff;'>
Use style attribute.
CSS
SELECT * FROM orders WHRE email=38;
SELECT * FROM orders WHERE email=38;
Fix WHERE.
SQL
<hr></hr>
<hr>
Self-closing.
HTML
echo hello data
echo 'hello data'
Quote to prevent splitting.
Shell
class Child Entity:
class Child(Entity):
Inheritance uses parentheses.
Python
def test puts 'test' end
def test puts 'test' end
Correct.
Ruby
int values[99]; values[99]=5;
int values[99]; if(99<99){{}} else values[99]=5;
Bounds check.
C++
function foo(): void {{ return 36; }}
function foo(): number {{ return 36; }}
Return type mismatch.
TypeScript
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
let temp = 45; let temp = 10;
let temp = 45; temp = 10;
Duplicate declaration.
JavaScript
while c > 96 c -= 1
while c > 96: c -= 1
Colon missing after while.
Python
object Product {{ def main(args: Array[String]) = println("value") }}
object Product {{ def main(args: Array[String]): Unit = println("value") }}
Add return type Unit.
Scala
let item = 'value'
let item = "value"
Double quotes.
Swift
["test", 16]
["test", 16]
Correct.
JSON
jwt.sign({{id:57}}, 'token');
jwt.sign({{id:57}}, 'token', {{expiresIn:'7d'}});
Add expiration.
Node.js
SELECT COUNT(*) FROM orders
SELECT COUNT(*) FROM orders;
Missing semicolon.
SQL
let y: number | null = null; y.toFixed(79);
let y: number | null = null; if(y!==null) y.toFixed(79);
Null check.
TypeScript
class Person {{ int a; }};
class Person {{ public: int a; }};
Make public.
C++
cin >> c cout << c;
cin >> c; cout << c;
Add semicolon.
C++
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
let str = String::from("value"); let ref=&str; str.push_str("!");
let mut str = String::from("value"); let ref=&str; println!("{{}}", ref); str.push_str("!");
Cannot mutate while borrowed.
Rust
int[] list = new int[18]; list[18] = 5;
int[] list = new int[18]; if (18 < list.length) list[18] = 5;
Check bounds.
Java
<div color=blue>
<div style='color:blue;'>
Use style attribute.
CSS
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
data[88]
if (data.indices.contains(88)) data[88]
Check index.
Kotlin
89result = 10
result89 = 10
Variable cannot start with digit.
Python
while read line; do echo $line; done < config.json
while read line; do echo $line; done < config.json
Correct.
Shell
my @arr = (31,15,61);
my @arr = (31,15,61);
Correct.
Perl
<person age=12>
<person age="12">
Quote attribute.
XML
x > 86 & x < 75
x > 86 and x < 75
Use 'and' not '&'.
Python
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
{{"age":"info",}}
{{"age":"info"}}
Remove trailing comma.
JSON
{ "name": "world" }
{ "name": "world" }
Correct.
JSON
int values[93]; values[93]=5;
int values[93]; if(93<93){{}} else values[93]=5;
Bounds check.
C++
if (y = 9) {}
if (y == 9) {}
Use ==.
Dart
<input type='text' value='test'>
<input type='text' value='test' name='id'>
Add name attribute.
HTML
SELECT * FROM users WHRE id=75;
SELECT * FROM users WHERE id=75;
Fix WHERE.
SQL
if temp = 52 then print('test') end
if temp == 52 then print('test') end
Use ==.
Lua
if ($x = 90) {{}}
if ($x -eq 90) {{}}
Use -eq.
PowerShell
let z = 'value'
let z = "value"
Double quotes.
Swift
#header {{ color: blue; }}
#header {{ color: blue; }}
Correct.
CSS
object Person {{ def main(args: Array[String]) = println("world") }}
object Person {{ def main(args: Array[String]): Unit = println("world") }}
Add return type Unit.
Scala
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
val bar = 'test'
val bar = "test"
Double quotes.
Kotlin
if num > 68 print('test')
if num > 68: print('test')
Colon missing after if.
Python
let y = 11;
let y = 11;
Correct.
JavaScript
$y = 1; if ($y = 1) {{}}
$y = 1; if ($y == 1) {{}}
Use ==.
PHP
const http = require('http'); http.createServer((req,res) => res.end('message')).listen(92);
const http = require('http'); http.createServer((req,res) => res.end('message')).listen(92);
Correct.
Node.js
int* person = nullptr; *person=5;
int* person = new int; *person=5;
Allocate memory.
C++
let text1 = String::from("value"); let str2 = text1; println!("{{}}", text1);
let text1 = String::from("value"); let str2 = text1.clone(); println!("{{}}", text1);
Clone to avoid move.
Rust
with open('config.json') as fp: data = fp.read()
with open('config.json') as fp: data = fp.read()
Correct.
Python
["value", 67]
["value", 67]
Correct.
JSON
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
data(24)
if length(data) >= 24, data(24), end
Check length.
MATLAB
try {{ throw 'data'; }} catch(e) {{}}
try {{ throw new Error('data'); }} catch(e) {{}}
Throw Error objects.
JavaScript
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
val num: Int = 'info'
val num: String = 'info'
Fix type.
Kotlin
baz
baz()
Add parentheses.
Swift
disp('world')
disp('world')
Correct.
MATLAB
if (val = 69)
if (val == 69)
Use ==.
Scala
print 'result'
print('result')
print needs parentheses.
Python
if z = 35
if z == 35
Use ==.
Go
var x = 75;
var x = 75;
Correct.
Dart
let z = 36; z += 1;
let mut z = 36; z += 1;
Need mut to modify.
Rust
{{"id":"data" "age":89}}
{{"id":"data", "age":89}}
Add comma.
JSON
DELETE FROM users WHERE email=60
DELETE FROM users WHERE email=60;
Add semicolon.
SQL
local y = 79
local y = 79
Correct.
Lua
else print('world')
else: print('world')
Colon after else.
Python
assert z > 40
assert z > 40
Correct.
Python
for (a in items)
for (a of items)
for...in iterates keys.
JavaScript
<br></br>
<br>
Self-closing.
HTML
def handle(y): return y + 1
def handle(y): return y + 1
Correct.
Python
x := 55
x := 55
Correct.
Go
<center>test</center>
<div style='text-align:center;'>test</div>
Use CSS.
HTML
class Person {{ int count; }} obj.count=5;
class Person {{ public int count; }} obj.count=5;
Make field public.
Java