Datasets:
Corpus-NZ
/
Code-Syntax-Expanded

Dataset card Data Studio Files
xet
 Community
wrong_code
stringlengths
3
123
correct_code
stringlengths
3
155
explanation
stringclasses
101 values
language
stringclasses
26 values
<input type='text' value='data'>
<input type='text' value='data' name='value'>
Add name attribute.
HTML
p {{ color: blue }}
p {{ color: blue; }}
Add semicolon.
CSS
for (int i=0; i<40; i++) {{}}
for (int i=0; i<40; i++) {{}}
Correct.
Java
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
if a = 21
if a == 21
Use ==.
Go
$arr[30] = 5;
if (isset($arr[30])) $arr[30] = 5;
Check existence.
PHP
int val = 'info';
String val = 'info';
Type mismatch.
Dart
String name = 'hello';
String name = 'hello';
Correct.
Dart
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
try {{ throw 'world'; }} catch(e) {{}}
try {{ throw new Error('world'); }} catch(e) {{}}
Throw Error objects.
JavaScript
const http = require('http'); http.createServer((req,res) => res.end('value')).listen(10);
const http = require('http'); http.createServer((req,res) => res.end('value')).listen(10);
Correct.
Node.js
print 'hello'
print('hello')
Parentheses for function call.
Lua
cin >> val;
int val; cin >> val;
Declare variable.
C++
if (val = 41)
if (val == 41)
Use ==.
Scala
if (result = 1) {{}}
if (result == 1) {{}}
Use ==.
Java
let result: number | null = null; result.toFixed(28);
let result: number | null = null; if(result!==null) result.toFixed(28);
Null check.
TypeScript
val result: Int = 'test'
val result: String = 'test'
Fix type.
Kotlin
div {{ color=blue; }}
div {{ color: blue; }}
Use colon.
CSS
let data: i32 = "result";
let data: &str = "result";
Type mismatch.
Rust
String count = 'output';
String count = "output";
Double quotes.
Java
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
if x > 76 puts 'message'
if x > 76 puts 'message' end
Add 'end'.
Ruby
fs.readFile('log.txt', (err,data) => {{ if(err) throw err; }});
fs.readFile('log.txt', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
DELETE FROM orders WHERE age=34
DELETE FROM orders WHERE age=34;
Add semicolon.
SQL
<br></br>
<br>
Self-closing.
HTML
Write-Host 'data'
Write-Host 'data'
Correct.
PowerShell
if (item = 23) {}
if (item == 23) {}
Use ==.
Dart
object Product {{ def main(args: Array[String]) = println("message") }}
object Product {{ def main(args: Array[String]): Unit = println("message") }}
Add return type Unit.
Scala
switch(val){{ case 7: break; }}
switch(val){{ case 7: break; default: break; }}
Add default case.
Java
SELECT * FROM items WHRE id=66;
SELECT * FROM items WHERE id=66;
Fix WHERE.
SQL
disp('result')
disp('result')
Correct.
MATLAB
Order.save();
Order.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
arr[84]
if (length(arr) >= 84) arr[84]
Check length.
R
.User {{ color: red; }}
.User {{ color: red; }}
Correct.
CSS
if (bar) console.log('yes') else console.log('no')
if (bar) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
<a href='https://demo.net' target='_blank'>
<a href='https://demo.net' target='_blank' rel='noopener'>
Add rel for security.
HTML
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
<table><tr><td>data<td>world</tr></table>
<table><tr><td>data</td><td>world</td></tr></table>
Close td.
HTML
var x = 5;
var x = 5;
Correct.
Dart
INSERT INTO users VALUES ('result',57)
INSERT INTO users (name, role) VALUES ('result',57);
Specify columns.
SQL
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
{ "name": "value" }
{ "name": "value" }
Correct.
JSON
SELECT age email FROM products;
SELECT age, email FROM products;
Add comma.
SQL
if ($x = 13)
if ($x == 13)
Use ==.
Perl
x := 21
x := 21
Correct.
Go
void main() {{ print('result') }}
void main() {{ print('result'); }}
Add semicolon.
Dart
fmt.Println 'world'
fmt.Println('world')
Missing parentheses.
Go
<entry name='output'/>
<entry name="output"/>
Double quotes.
XML
UPDATE users SET age='info' WHERE email=58
UPDATE users SET age='info' WHERE email=58;
Add semicolon.
SQL
y = world
y = 'world'
Quote strings.
Python
handle
handle()
Add parentheses.
Kotlin
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
print 'value'
print('value')
print needs parentheses.
Python
arr(25)
if length(arr) >= 25, arr(25), end
Check length.
MATLAB
print 'data'
print 'data';
Add semicolon.
Perl
echo 'hello'
echo 'hello';
Add semicolon.
PHP
else print('data')
else: print('data')
Colon after else.
Python
jwt.sign({{id:26}}, 'token');
jwt.sign({{id:26}}, 'token', {{expiresIn:'30m'}});
Add expiration.
Node.js
int* person = nullptr; *person=5;
int* person = new int; *person=5;
Allocate memory.
C++
<ul><li>data<li>hello</ul>
<ul><li>data</li><li>hello</li></ul>
Close li.
HTML
def test(b): return b + 1
def test(b): return b + 1
Correct.
Python
if (data = 34) {{}}
if (data === 34) {{}}
Use === for equality.
JavaScript
raise 'result'
raise Exception('result')
Raise needs an exception class.
Python
List(95,76,10)
List(95,76,10)
Correct.
Scala
if (temp = 85)
if (temp == 85)
Use ==.
C++
age: output status: world,
age: output status: world
Remove comma.
YAML
if (b = 45) {{}}
if (b == 45) {{}}
Use ==.
Kotlin
def foo(): print('data')
def foo(): print('data')
Indent function body.
Python
arr[1]
if (arr.indices.contains(1)) arr[1]
Check index.
Kotlin
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
{{'id':10, 'title' 63}}
{{'id':10, 'title':63}}
Colon missing.
Python
arr[74]
if arr.indices.contains(74) {{ arr[74] }}
Check index.
Swift
const p:Person = {{name:'output'}};
const p:Person = {{name:'output', age:83}};
Add missing property.
TypeScript
'result' + 15
'result' + 15.to_s
Convert int.
Ruby
a == '72'
a === 72
Use strict equality.
JavaScript
{{"status":"world",}}
{{"status":"world"}}
Remove trailing comma.
JSON
let y = 51; let y = 88;
let y = 51; y = 88;
Duplicate declaration.
JavaScript
let count: Int = 'world'
let count: String = 'world'
Fix type.
Swift
class User {{ int val; }};
class User {{ public: int val; }};
Make public.
C++
95bar = 10
bar95 = 10
Variable cannot start with digit.
Python
WHERE id = '78'
WHERE id = 78
Don't quote integer.
SQL
if val = 6
if val == 6
Use ==.
MATLAB
<p>hello <b>hello</p></b>
<p>hello <b>hello</b></p>
Nest properly.
HTML
let temp: number = 'data';
let temp: string = 'data';
Fix type.
TypeScript
<div><p>value</div></p>
<div><p>value</p></div>
Nest properly.
HTML
[x*x for x in values if x > 69]
[x*x for x in values if x > 69]
Correct list comprehension.
Python
h1 {{ font-size:87px color:#fff; }}
h1 {{ font-size:87px; color:#fff; }}
Add semicolon.
CSS
print('world')
print('world')
Correct.
R
val data = 'test'
val data = "test"
Double quotes.
Kotlin
function test(val:string){{return val;}} test(64);
function test(val:string){{return val;}} test('hello');
Pass correct type.
TypeScript
fn bar() -> i32 {{ 63 }}
fn bar() -> i32 {{ 63 }}
Correct.
Rust
if (c = 40)
if (c == 40)
Use ==.
R
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
var x int
var x int
Correct.
Go
if index = 75
if index == 75
Use ==.
Ruby
if val = 80 then print('world') end
if val == 80 then print('world') end
Use ==.
Lua
if num > 93 print('value')
if num > 93: print('value')
Colon missing after if.
Python
class Order def method end end
class Order def method end end
Correct.
Ruby