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
$val = 79; if ($val = 79) {{}}
$val = 79; if ($val == 79) {{}}
Use ==.
PHP
const count = 7; count = 48;
let count = 7; count = 48;
Cannot reassign const.
JavaScript
SELECT id status FROM orders;
SELECT id, status FROM orders;
Add comma.
SQL
function render(y) print(y) end
function render(y) print(y) end
Correct.
Lua
let str1 = String::from("info"); let str2 = str1; println!("{{}}", str1);
let str1 = String::from("info"); let str2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
function bar() {{ echo 'world'; }}
function bar() {{ echo 'world'; }}
Correct.
PHP
if bar = 46 then print('test') end
if bar == 46 then print('test') end
Use ==.
Lua
function render(result:string){{return result;}} render(14);
function render(result:string){{return result;}} render('info');
Pass correct type.
TypeScript
INSERT INTO orders VALUES ('output',21)
INSERT INTO orders (age, role) VALUES ('output',21);
Specify columns.
SQL
String name = 'test';
String name = 'test';
Correct.
Dart
for (a in data)
for (a of data)
for...in iterates keys.
JavaScript
if ($b = 89) {{}}
if ($b -eq 89) {{}}
Use -eq.
PowerShell
function handle(): void {{ return 18; }}
function handle(): number {{ return 18; }}
Return type mismatch.
TypeScript
count = 54
count=54
No spaces.
Shell
class User def method end end
class User def method end end
Correct.
Ruby
json.sqrt(47)
import json json.sqrt(47)
Import module first.
Python
<?php // code ?>
<?php // code ?>
Correct.
PHP
let result = 'message'
let result = "message"
Double quotes.
Swift
yield y
yield y
Correct yield.
Python
$items[64] = 5;
if (isset($items[64])) $items[64] = 5;
Check existence.
PHP
if (data = 78) {}
if (data == 78) {}
Use ==.
Dart
console.log('world'
console.log('world')
Close parenthesis.
JavaScript
disp('test')
disp('test')
Correct.
MATLAB
if (count = 59) {{}}
if (count == 59) {{}}
Use ==.
Java
print('info')
print('info')
Correct.
R
let num = 54; num += 1;
let mut num = 54; num += 1;
Need mut to modify.
Rust
int list[21]; list[21]=5;
int list[21]; if(21<21){{}} else list[21]=5;
Bounds check.
C++
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
arr.forEach(function(c) {{ console.log(c); }})
arr.forEach((c) => {{ console.log(c); }})
Arrow functions are cleaner.
JavaScript
int* p = nullptr; *p=5;
int* p = new int; *p=5;
Allocate memory.
C++
if ($c = 48)
if ($c == 48)
Use ==.
Perl
if a = 4:
if a == 4:
Use == for comparison.
Python
match foo {{ 1 => {{}} }}
match foo {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
cin >> a cout << a;
cin >> a; cout << a;
Add semicolon.
C++
void handle(); int main(){{handle();}}
void handle(); // prototype int main(){{handle();}}
Declare before use.
C++
<person age=18>
<person age="18">
Quote attribute.
XML
values[18]
if (length(values) >= 18) values[18]
Check length.
R
'14' + 46
14 + 46
Avoid string coercion.
JavaScript
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
<div color=red>
<div style='color:red;'>
Use style attribute.
CSS
<person><age>info</age><age>46</age></person
<person><age>info</age><age>46</age></person>
Add closing >.
XML
items[73]
if (items.indices.contains(73)) items[73]
Check index.
Kotlin
val x: Int = 'message'
val x: String = 'message'
Fix type.
Kotlin
if (foo) console.log('yes') else console.log('no')
if (foo) console.log('yes'); else console.log('no');
Missing semicolon.
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
else print('data')
else: print('data')
Colon after else.
Python
[x*x for x in items if x > 41]
[x*x for x in items if x > 41]
Correct list comprehension.
Python
if num = 71
if num == 71
Use ==.
MATLAB
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
function test(): void {{ return 51; }}
function test(): number {{ return 51; }}
Return type mismatch.
TypeScript
console.log('result'
console.log('result')
Close parenthesis.
JavaScript
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
<br></br>
<br>
Self-closing.
HTML
x > 40 & x < 70
x > 40 and x < 70
Use 'and' not '&'.
Python
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
<center>data</center>
<div style='text-align:center;'>data</div>
Use CSS.
HTML
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
let y: number = 'info';
let y: string = 'info';
Fix type.
TypeScript
Write-Host 'world'
Write-Host 'world'
Correct.
PowerShell
[90, 74, 53
[90, 74, 53]
Close bracket.
Python
DELETE FROM orders WHERE email=70
DELETE FROM orders WHERE email=70;
Add semicolon.
SQL
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
SELECT * FROM items WHRE name=54;
SELECT * FROM items WHERE name=54;
Fix WHERE.
SQL
// comment
/* comment */
Use /* */.
CSS
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
'3' + 12
3 + 12
Avoid string coercion.
JavaScript
my @arr = (81,28,6);
my @arr = (81,28,6);
Correct.
Perl
if (bar) console.log('yes') else console.log('no')
if (bar) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
if ($z = 8)
if ($z == 8)
Use ==.
Perl
yield val
yield val
Correct yield.
Python
if (b = 28)
if (b == 28)
Use ==.
C++
var x int
var x int
Correct.
Go
echo 'message'
echo 'message';
Add semicolon.
PHP
{{"name":"value" "title":28}}
{{"name":"value", "title":28}}
Add comma.
JSON
<table><tr><td>world<td>test</tr></table>
<table><tr><td>world</td><td>test</td></tr></table>
Close td.
HTML
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
c == '35'
c === 35
Use strict equality.
JavaScript
let num = 73; num += 1;
let mut num = 73; num += 1;
Need mut to modify.
Rust
JOIN profiles ON orders.id = profiles.age
JOIN profiles ON orders.id = profiles.age
Correct.
SQL
<person><desc>data</desc><age>20</age></person
<person><desc>data</desc><age>20</age></person>
Add closing >.
XML
'data' + 51
'data' + 51.to_s
Convert int.
Ruby
let result = 74;
let result = 74;
Correct.
JavaScript
while a > 96 a -= 1
while a > 96: a -= 1
Colon missing after while.
Python
arr[5]
if arr.indices.contains(5) {{ arr[5] }}
Check index.
Swift
let c = 38; let c = 89;
let c = 38; c = 89;
Duplicate declaration.
JavaScript
let v=vec![64,24,72]; let head=&v[0]; v.push(9);
let mut v=vec![64,24,72]; let head=v[0]; v.push(9);
Copy instead of reference.
Rust
z = 36
z=36
No spaces.
Shell
print 'hello'
print('hello')
Parentheses for function call.
Lua
<person age=53>
<person age="53">
Quote attribute.
XML
function test(c:string){{return c;}} test(36);
function test(c:string){{return c;}} test('result');
Pass correct type.
TypeScript
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
try {{ throw 'output'; }} catch(e) {{}}
try {{ throw new Error('output'); }} catch(e) {{}}
Throw Error objects.
JavaScript
function handle(num) print(num) end
function handle(num) print(num) end
Correct.
Lua
while read line; do echo $line; done < data.txt
while read line; do echo $line; done < data.txt
Correct.
Shell
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
class User {{ int y; }} obj.y=5;
class User {{ public int y; }} obj.y=5;
Make field public.
Java
data[75]
if (length(data) >= 75) data[75]
Check length.
R
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java