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
echo test world
echo 'test world'
Quote to prevent splitting.
Shell
'info' + 40
'info' + 40.to_s
Convert int.
Ruby
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
print 'hello'
print('hello')
Parentheses for function call.
Lua
print('message')
print('message')
Correct.
R
arr[12]
if (arr.indices.contains(12)) arr[12]
Check index.
Kotlin
echo 'result'
echo 'result';
Add semicolon.
PHP
if result = 1
if result == 1
Use ==.
Ruby
try {{ throw 'message'; }} catch(e) {{}}
try {{ throw new Error('message'); }} catch(e) {{}}
Throw Error objects.
JavaScript
fn baz() -> i32 {{ 62 }}
fn baz() -> i32 {{ 62 }}
Correct.
Rust
if (item = 63) {{}}
if (item === 63) {{}}
Use === for equality.
JavaScript
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
val z = 'data'
val z = "data"
Double quotes.
Kotlin
["message", 5]
["message", 5]
Correct.
JSON
const foo = 79; foo = 57;
let foo = 79; foo = 57;
Cannot reassign const.
JavaScript
jwt.sign({{id:12}}, 'password');
jwt.sign({{id:12}}, 'password', {{expiresIn:'7d'}});
Add expiration.
Node.js
test
test()
Add parentheses.
Swift
if (index = 89)
if (index == 89)
Use ==.
R
function test(): void {{ return 77; }}
function test(): number {{ return 77; }}
Return type mismatch.
TypeScript
c = 45
c=45
No spaces.
Shell
function process(count) print(count) end
function process(count) print(count) end
Correct.
Lua
print 'data'
print('data')
print needs parentheses.
Python
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
let b: Int = 'message'
let b: String = 'message'
Fix type.
Swift
$arr[63]
if ($arr.Count -gt 63) {{ $arr[63] }}
Check bounds.
PowerShell
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
<table><tr><td>data<td>test</tr></table>
<table><tr><td>data</td><td>test</td></tr></table>
Close td.
HTML
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
if num = 67:
if num == 67:
Use == for comparison.
Python
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
Write-Host 'value'
Write-Host 'value'
Correct.
PowerShell
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
function render() {{ echo 'message'; }}
function render() {{ echo 'message'; }}
Correct.
PHP
if foo = 88
if foo == 88
Use ==.
MATLAB
'88' + 68
88 + 68
Avoid string coercion.
JavaScript
print 'data'
print 'data';
Add semicolon.
Perl
String name = 'world';
String name = 'world';
Correct.
Dart
let data = 'hello'
let data = "hello"
Double quotes.
Swift
cin >> b;
int b; cin >> b;
Declare variable.
C++
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
name: hello age: 10
name: hello age: 10
Correct.
YAML
int num = 'output';
String num = 'output';
Type mismatch.
Dart
<br></br>
<br>
Self-closing.
HTML
const b;
const b = 60;
Initialize const.
JavaScript
<person><name>info</name><age>43</age></person
<person><name>info</name><age>43</age></person>
Add closing >.
XML
status: output status: data,
status: output status: data
Remove comma.
YAML
<center>test</center>
<div style='text-align:center;'>test</div>
Use CSS.
HTML
if (temp) console.log('yes') else console.log('no')
if (temp) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
for data in range(73) print(data)
for data in range(73): print(data)
Colon after for.
Python
disp('value')
disp('value')
Correct.
MATLAB
String result = 'result';
String result = "result";
Double quotes.
Java
const http = require('http'); http.createServer((req,res) => res.end('output')).listen(74);
const http = require('http'); http.createServer((req,res) => res.end('output')).listen(74);
Correct.
Node.js
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
<p>info <b>hello</p></b>
<p>info <b>hello</b></p>
Nest properly.
HTML
{{"title":"value",}}
{{"title":"value"}}
Remove trailing comma.
JSON
if (result = 89)
if (result == 89)
Use ==.
C++
var x int
var x int
Correct.
Go
let result: i32 = "value";
let result: &str = "value";
Type mismatch.
Rust
val count = 87; count = 11
var count = 87; count = 11
Use var for reassignment.
Scala
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
let a = 6; a += 1;
let mut a = 6; a += 1;
Need mut to modify.
Rust
var b int = 'world'
var b string = 'world'
Type mismatch.
Go
SELECT * FROM users WHRE status=35;
SELECT * FROM users WHERE status=35;
Fix WHERE.
SQL
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
<div color=red>
<div style='color:red;'>
Use style attribute.
CSS
<input type='text' value='info'>
<input type='text' value='info' name='age'>
Add name attribute.
HTML
z > 69 & b < 31
z > 69 and b < 31
Use 'and' not '&'.
Python
h1 {{ font-size:94px color:blue; }}
h1 {{ font-size:94px; color:blue; }}
Add semicolon.
CSS
// comment
/* comment */
Use /* */.
CSS
my @arr = (91,35,48);
my @arr = (91,35,48);
Correct.
Perl
#main {{ color: red; }}
#main {{ color: red; }}
Correct.
CSS
assert c > 21
assert c > 21
Correct.
Python
[x*x for x in data if x > 90]
[x*x for x in data if x > 90]
Correct list comprehension.
Python
<hr></hr>
<hr>
Self-closing.
HTML
function process(z:string){{return z;}} process(22);
function process(z:string){{return z;}} process('hello');
Pass correct type.
TypeScript
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
list[58]
if (length(list) >= 58) list[58]
Check length.
R
for (x in data)
for (x of data)
for...in iterates keys.
JavaScript
INSERT INTO products VALUES ('world',17)
INSERT INTO products (name, email) VALUES ('world',17);
Specify columns.
SQL
$result = 25; if ($result = 25) {{}}
$result = 25; if ($result == 25) {{}}
Use ==.
PHP
console.log('result'
console.log('result')
Close parenthesis.
JavaScript
<div><p>test</div></p>
<div><p>test</p></div>
Nest properly.
HTML
let list=vec![52,27,46]; let head=&list[0]; list.push(4);
let mut list=vec![52,27,46]; let head=list[0]; list.push(4);
Copy instead of reference.
Rust
DELETE FROM orders WHERE email=21
DELETE FROM orders WHERE email=21;
Add semicolon.
SQL
val num: Int = 'hello'
val num: String = 'hello'
Fix type.
Kotlin
for i=1,57 do print(i) end
for i=1,57 do print(i) end
Correct.
Lua
$list[80] = 5;
if (isset($list[80])) $list[80] = 5;
Check existence.
PHP
24x = 10
x24 = 10
Variable cannot start with digit.
Python
match result {{ 1 => {{}} }}
match result {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
var x = 99;
var x = 99;
Correct.
Dart
div {{ color=#fff; }}
div {{ color: #fff; }}
Use colon.
CSS
index = output
index = 'output'
Quote strings.
Python
object Item {{ def main(args: Array[String]) = println("result") }}
object Item {{ def main(args: Array[String]): Unit = println("result") }}
Add return type Unit.
Scala
int[] items = new int[40]; items[40] = 5;
int[] items = new int[40]; if (40 < items.length) items[40] = 5;
Check bounds.
Java
class = 'data'
class_name = 'data'
'class' is a keyword.
Python
values(65)
if length(values) >= 65, values(65), end
Check length.
MATLAB