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
<person age=52>
<person age="52">
Quote attribute.
XML
if (a = 13)
if (a == 13)
Use ==.
C++
<center>world</center>
<div style='text-align:center;'>world</div>
Use CSS.
HTML
if val = 72:
if val == 72:
Use == for comparison.
Python
if temp = 13
if temp == 13
Use ==.
Go
let bar: Int = 'hello'
let bar: String = 'hello'
Fix type.
Swift
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
INSERT INTO products VALUES ('message',83)
INSERT INTO products (name, email) VALUES ('message',83);
Specify columns.
SQL
print 'output'
print('output')
print needs parentheses.
Python
disp('value')
disp('value')
Correct.
MATLAB
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
let z: i32 = "message";
let z: &str = "message";
Type mismatch.
Rust
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
for i=1,13 do print(i) end
for i=1,13 do print(i) end
Correct.
Lua
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
with open('data.txt') as fh: data = fh.read()
with open('data.txt') as fh: data = fh.read()
Correct.
Python
{ "name": "info" }
{ "name": "info" }
Correct.
JSON
<div><p>output</div></p>
<div><p>output</p></div>
Nest properly.
HTML
if (c) console.log('yes') else console.log('no')
if (c) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
function handle() {{ echo 'result'; }}
function handle() {{ echo 'result'; }}
Correct.
PHP
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
div {{ color=red; }}
div {{ color: red; }}
Use colon.
CSS
class = 'hello'
class_name = 'hello'
'class' is a keyword.
Python
cin >> z;
int z; cin >> z;
Declare variable.
C++
System.out.println('world')
System.out.println('world');
Add semicolon.
Java
val bar: Int = 'value'
val bar: String = 'value'
Fix type.
Kotlin
if index = 97
if index == 97
Use ==.
MATLAB
try {{ throw 'value'; }} catch(e) {{}}
try {{ throw new Error('value'); }} catch(e) {{}}
Throw Error objects.
JavaScript
<hr></hr>
<hr>
Self-closing.
HTML
raise 'info'
raise Exception('info')
Raise needs an exception class.
Python
while read line; do echo $line; done < data.txt
while read line; do echo $line; done < data.txt
Correct.
Shell
if b = 54 then print('value') end
if b == 54 then print('value') end
Use ==.
Lua
const data;
const data = 80;
Initialize const.
JavaScript
var x = 73;
var x = 73;
Correct.
Dart
UPDATE orders SET id='value' WHERE status=6
UPDATE orders SET id='value' WHERE status=6;
Add semicolon.
SQL
Post.save();
Post.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
let s = String::from("message"); let borrow=&s; s.push_str("!");
let mut s = String::from("message"); let borrow=&s; println!("{{}}", borrow); s.push_str("!");
Cannot mutate while borrowed.
Rust
{{'id':95, 'age' 4}}
{{'id':95, 'age':4}}
Colon missing.
Python
[21, 12, 86
[21, 12, 86]
Close bracket.
Ruby
<p>data <b>hello</p></b>
<p>data <b>hello</b></p>
Nest properly.
HTML
var index int = 'output'
var index string = 'output'
Type mismatch.
Go
<a href='https://demo.net' target='_blank'>
<a href='https://demo.net' target='_blank' rel='noopener'>
Add rel for security.
HTML
else print('value')
else: print('value')
Colon after else.
Python
my @arr = (16,31,11);
my @arr = (16,31,11);
Correct.
Perl
DELETE FROM products WHERE status=81
DELETE FROM products WHERE status=81;
Add semicolon.
SQL
def foo(): print('result')
def foo(): print('result')
Indent function body.
Python
<?php // code ?>
<?php // code ?>
Correct.
PHP
$foo = 1; if ($foo = 1) {{}}
$foo = 1; if ($foo == 1) {{}}
Use ==.
PHP
$values[86]
if ($values.Count -gt 86) {{ $values[86] }}
Check bounds.
PowerShell
let count = 'message'
let count = "message"
Double quotes.
Swift
[x*x for x in arr if x > 15]
[x*x for x in arr if x > 15]
Correct list comprehension.
Python
let foo = 76;
let foo = 76;
Correct.
JavaScript
print('result')
print('result')
Correct.
R
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
let foo = 68; foo += 1;
let mut foo = 68; foo += 1;
Need mut to modify.
Rust
handle
handle()
Add parentheses.
Swift
values[15]
if (length(values) >= 15) values[15]
Check length.
R
print 'world'
print 'world';
Add semicolon.
Perl
local c = 6
local c = 6
Correct.
Lua
while item > 4 item -= 1
while item > 4: item -= 1
Colon missing after while.
Python
name: test age: 13
name: test age: 13
Correct.
YAML
String name = 'value';
String name = 'value';
Correct.
Dart
const z = 68; z = 38;
let z = 68; z = 38;
Cannot reassign const.
JavaScript
'hello' + 27
'hello' + str(27)
Can't add int to string.
Python
let index = 28; let index = 27;
let index = 28; index = 27;
Duplicate declaration.
JavaScript
let str1 = String::from("result"); let s2 = str1; println!("{{}}", str1);
let str1 = String::from("result"); let s2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
SELECT COUNT(*) FROM users
SELECT COUNT(*) FROM users;
Missing semicolon.
SQL
$data[100] = 5;
if (isset($data[100])) $data[100] = 5;
Check existence.
PHP
JOIN orders ON items.id = orders.age
JOIN orders ON items.id = orders.age
Correct.
SQL
if (bar = 78) {{}}
if (bar == 78) {{}}
Use ==.
Java
if (c = 94) {}
if (c == 94) {}
Use ==.
Dart
def baz puts 'output' end
def baz puts 'output' end
Correct.
Ruby
if (index = 86)
if (index == 86)
Use ==.
R
<user><age>world</age><name>83</name></user
<user><age>world</age><name>83</name></user>
Add closing >.
XML
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
status: value name: world,
status: value name: world
Remove comma.
YAML
#content {{ color: blue; }}
#content {{ color: blue; }}
Correct.
CSS
p {{ color: red }}
p {{ color: red; }}
Add semicolon.
CSS
function bar(): void {{ return 65; }}
function bar(): number {{ return 65; }}
Return type mismatch.
TypeScript
if num = 43 {{}}
if num == 43 {{}}
Use ==.
Swift
[61, 94, 16
[61, 94, 16]
Close bracket.
Python
WHERE name = '60'
WHERE name = 60
Don't quote integer.
SQL
list(26)
if length(list) >= 26, list(26), end
Check length.
MATLAB
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('test')); app.listen(30);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('test')); app.listen(30, () => console.log('listening'));
Add callback.
Node.js
b > 87 & b < 60
b > 87 and b < 60
Use 'and' not '&'.
Python
cin >> num cout << num;
cin >> num; cout << num;
Add semicolon.
C++
switch(data){{ case 59: break; }}
switch(data){{ case 59: break; default: break; }}
Add default case.
Java
let data: number | null = null; data.toFixed(67);
let data: number | null = null; if(data!==null) data.toFixed(67);
Null check.
TypeScript
console.log('output'
console.log('output')
Close parenthesis.
JavaScript
int[] data = new int[55]; data[55] = 5;
int[] data = new int[55]; if (55 < data.length) data[55] = 5;
Check bounds.
Java
if (y = 92) {{}}
if (y == 92) {{}}
Use ==.
Kotlin
let z: number = 'hello';
let z: string = 'hello';
Fix type.
TypeScript
SELECT * FROM orders WHRE id=33;
SELECT * FROM orders WHERE id=33;
Fix WHERE.
SQL
echo 'world'
echo 'world';
Add semicolon.
PHP
<ul><li>test<li>hello</ul>
<ul><li>test</li><li>hello</li></ul>
Close li.
HTML
void main() {{ print('world') }}
void main() {{ print('world'); }}
Add semicolon.
Dart
if (count = 95) {{}}
if (count === 95) {{}}
Use === for equality.
JavaScript
.Product {{ color: green; }}
.Product {{ color: green; }}
Correct.
CSS
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R