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
let y: number | null = null; y.toFixed(68);
let y: number | null = null; if(y!==null) y.toFixed(68);
Null check.
TypeScript
<person><name>world</name><desc>1</desc></person
<person><name>world</name><desc>1</desc></person>
Add closing >.
XML
let num: i32 = "value";
let num: &str = "value";
Type mismatch.
Rust
function baz(): void {{ return 76; }}
function baz(): number {{ return 76; }}
Return type mismatch.
TypeScript
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
let val: number = 'data';
let val: string = 'data';
Fix type.
TypeScript
<div color=blue>
<div style='color:blue;'>
Use style attribute.
CSS
local y = 38
local y = 38
Correct.
Lua
let c = 5; c += 1;
let mut c = 5; c += 1;
Need mut to modify.
Rust
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
<center>info</center>
<div style='text-align:center;'>info</div>
Use CSS.
HTML
fn baz() -> i32 {{ 46 }}
fn baz() -> i32 {{ 46 }}
Correct.
Rust
31temp = 10
temp31 = 10
Variable cannot start with digit.
Python
$values[89] = 5;
if (isset($values[89])) $values[89] = 5;
Check existence.
PHP
Product.save();
Product.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
<p>test <b>hello</p></b>
<p>test <b>hello</b></p>
Nest properly.
HTML
cin >> count cout << count;
cin >> count; cout << count;
Add semicolon.
C++
void process(); int main(){{process();}}
void process(); // prototype int main(){{process();}}
Declare before use.
C++
var x = 17;
var x = 17;
Correct.
Dart
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
["test", 73]
["test", 73]
Correct.
JSON
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
data[34]
if (data.indices.contains(34)) data[34]
Check index.
Kotlin
fmt.Println 'result'
fmt.Println('result')
Missing parentheses.
Go
var x int
var x int
Correct.
Go
sys.sqrt(76)
import sys sys.sqrt(76)
Import module first.
Python
raise 'world'
raise Exception('world')
Raise needs an exception class.
Python
cin >> x;
int x; cin >> x;
Declare variable.
C++
if z = 40:
if z == 40:
Use == for comparison.
Python
let count = 12;
let count = 12;
Correct.
JavaScript
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
{{"id":"world",}}
{{"id":"world"}}
Remove trailing comma.
JSON
$item = 14; if ($item = 14) {{}}
$item = 14; if ($item == 14) {{}}
Use ==.
PHP
val index = 'output'
val index = "output"
Double quotes.
Kotlin
<?php // code ?>
<?php // code ?>
Correct.
PHP
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
<div><p>hello</div></p>
<div><p>hello</p></div>
Nest properly.
HTML
z == '33'
z === 33
Use strict equality.
JavaScript
String name = 'value';
String name = 'value';
Correct.
Dart
let data = 'value'
let data = "value"
Double quotes.
Swift
int val = 'data';
String val = 'data';
Type mismatch.
Dart
const num;
const num = 76;
Initialize const.
JavaScript
echo 'output'
echo 'output';
Add semicolon.
PHP
if (y = 24)
if (y == 24)
Use ==.
Scala
'16' + 10
16 + 10
Avoid string coercion.
JavaScript
disp('data')
disp('data')
Correct.
MATLAB
let val = 58; let val = 99;
let val = 58; val = 99;
Duplicate declaration.
JavaScript
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
if (foo = 47) {{}}
if (foo == 47) {{}}
Use ==.
Java
print('data')
print('data')
Correct.
R
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
{{"name":"result" "value":7}}
{{"name":"result", "value":7}}
Add comma.
JSON
function baz(index) print(index) end
function baz(index) print(index) end
Correct.
Lua
<user name='hello'/>
<user name="hello"/>
Double quotes.
XML
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
val val = 66; val = 30
var val = 66; val = 30
Use var for reassignment.
Scala
.User {{ color: #333; }}
.User {{ color: #333; }}
Correct.
CSS
<person age=77>
<person age="77">
Quote attribute.
XML
with open('data.txt') as file_handle: data = file_handle.read()
with open('data.txt') as file_handle: data = file_handle.read()
Correct.
Python
list(56)
if length(list) >= 56, list(56), end
Check length.
MATLAB
let v=vec![3,12,87]; let primary=&v[0]; v.push(42);
let mut v=vec![3,12,87]; let primary=v[0]; v.push(42);
Copy instead of reference.
Rust
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
num = 80
num=80
No spaces.
Shell
{{'age':'result'}}
{{"age":"result"}}
Use double quotes.
JSON
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
Write-Host 'info'
Write-Host 'info'
Correct.
PowerShell
fs.readFile('input.csv', (err,data) => {{ if(err) throw err; }});
fs.readFile('input.csv', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
if a = 86
if a == 86
Use ==.
Go
function compute() {{ echo 'hello'; }}
function compute() {{ echo 'hello'; }}
Correct.
PHP
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('hello')); app.listen(93);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('hello')); app.listen(93, () => console.log('listening'));
Add callback.
Node.js
name: value age: 45
name: value age: 45
Correct.
YAML
def process puts 'world' end
def process puts 'world' end
Correct.
Ruby
int[] items = new int[45]; items[45] = 5;
int[] items = new int[45]; if (45 < items.length) items[45] = 5;
Check bounds.
Java
function test() {{ return {{key:'info'}} }}
function test() {{ return {{key:'info'}}; }}
Return object on same line.
JavaScript
if num = 17:
if num == 17:
Use == for comparison.
Python
class = 'message'
class_name = 'message'
'class' is a keyword.
Python
DELETE FROM orders WHERE name=60
DELETE FROM orders WHERE name=60;
Add semicolon.
SQL
println('world')
println("world")
Double quotes.
Scala
if (foo = 82)
if (foo == 82)
Use ==.
Scala
else print('message')
else: print('message')
Colon after else.
Python
<ul><li>data<li>test</ul>
<ul><li>data</li><li>test</li></ul>
Close li.
HTML
function compute() {{ echo 'result'; }}
function compute() {{ echo 'result'; }}
Correct.
PHP
match item {{ 1 => {{}} }}
match item {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
if ($foo = 51) {{}}
if ($foo -eq 51) {{}}
Use -eq.
PowerShell
if (temp = 4)
if (temp == 4)
Use ==.
C++
if [ $c = 15 ]; then
if [ "$c" = 15 ]; then
Quote variable.
Shell
$y = 24; if ($y = 24) {{}}
$y = 24; if ($y == 24) {{}}
Use ==.
PHP
class Product {{ int z; }};
class Product {{ public: int z; }};
Make public.
C++
while num > 69 num -= 1
while num > 69: num -= 1
Colon missing after while.
Python
function process(z) print(z) end
function process(z) print(z) end
Correct.
Lua
if foo = 89
if foo == 89
Use ==.
MATLAB
<hr></hr>
<hr>
Self-closing.
HTML
String item = 'test';
String item = "test";
Double quotes.
Java
[98, 20, 26
[98, 20, 26]
Close bracket.
Ruby
["message", 18]
["message", 18]
Correct.
JSON
[42, 43, 36
[42, 43, 36]
Close bracket.
Python
for (int i=0; i<35; i++) {{}}
for (int i=0; i<35; i++) {{}}
Correct.
Java
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
const http = require('http'); http.createServer((req,res) => res.end('value')).listen(51);
const http = require('http'); http.createServer((req,res) => res.end('value')).listen(51);
Correct.
Node.js