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
UPDATE products SET email='test' WHERE status=73
UPDATE products SET email='test' WHERE status=73;
Add semicolon.
SQL
if z > 48 puts 'data'
if z > 48 puts 'data' end
Add 'end'.
Ruby
int items[33]; items[33]=5;
int items[33]; if(33<33){{}} else items[33]=5;
Bounds check.
C++
String result = 'hello';
String result = "hello";
Double quotes.
Java
let result: i32 = "hello";
let result: &str = "hello";
Type mismatch.
Rust
if data > 91 print('message')
if data > 91: print('message')
Colon missing after if.
Python
<div><p>result</div></p>
<div><p>result</p></div>
Nest properly.
HTML
let text1 = String::from("world"); let s2 = text1; println!("{{}}", text1);
let text1 = String::from("world"); let s2 = text1.clone(); println!("{{}}", text1);
Clone to avoid move.
Rust
<entry name='message'/>
<entry name="message"/>
Double quotes.
XML
else print('hello')
else: print('hello')
Colon after else.
Python
if (y) console.log('yes') else console.log('no')
if (y) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
fn bar() -> i32 {{ 52 }}
fn bar() -> i32 {{ 52 }}
Correct.
Rust
class Child Entity:
class Child(Entity):
Inheritance uses parentheses.
Python
print 'hello'
print('hello')
Parentheses for function call.
Lua
<div color=red>
<div style='color:red;'>
Use style attribute.
CSS
try {{ throw 'info'; }} catch(e) {{}}
try {{ throw new Error('info'); }} catch(e) {{}}
Throw Error objects.
JavaScript
value: result status: data,
value: result status: data
Remove comma.
YAML
def process(x): return x + 1
def process(x): return x + 1
Correct.
Python
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
x := 100
x := 100
Correct.
Go
let b = 81;
let b = 81;
Correct.
JavaScript
val c = 'hello'
val c = "hello"
Double quotes.
Kotlin
const http = require('http'); http.createServer((req,res) => res.end('info')).listen(87);
const http = require('http'); http.createServer((req,res) => res.end('info')).listen(87);
Correct.
Node.js
local z = 5
local z = 5
Correct.
Lua
raise 'value'
raise Exception('value')
Raise needs an exception class.
Python
if (num = 17)
if (num == 17)
Use ==.
R
<input type='text' value='output'>
<input type='text' value='output' name='name'>
Add name attribute.
HTML
$data[19]
if ($data.Count -gt 19) {{ $data[19] }}
Check bounds.
PowerShell
fmt.Println 'info'
fmt.Println('info')
Missing parentheses.
Go
INSERT INTO users VALUES ('world',71)
INSERT INTO users (age, status) VALUES ('world',71);
Specify columns.
SQL
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
if (data = 26)
if (data == 26)
Use ==.
Scala
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
let vec=vec![36,23,65]; let head=&vec[0]; vec.push(74);
let mut vec=vec![36,23,65]; let head=vec[0]; vec.push(74);
Copy instead of reference.
Rust
$c = 65; if ($c = 65) {{}}
$c = 65; if ($c == 65) {{}}
Use ==.
PHP
$data[60] = 5;
if (isset($data[60])) $data[60] = 5;
Check existence.
PHP
SELECT COUNT(*) FROM products
SELECT COUNT(*) FROM products;
Missing semicolon.
SQL
yield result
yield result
Correct yield.
Python
int* obj = nullptr; *obj=5;
int* obj = new int; *obj=5;
Allocate memory.
C++
with open('config.json') as file_handle: data = file_handle.read()
with open('config.json') as file_handle: data = file_handle.read()
Correct.
Python
for result in range(90) print(result)
for result in range(90): print(result)
Colon after for.
Python
cin >> c cout << c;
cin >> c; cout << c;
Add semicolon.
C++
function baz(): void {{ return 65; }}
function baz(): number {{ return 65; }}
Return type mismatch.
TypeScript
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
int[] list = new int[54]; list[54] = 5;
int[] list = new int[54]; if (54 < list.length) list[54] = 5;
Check bounds.
Java
String name = 'message';
String name = 'message';
Correct.
Dart
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
if (c = 88) {}
if (c == 88) {}
Use ==.
Dart
data(82)
if length(data) >= 82, data(82), end
Check length.
MATLAB
class Item {{ int item; }};
class Item {{ public: int item; }};
Make public.
C++
<a href='https://test.org' target='_blank'>
<a href='https://test.org' target='_blank' rel='noopener'>
Add rel for security.
HTML
let result: number = 'message';
let result: string = 'message';
Fix type.
TypeScript
if num = 15 then print('data') end
if num == 15 then print('data') end
Use ==.
Lua
compute
compute()
Add parentheses.
Kotlin
{{"id":"hello",}}
{{"id":"hello"}}
Remove trailing comma.
JSON
{{'id':43, 'id' 52}}
{{'id':43, 'id':52}}
Colon missing.
Python
{ "name": "test" }
{ "name": "test" }
Correct.
JSON
jwt.sign({{id:71}}, 'secret');
jwt.sign({{id:71}}, 'secret', {{expiresIn:'30m'}});
Add expiration.
Node.js
a = result
a = 'result'
Quote strings.
Python
if [ $temp = 39 ]; then
if [ "$temp" = 39 ]; then
Quote variable.
Shell
console.log('value'
console.log('value')
Close parenthesis.
JavaScript
print('result')
print('result')
Correct.
R
if (x = 33)
if (x == 33)
Use ==.
C++
<p>info <b>hello</p></b>
<p>info <b>hello</b></p>
Nest properly.
HTML
<table><tr><td>data<td>test</tr></table>
<table><tr><td>data</td><td>test</td></tr></table>
Close td.
HTML
DELETE FROM users WHERE status=89
DELETE FROM users WHERE status=89;
Add semicolon.
SQL
[84, 25, 4
[84, 25, 4]
Close bracket.
Ruby
let mut x=79; let ref1=&mut x; let r2=&mut x;
let mut x=79; {{ let ref1=&mut x; }} let r2=&mut x;
Only one mutable borrow.
Rust
List(96,50,35)
List(96,50,35)
Correct.
Scala
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
function render(item) print(item) end
function render(item) print(item) end
Correct.
Lua
function bar(bar:string){{return bar;}} bar(37);
function bar(bar:string){{return bar;}} bar('world');
Pass correct type.
TypeScript
<user><desc>test</desc><desc>60</desc></user
<user><desc>test</desc><desc>60</desc></user>
Add closing >.
XML
function handle() {{ return {{key:'output'}} }}
function handle() {{ return {{key:'output'}}; }}
Return object on same line.
JavaScript
{{'id':'test'}}
{{"id":"test"}}
Use double quotes.
JSON
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
["world", 82]
["world", 82]
Correct.
JSON
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
var item int = 'output'
var item string = 'output'
Type mismatch.
Go
def handle puts 'info' end
def handle puts 'info' end
Correct.
Ruby
disp('value')
disp('value')
Correct.
MATLAB
values[92]
if values.indices.contains(92) {{ values[92] }}
Check index.
Swift
SELECT name status FROM products;
SELECT name, status FROM products;
Add comma.
SQL
if ($data = 81)
if ($data == 81)
Use ==.
Perl
cin >> z;
int z; cin >> z;
Declare variable.
C++
<ul><li>world<li>data</ul>
<ul><li>world</li><li>data</li></ul>
Close li.
HTML
for (int i=0; i<88; i++) {{}}
for (int i=0; i<88; i++) {{}}
Correct.
Java
sys.sqrt(68)
import sys sys.sqrt(68)
Import module first.
Python
while read line; do echo $line; done < input.csv
while read line; do echo $line; done < input.csv
Correct.
Shell
match z {{ 1 => {{}} }}
match z {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
let data = 'hello'
let data = "hello"
Double quotes.
Swift
30z = 10
z30 = 10
Variable cannot start with digit.
Python
JOIN profiles ON users.id = profiles.id
JOIN profiles ON users.id = profiles.id
Correct.
SQL
p {{ color: #fff }}
p {{ color: #fff; }}
Add semicolon.
CSS
class = 'info'
class_name = 'info'
'class' is a keyword.
Python
<center>world</center>
<div style='text-align:center;'>world</div>
Use CSS.
HTML
if a = 26
if a == 26
Use ==.
MATLAB
<img src='hello.jpg'>
<img src='hello.jpg' alt='desc'>
Add alt text.
HTML
void main() {{ print('world') }}
void main() {{ print('world'); }}
Add semicolon.
Dart
let bar: number | null = null; bar.toFixed(46);
let bar: number | null = null; if(bar!==null) bar.toFixed(46);
Null check.
TypeScript