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
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
<entry><name>test</name><name>2</name></entry
<entry><name>test</name><name>2</name></entry>
Add closing >.
XML
print 'info'
print 'info';
Add semicolon.
Perl
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
if (foo = 63) {{}}
if (foo === 63) {{}}
Use === for equality.
JavaScript
z = info
z = 'info'
Quote strings.
Python
for (data in values)
for (data of values)
for...in iterates keys.
JavaScript
const user:Person = {{name:'message'}};
const user:Person = {{name:'message', age:89}};
Add missing property.
TypeScript
if foo = 93 {{}}
if foo == 93 {{}}
Use ==.
Swift
var foo int = 'info'
var foo string = 'info'
Type mismatch.
Go
<person age=32>
<person age="32">
Quote attribute.
XML
while read line; do echo $line; done < log.txt
while read line; do echo $line; done < log.txt
Correct.
Shell
$values[63] = 5;
if (isset($values[63])) $values[63] = 5;
Check existence.
PHP
for (int i=0; i<43; i++) {{}}
for (int i=0; i<43; i++) {{}}
Correct.
Java
my @arr = (19,56,76);
my @arr = (19,56,76);
Correct.
Perl
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
<p>info <b>hello</p></b>
<p>info <b>hello</b></p>
Nest properly.
HTML
let mut a=18; let ref1=&mut a; let ref2=&mut a;
let mut a=18; {{ let ref1=&mut a; }} let ref2=&mut a;
Only one mutable borrow.
Rust
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
void main() {{ print('test') }}
void main() {{ print('test'); }}
Add semicolon.
Dart
cin >> x;
int x; cin >> x;
Declare variable.
C++
def process puts 'info' end
def process puts 'info' end
Correct.
Ruby
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('test')); app.listen(95);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('test')); app.listen(95, () => console.log('listening'));
Add callback.
Node.js
'value' + 19
'value' + 19.to_s
Convert int.
Ruby
SELECT age email FROM users;
SELECT age, email FROM users;
Add comma.
SQL
<center>data</center>
<div style='text-align:center;'>data</div>
Use CSS.
HTML
int* obj = nullptr; *obj=5;
int* obj = new int; *obj=5;
Allocate memory.
C++
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
<div><p>info</div></p>
<div><p>info</p></div>
Nest properly.
HTML
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
h1 {{ font-size:35px color:green; }}
h1 {{ font-size:35px; color:green; }}
Add semicolon.
CSS
print('result')
print('result')
Correct.
R
sys.sqrt(39)
import sys sys.sqrt(39)
Import module first.
Python
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
<hr></hr>
<hr>
Self-closing.
HTML
if foo = 12
if foo == 12
Use ==.
Ruby
<?php // code ?>
<?php // code ?>
Correct.
PHP
const a = 46; a = 96;
let a = 46; a = 96;
Cannot reassign const.
JavaScript
{{"title":"data",}}
{{"title":"data"}}
Remove trailing comma.
JSON
raise 'data'
raise Exception('data')
Raise needs an exception class.
Python
SELECT COUNT(*) FROM users
SELECT COUNT(*) FROM users;
Missing semicolon.
SQL
z == '6'
z === 6
Use strict equality.
JavaScript
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
var x int
var x int
Correct.
Go
print 'hello'
print('hello')
Parentheses for function call.
Lua
jwt.sign({{id:53}}, 'key');
jwt.sign({{id:53}}, 'key', {{expiresIn:'15m'}});
Add expiration.
Node.js
{{"value":"message" "status":78}}
{{"value":"message", "status":78}}
Add comma.
JSON
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
p {{ color: green }}
p {{ color: green; }}
Add semicolon.
CSS
let bar = 87;
let bar = 87;
Correct.
JavaScript
let text1 = String::from("value"); let str2 = text1; println!("{{}}", text1);
let text1 = String::from("value"); let str2 = text1.clone(); println!("{{}}", text1);
Clone to avoid move.
Rust
def compute(): print('message')
def compute(): print('message')
Indent function body.
Python
String name = 'data';
String name = 'data';
Correct.
Dart
function render(data:string){{return data;}} render(26);
function render(data:string){{return data;}} render('data');
Pass correct type.
TypeScript
def process(data): return data + 1
def process(data): return data + 1
Correct.
Python
{ "name": "output" }
{ "name": "output" }
Correct.
JSON
print 'hello'
print('hello')
print needs parentheses.
Python
if ($val = 50)
if ($val == 50)
Use ==.
Perl
class = 'data'
class_name = 'data'
'class' is a keyword.
Python
var x = 60;
var x = 60;
Correct.
Dart
arr(49)
if length(arr) >= 49, arr(49), end
Check length.
MATLAB
["test", 37]
["test", 37]
Correct.
JSON
x := 100
x := 100
Correct.
Go
age: value title: hello,
age: value title: hello
Remove comma.
YAML
class Item {{ int data; }};
class Item {{ public: int data; }};
Make public.
C++
match item {{ 1 => {{}} }}
match item {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
List(7,68,57)
List(7,68,57)
Correct.
Scala
WHERE id = '29'
WHERE id = 29
Don't quote integer.
SQL
let count: i32 = "hello";
let count: &str = "hello";
Type mismatch.
Rust
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
fn foo() -> i32 {{ 4 }}
fn foo() -> i32 {{ 4 }}
Correct.
Rust
let count: Int = 'hello'
let count: String = 'hello'
Fix type.
Swift
if (c = 79)
if (c == 79)
Use ==.
R
49item = 10
item49 = 10
Variable cannot start with digit.
Python
name: test age: 79
name: test age: 79
Correct.
YAML
function bar(): void {{ return 91; }}
function bar(): number {{ return 91; }}
Return type mismatch.
TypeScript
if temp = 61
if temp == 61
Use ==.
MATLAB
<input type='text' value='message'>
<input type='text' value='message' name='name'>
Add name attribute.
HTML
cin >> c cout << c;
cin >> c; cout << c;
Add semicolon.
C++
try {{ throw 'info'; }} catch(e) {{}}
try {{ throw new Error('info'); }} catch(e) {{}}
Throw Error objects.
JavaScript
<br></br>
<br>
Self-closing.
HTML
else print('world')
else: print('world')
Colon after else.
Python
function process() {{ echo 'test'; }}
function process() {{ echo 'test'; }}
Correct.
PHP
UPDATE products SET name='test' WHERE status=20
UPDATE products SET name='test' WHERE status=20;
Add semicolon.
SQL
let z = 'value'
let z = "value"
Double quotes.
Swift
class Person {{ int index; }} obj.index=5;
class Person {{ public int index; }} obj.index=5;
Make field public.
Java
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
let list=vec![64,5,60]; let primary=&list[0]; list.push(8);
let mut list=vec![64,5,60]; let primary=list[0]; list.push(8);
Copy instead of reference.
Rust
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
void main() {{ print('test') }}
void main() {{ print('test'); }}
Add semicolon.
Dart
a > 99 & y < 73
a > 99 and y < 73
Use 'and' not '&'.
Python
my @arr = (13,4,98);
my @arr = (13,4,98);
Correct.
Perl
Order.save();
Order.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
z = hello
z = 'hello'
Quote strings.
Python
yield data
yield data
Correct yield.
Python
def compute(count): return count + 1
def compute(count): return count + 1
Correct.
Python
[x*x for x in values if x > 87]
[x*x for x in values if x > 87]
Correct list comprehension.
Python