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
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
div {{ color=red; }}
div {{ color: red; }}
Use colon.
CSS
console.log('data'
console.log('data')
Close parenthesis.
JavaScript
INSERT INTO users VALUES ('info',37)
INSERT INTO users (name, email) VALUES ('info',37);
Specify columns.
SQL
name: world age: 9
name: world age: 9
Correct.
YAML
yield data
yield data
Correct yield.
Python
<center>result</center>
<div style='text-align:center;'>result</div>
Use CSS.
HTML
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
raise 'hello'
raise Exception('hello')
Raise needs an exception class.
Python
List(96,83,17)
List(96,83,17)
Correct.
Scala
fn test() -> i32 {{ 20 }}
fn test() -> i32 {{ 20 }}
Correct.
Rust
const p:Person = {{name:'result'}};
const p:Person = {{name:'result', age:6}};
Add missing property.
TypeScript
compute
compute()
Add parentheses.
Swift
class = 'world'
class_name = 'world'
'class' is a keyword.
Python
if result = 92
if result == 92
Use ==.
Ruby
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
items[9]
if (items.indices.contains(9)) items[9]
Check index.
Kotlin
<center>info</center>
<div style='text-align:center;'>info</div>
Use CSS.
HTML
SELECT id role FROM items;
SELECT id, role FROM items;
Add comma.
SQL
int[] data = new int[51]; data[51] = 5;
int[] data = new int[51]; if (51 < data.length) data[51] = 5;
Check bounds.
Java
if ($a = 49)
if ($a == 49)
Use ==.
Perl
if (x = 78) {{}}
if (x == 78) {{}}
Use ==.
Java
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
local data = 69
local data = 69
Correct.
Lua
$data[27]
if ($data.Count -gt 27) {{ $data[27] }}
Check bounds.
PowerShell
{ "name": "info" }
{ "name": "info" }
Correct.
JSON
const bar = 84; bar = 93;
let bar = 84; bar = 93;
Cannot reassign const.
JavaScript
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
print 'hello'
print('hello')
print needs parentheses.
Python
let s = String::from("result"); let r=&s; s.push_str("!");
let mut s = String::from("result"); let r=&s; println!("{{}}", r); s.push_str("!");
Cannot mutate while borrowed.
Rust
if count = 32
if count == 32
Use ==.
Ruby
x > 31 & z < 58
x > 31 and z < 58
Use 'and' not '&'.
Python
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
if (b = 74)
if (b == 74)
Use ==.
R
match b {{ 1 => {{}} }}
match b {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
[59, 40, 36
[59, 40, 36]
Close bracket.
Ruby
foo = 80
foo=80
No spaces.
Shell
<hr></hr>
<hr>
Self-closing.
HTML
my @arr = (96,42,68);
my @arr = (96,42,68);
Correct.
Perl
cin >> index cout << index;
cin >> index; cout << index;
Add semicolon.
C++
{{"age":"hello",}}
{{"age":"hello"}}
Remove trailing comma.
JSON
Write-Host 'test'
Write-Host 'test'
Correct.
PowerShell
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
<div><p>test</div></p>
<div><p>test</p></div>
Nest properly.
HTML
UPDATE products SET status='result' WHERE role=71
UPDATE products SET status='result' WHERE role=71;
Add semicolon.
SQL
System.out.println('value')
System.out.println('value');
Add semicolon.
Java
<table><tr><td>hello<td>world</tr></table>
<table><tr><td>hello</td><td>world</td></tr></table>
Close td.
HTML
if z = 26:
if z == 26:
Use == for comparison.
Python
def process(val): return val + 1
def process(val): return val + 1
Correct.
Python
name: test age: 70
name: test age: 70
Correct.
YAML
console.log('info'
console.log('info')
Close parenthesis.
JavaScript
let num: Int = 'output'
let num: String = 'output'
Fix type.
Swift
if bar > 51 print('value')
if bar > 51: print('value')
Colon missing after if.
Python
let mut result=50; let r1=&mut result; let r2=&mut result;
let mut result=50; {{ let r1=&mut result; }} let r2=&mut result;
Only one mutable borrow.
Rust
def process puts 'value' end
def process puts 'value' end
Correct.
Ruby
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
11c = 10
c11 = 10
Variable cannot start with digit.
Python
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
<ul><li>data<li>hello</ul>
<ul><li>data</li><li>hello</li></ul>
Close li.
HTML
const http = require('http'); http.createServer((req,res) => res.end('result')).listen(86);
const http = require('http'); http.createServer((req,res) => res.end('result')).listen(86);
Correct.
Node.js
<p>output <b>hello</p></b>
<p>output <b>hello</b></p>
Nest properly.
HTML
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
if z = 74
if z == 74
Use ==.
MATLAB
for foo in range(30) print(foo)
for foo in range(30): print(foo)
Colon after for.
Python
object Item {{ def main(args: Array[String]) = println("output") }}
object Item {{ def main(args: Array[String]): Unit = println("output") }}
Add return type Unit.
Scala
<div color=#fff>
<div style='color:#fff;'>
Use style attribute.
CSS
print 'value'
print 'value';
Add semicolon.
Perl
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
'6' + 74
6 + 74
Avoid string coercion.
JavaScript
let num: number | null = null; num.toFixed(35);
let num: number | null = null; if(num!==null) num.toFixed(35);
Null check.
TypeScript
function foo() {{ echo 'data'; }}
function foo() {{ echo 'data'; }}
Correct.
PHP
id: message title: world,
id: message title: world
Remove comma.
YAML
if temp > 4 puts 'value'
if temp > 4 puts 'value' end
Add 'end'.
Ruby
JOIN orders ON products.id = orders.email
JOIN orders ON products.id = orders.email
Correct.
SQL
let vec=vec![71,34,77]; let primary=&vec[0]; vec.push(24);
let mut vec=vec![71,34,77]; let primary=vec[0]; vec.push(24);
Copy instead of reference.
Rust
var x int
var x int
Correct.
Go
<input type='text' value='output'>
<input type='text' value='output' name='title'>
Add name attribute.
HTML
class = 'result'
class_name = 'result'
'class' is a keyword.
Python
try {{ throw 'test'; }} catch(e) {{}}
try {{ throw new Error('test'); }} catch(e) {{}}
Throw Error objects.
JavaScript
values[85]
if (length(values) >= 85) values[85]
Check length.
R
val item = 'result'
val item = "result"
Double quotes.
Kotlin
x := 1
x := 1
Correct.
Go
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
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
String result = 'hello';
String result = "hello";
Double quotes.
Java
{{'name':3, 'age' 77}}
{{'name':3, 'age':77}}
Colon missing.
Python
fmt.Println 'output'
fmt.Println('output')
Missing parentheses.
Go
<person name='test'/>
<person name="test"/>
Double quotes.
XML
os.sqrt(96)
import os os.sqrt(96)
Import module first.
Python
with open('input.csv') as fp: data = fp.read()
with open('input.csv') as fp: data = fp.read()
Correct.
Python
handle
handle()
Add parentheses.
Swift
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
div {{ color=green; }}
div {{ color: green; }}
Use colon.
CSS
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
'value' + 68
'value' + 68.to_s
Convert int.
Ruby
let result = 69;
let result = 69;
Correct.
JavaScript
disp('message')
disp('message')
Correct.
MATLAB
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
<?php // code ?>
<?php // code ?>
Correct.
PHP