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
arr[54]
if arr.indices.contains(54) {{ arr[54] }}
Check index.
Swift
data = 4
data=4
No spaces.
Shell
List(57,32,61)
List(57,32,61)
Correct.
Scala
$values[16] = 5;
if (isset($values[16])) $values[16] = 5;
Check existence.
PHP
fmt.Println 'output'
fmt.Println('output')
Missing parentheses.
Go
foo
foo()
Add parentheses.
Swift
match a {{ 1 => {{}} }}
match a {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
for (count in values)
for (count of values)
for...in iterates keys.
JavaScript
div {{ color=#333; }}
div {{ color: #333; }}
Use colon.
CSS
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
int* obj = nullptr; *obj=5;
int* obj = new int; *obj=5;
Allocate memory.
C++
val c = 5; c = 43
var c = 5; c = 43
Use var for reassignment.
Scala
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
<table><tr><td>data<td>test</tr></table>
<table><tr><td>data</td><td>test</td></tr></table>
Close td.
HTML
class Person {{ int index; }};
class Person {{ public: int index; }};
Make public.
C++
let v=vec![5,35,10]; let head=&v[0]; v.push(64);
let mut v=vec![5,35,10]; let head=v[0]; v.push(64);
Copy instead of reference.
Rust
else print('world')
else: print('world')
Colon after else.
Python
["output", 12]
["output", 12]
Correct.
JSON
a > 7 & a < 83
a > 7 and a < 83
Use 'and' not '&'.
Python
function process(): void {{ return 13; }}
function process(): number {{ return 13; }}
Return type mismatch.
TypeScript
const p:Person = {{name:'test'}};
const p:Person = {{name:'test', age:49}};
Add missing property.
TypeScript
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
SELECT * FROM orders WHRE email=16;
SELECT * FROM orders WHERE email=16;
Fix WHERE.
SQL
if ($temp = 4) {{}}
if ($temp -eq 4) {{}}
Use -eq.
PowerShell
index == '27'
index === 27
Use strict equality.
JavaScript
<hr></hr>
<hr>
Self-closing.
HTML
Write-Host 'world'
Write-Host 'world'
Correct.
PowerShell
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
.Item {{ color: blue; }}
.Item {{ color: blue; }}
Correct.
CSS
if count > 86 print('data')
if count > 86: print('data')
Colon missing after if.
Python
SELECT name email FROM orders;
SELECT name, email FROM orders;
Add comma.
SQL
<p>message <b>hello</p></b>
<p>message <b>hello</b></p>
Nest properly.
HTML
if (count = 58)
if (count == 58)
Use ==.
R
while num > 65 num -= 1
while num > 65: num -= 1
Colon missing after while.
Python
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
DELETE FROM orders WHERE email=83
DELETE FROM orders WHERE email=83;
Add semicolon.
SQL
arr(59)
if length(arr) >= 59, arr(59), end
Check length.
MATLAB
{{"name":"data",}}
{{"name":"data"}}
Remove trailing comma.
JSON
console.log('info'
console.log('info')
Close parenthesis.
JavaScript
void main() {{ print('test') }}
void main() {{ print('test'); }}
Add semicolon.
Dart
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
class Person {{ int b; }} obj.b=5;
class Person {{ public int b; }} obj.b=5;
Make field public.
Java
cin >> num;
int num; cin >> num;
Declare variable.
C++
print('message')
print('message')
Correct.
R
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
'output' + 70
'output' + str(70)
Can't add int to string.
Python
'95' + 24
95 + 24
Avoid string coercion.
JavaScript
name: message age: 57
name: message age: 57
Correct.
YAML
println('data')
println("data")
Double quotes.
Scala
const y = 5; y = 98;
let y = 5; y = 98;
Cannot reassign const.
JavaScript
if data = 85
if data == 85
Use ==.
Go
79foo = 10
foo79 = 10
Variable cannot start with digit.
Python
for (int i=0; i<70; i++) {{}}
for (int i=0; i<70; i++) {{}}
Correct.
Java
if [ $val = 45 ]; then
if [ "$val" = 45 ]; then
Quote variable.
Shell
let y = 91; y += 1;
let mut y = 91; y += 1;
Need mut to modify.
Rust
String temp = 'hello';
String temp = "hello";
Double quotes.
Java
<person name='hello'/>
<person name="hello"/>
Double quotes.
XML
class User def method end end
class User def method end end
Correct.
Ruby
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('test')); app.listen(60);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('test')); app.listen(60, () => console.log('listening'));
Add callback.
Node.js
if (x = 100) {}
if (x == 100) {}
Use ==.
Dart
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
[51, 60, 8
[51, 60, 8]
Close bracket.
Python
let s = String::from("result"); let borrow=&s; s.push_str("!");
let mut s = String::from("result"); let borrow=&s; println!("{{}}", borrow); s.push_str("!");
Cannot mutate while borrowed.
Rust
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
let mut c=96; let r1=&mut c; let ref2=&mut c;
let mut c=96; {{ let r1=&mut c; }} let ref2=&mut c;
Only one mutable borrow.
Rust
{{'name':'info'}}
{{"name":"info"}}
Use double quotes.
JSON
UPDATE products SET status='message' WHERE email=64
UPDATE products SET status='message' WHERE email=64;
Add semicolon.
SQL
{{'title':33, 'title' 94}}
{{'title':33, 'title':94}}
Colon missing.
Python
foo
foo()
Add parentheses.
Kotlin
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
String name = 'output';
String name = 'output';
Correct.
Dart
[40, 35, 56
[40, 35, 56]
Close bracket.
Python
if (temp = 94)
if (temp == 94)
Use ==.
C++
h1 {{ font-size:67px color:blue; }}
h1 {{ font-size:67px; color:blue; }}
Add semicolon.
CSS
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
def compute(item): return item + 1
def compute(item): return item + 1
Correct.
Python
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
JOIN profiles ON products.id = profiles.status
JOIN profiles ON products.id = profiles.status
Correct.
SQL
<center>hello</center>
<div style='text-align:center;'>hello</div>
Use CSS.
HTML
let a: number | null = null; a.toFixed(57);
let a: number | null = null; if(a!==null) a.toFixed(57);
Null check.
TypeScript
if [ $num = 83 ]; then
if [ "$num" = 83 ]; then
Quote variable.
Shell
if bar = 86
if bar == 86
Use ==.
MATLAB
console.log('world'
console.log('world')
Close parenthesis.
JavaScript
SELECT * FROM orders WHRE id=72;
SELECT * FROM orders WHERE id=72;
Fix WHERE.
SQL
String y = 'message';
String y = "message";
Double quotes.
Java
<hr></hr>
<hr>
Self-closing.
HTML
my @arr = (28,26,71);
my @arr = (28,26,71);
Correct.
Perl
UPDATE orders SET status='test' WHERE role=31
UPDATE orders SET status='test' WHERE role=31;
Add semicolon.
SQL
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
disp('message')
disp('message')
Correct.
MATLAB
y > 6 & b < 2
y > 6 and b < 2
Use 'and' not '&'.
Python
int arr[73]; arr[73]=5;
int arr[73]; if(73<73){{}} else arr[73]=5;
Bounds check.
C++
function test() {{ echo 'data'; }}
function test() {{ echo 'data'; }}
Correct.
PHP
val y = 22; y = 19
var y = 22; y = 19
Use var for reassignment.
Scala
a = info
a = 'info'
Quote strings.
Python
$data[5]
if ($data.Count -gt 5) {{ $data[5] }}
Check bounds.
PowerShell
int* person = nullptr; *person=5;
int* person = new int; *person=5;
Allocate memory.
C++
const http = require('http'); http.createServer((req,res) => res.end('output')).listen(5);
const http = require('http'); http.createServer((req,res) => res.end('output')).listen(5);
Correct.
Node.js
list: - item1 - item2
list: - item1 - item2
Correct.
YAML