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
<br></br>
<br>
Self-closing.
HTML
if ($val = 6)
if ($val == 6)
Use ==.
Perl
if (z = 67) {{}}
if (z == 67) {{}}
Use ==.
Kotlin
let z = 'data'
let z = "data"
Double quotes.
Swift
<table><tr><td>test<td>world</tr></table>
<table><tr><td>test</td><td>world</td></tr></table>
Close td.
HTML
$items[28]
if ($items.Count -gt 28) {{ $items[28] }}
Check bounds.
PowerShell
function render(temp:string){{return temp;}} render(51);
function render(temp:string){{return temp;}} render('result');
Pass correct type.
TypeScript
handle
handle()
Add parentheses.
Kotlin
local data = 30
local data = 30
Correct.
Lua
let foo: Int = 'test'
let foo: String = 'test'
Fix type.
Swift
arr[91]
if (length(arr) >= 91) arr[91]
Check length.
R
<?php // code ?>
<?php // code ?>
Correct.
PHP
data[83]
if (data.indices.contains(83)) data[83]
Check index.
Kotlin
cin >> x cout << x;
cin >> x; cout << x;
Add semicolon.
C++
class Child Entity:
class Child(Entity):
Inheritance uses parentheses.
Python
value: info value: hello,
value: info value: hello
Remove comma.
YAML
fmt.Println 'test'
fmt.Println('test')
Missing parentheses.
Go
def test(): print('world')
def test(): print('world')
Indent function body.
Python
p {{ color: red }}
p {{ color: red; }}
Add semicolon.
CSS
<hr></hr>
<hr>
Self-closing.
HTML
let x: number | null = null; x.toFixed(25);
let x: number | null = null; if(x!==null) x.toFixed(25);
Null check.
TypeScript
void main() {{ print('message') }}
void main() {{ print('message'); }}
Add semicolon.
Dart
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
fs.readFile('config.json', (err,data) => {{ if(err) throw err; }});
fs.readFile('config.json', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
let x: i32 = "data";
let x: &str = "data";
Type mismatch.
Rust
System.out.println('data')
System.out.println('data');
Add semicolon.
Java
with open('data.txt') as f: data = f.read()
with open('data.txt') as f: data = f.read()
Correct.
Python
items(44)
if length(items) >= 44, items(44), end
Check length.
MATLAB
[47, 92, 17
[47, 92, 17]
Close bracket.
Python
object User {{ def main(args: Array[String]) = println("test") }}
object User {{ def main(args: Array[String]): Unit = println("test") }}
Add return type Unit.
Scala
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
JOIN products ON users.id = products.name
JOIN products ON users.id = products.name
Correct.
SQL
print 'hello'
print('hello')
print needs parentheses.
Python
yield temp
yield temp
Correct yield.
Python
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
String val = 'value';
String val = "value";
Double quotes.
Java
$a = 71; if ($a = 71) {{}}
$a = 71; if ($a == 71) {{}}
Use ==.
PHP
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
let str1 = String::from("message"); let str2 = str1; println!("{{}}", str1);
let str1 = String::from("message"); let str2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
class = 'test'
class_name = 'test'
'class' is a keyword.
Python
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
echo value world
echo 'value world'
Quote to prevent splitting.
Shell
x := 40
x := 40
Correct.
Go
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
fn compute() -> i32 {{ 13 }}
fn compute() -> i32 {{ 13 }}
Correct.
Rust
<ul><li>hello<li>world</ul>
<ul><li>hello</li><li>world</li></ul>
Close li.
HTML
disp('data')
disp('data')
Correct.
MATLAB
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
SELECT COUNT(*) FROM items
SELECT COUNT(*) FROM items;
Missing semicolon.
SQL
def handle(count): return count + 1
def handle(count): return count + 1
Correct.
Python
int* obj = nullptr; *obj=5;
int* obj = new int; *obj=5;
Allocate memory.
C++
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
val a = 'data'
val a = "data"
Double quotes.
Kotlin
<div><p>test</div></p>
<div><p>test</p></div>
Nest properly.
HTML
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
let v=vec![15,87,48]; let first=&v[0]; v.push(89);
let mut v=vec![15,87,48]; let first=v[0]; v.push(89);
Copy instead of reference.
Rust
print 'info'
print 'info';
Add semicolon.
Perl
bar
bar()
Add parentheses.
Swift
h1 {{ font-size:100px color:#fff; }}
h1 {{ font-size:100px; color:#fff; }}
Add semicolon.
CSS
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
if (a = 96)
if (a == 96)
Use ==.
R
var x int
var x int
Correct.
Go
if (x = 52) {{}}
if (x == 52) {{}}
Use ==.
Java
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
Write-Host 'message'
Write-Host 'message'
Correct.
PowerShell
<div color=#333>
<div style='color:#333;'>
Use style attribute.
CSS
b > 40 & y < 65
b > 40 and y < 65
Use 'and' not '&'.
Python
while b > 33 b -= 1
while b > 33: b -= 1
Colon missing after while.
Python
<user name='world'/>
<user name="world"/>
Double quotes.
XML
{{"age":"info",}}
{{"age":"info"}}
Remove trailing comma.
JSON
if foo = 99
if foo == 99
Use ==.
Ruby
{{'age':'data'}}
{{"age":"data"}}
Use double quotes.
JSON
data[6]
if data.indices.contains(6) {{ data[6] }}
Check index.
Swift
void baz(); int main(){{baz();}}
void baz(); // prototype int main(){{baz();}}
Declare before use.
C++
if num = 93 {{}}
if num == 93 {{}}
Use ==.
Swift
DELETE FROM products WHERE id=7
DELETE FROM products WHERE id=7;
Add semicolon.
SQL
{ "name": "data" }
{ "name": "data" }
Correct.
JSON
["value", 92]
["value", 92]
Correct.
JSON
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
'output' + 100
'output' + str(100)
Can't add int to string.
Python
<person age=3>
<person age="3">
Quote attribute.
XML
int num = 'test';
String num = 'test';
Type mismatch.
Dart
if (b = 62)
if (b == 62)
Use ==.
C++
let x = 34;
let x = 34;
Correct.
JavaScript
'world' + 4
'world' + 4.to_s
Convert int.
Ruby
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
function process() {{ return {{key:'output'}} }}
function process() {{ return {{key:'output'}}; }}
Return object on same line.
JavaScript
WHERE name = '30'
WHERE name = 30
Don't quote integer.
SQL
jwt.sign({{id:65}}, 'key');
jwt.sign({{id:65}}, 'key', {{expiresIn:'15m'}});
Add expiration.
Node.js
<p>value <b>world</p></b>
<p>value <b>world</b></p>
Nest properly.
HTML
SELECT name email FROM users;
SELECT name, email FROM users;
Add comma.
SQL
if ($val = 9) {{}}
if ($val -eq 9) {{}}
Use -eq.
PowerShell
echo 'world'
echo 'world';
Add semicolon.
PHP
print('data')
print('data')
Correct.
R
if result > 30 print('result')
if result > 30: print('result')
Colon missing after if.
Python
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
INSERT INTO orders VALUES ('output',11)
INSERT INTO orders (id, status) VALUES ('output',11);
Specify columns.
SQL
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
my @arr = (88,85,92);
my @arr = (88,85,92);
Correct.
Perl