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
val num = 'info'
val num = "info"
Double quotes.
Kotlin
while read line; do echo $line; done < config.json
while read line; do echo $line; done < config.json
Correct.
Shell
y = info
y = 'info'
Quote strings.
Python
with open('config.json') as file_handle: data = file_handle.read()
with open('config.json') as file_handle: data = file_handle.read()
Correct.
Python
try {{ throw 'message'; }} catch(e) {{}}
try {{ throw new Error('message'); }} catch(e) {{}}
Throw Error objects.
JavaScript
def handle(b): return b + 1
def handle(b): return b + 1
Correct.
Python
assert y > 73
assert y > 73
Correct.
Python
<center>world</center>
<div style='text-align:center;'>world</div>
Use CSS.
HTML
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
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
let foo = 'message'
let foo = "message"
Double quotes.
Swift
val == '15'
val === 15
Use strict equality.
JavaScript
$data[96] = 5;
if (isset($data[96])) $data[96] = 5;
Check existence.
PHP
void main() {{ print('test') }}
void main() {{ print('test'); }}
Add semicolon.
Dart
$data = 91; if ($data = 91) {{}}
$data = 91; if ($data == 91) {{}}
Use ==.
PHP
UPDATE users SET id='result' WHERE role=54
UPDATE users SET id='result' WHERE role=54;
Add semicolon.
SQL
function handle(val:string){{return val;}} handle(86);
function handle(val:string){{return val;}} handle('test');
Pass correct type.
TypeScript
'21' + 33
21 + 33
Avoid string coercion.
JavaScript
let x: Int = 'value'
let x: String = 'value'
Fix type.
Swift
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
my @arr = (53,33,5);
my @arr = (53,33,5);
Correct.
Perl
val x: Int = 'value'
val x: String = 'value'
Fix type.
Kotlin
<user name='info'/>
<user name="info"/>
Double quotes.
XML
name: value age: 47
name: value age: 47
Correct.
YAML
a > 100 & a < 84
a > 100 and a < 84
Use 'and' not '&'.
Python
cin >> foo;
int foo; cin >> foo;
Declare variable.
C++
data[69]
if data.indices.contains(69) {{ data[69] }}
Check index.
Swift
const person:Person = {{name:'test'}};
const person:Person = {{name:'test', age:10}};
Add missing property.
TypeScript
else print('hello')
else: print('hello')
Colon after else.
Python
int[] data = new int[17]; data[17] = 5;
int[] data = new int[17]; if (17 < data.length) data[17] = 5;
Check bounds.
Java
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
re.sqrt(95)
import re re.sqrt(95)
Import module first.
Python
var x = 91;
var x = 91;
Correct.
Dart
INSERT INTO items VALUES ('message',92)
INSERT INTO items (id, status) VALUES ('message',92);
Specify columns.
SQL
fmt.Println 'info'
fmt.Println('info')
Missing parentheses.
Go
#header {{ color: #fff; }}
#header {{ color: #fff; }}
Correct.
CSS
const val;
const val = 62;
Initialize const.
JavaScript
if data = 8
if data == 8
Use ==.
Ruby
$arr[94] = 5;
if (isset($arr[94])) $arr[94] = 5;
Check existence.
PHP
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
{{"value":"world" "status":91}}
{{"value":"world", "status":91}}
Add comma.
JSON
let item = 2; let item = 2;
let item = 2; item = 2;
Duplicate declaration.
JavaScript
while read line; do echo $line; done < input.csv
while read line; do echo $line; done < input.csv
Correct.
Shell
<person age=73>
<person age="73">
Quote attribute.
XML
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
WHERE age = '15'
WHERE age = 15
Don't quote integer.
SQL
<a href='https://demo.net' target='_blank'>
<a href='https://demo.net' target='_blank' rel='noopener'>
Add rel for security.
HTML
<input type='text' value='hello'>
<input type='text' value='hello' name='id'>
Add name attribute.
HTML
if ($data = 37)
if ($data == 37)
Use ==.
Perl
[x*x for x in items if x > 52]
[x*x for x in items if x > 52]
Correct list comprehension.
Python
UPDATE items SET id='value' WHERE email=8
UPDATE items SET id='value' WHERE email=8;
Add semicolon.
SQL
print('hello')
print('hello')
Correct.
R
function bar() {{ return {{key:'world'}} }}
function bar() {{ return {{key:'world'}}; }}
Return object on same line.
JavaScript
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
if ($a = 60) {{}}
if ($a -eq 60) {{}}
Use -eq.
PowerShell
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
age: hello name: hello,
age: hello name: hello
Remove comma.
YAML
if bar > 67 print('data')
if bar > 67: print('data')
Colon missing after if.
Python
<entry name='result'/>
<entry name="result"/>
Double quotes.
XML
while count > 28 count -= 1
while count > 28: count -= 1
Colon missing after while.
Python
<div><p>value</div></p>
<div><p>value</p></div>
Nest properly.
HTML
if (x) console.log('yes') else console.log('no')
if (x) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
JOIN profiles ON users.id = profiles.id
JOIN profiles ON users.id = profiles.id
Correct.
SQL
list(98)
if length(list) >= 98, list(98), end
Check length.
MATLAB
values[9]
if values.indices.contains(9) {{ values[9] }}
Check index.
Swift
<p>result <b>data</p></b>
<p>result <b>data</b></p>
Nest properly.
HTML
<div color=#333>
<div style='color:#333;'>
Use style attribute.
CSS
b > 87 & y < 11
b > 87 and y < 11
Use 'and' not '&'.
Python
function test() {{ echo 'result'; }}
function test() {{ echo 'result'; }}
Correct.
PHP
class = 'output'
class_name = 'output'
'class' is a keyword.
Python
["world", 96]
["world", 96]
Correct.
JSON
bar
bar()
Add parentheses.
Swift
let temp: i32 = "value";
let temp: &str = "value";
Type mismatch.
Rust
{{'age':'test'}}
{{"age":"test"}}
Use double quotes.
JSON
57data = 10
data57 = 10
Variable cannot start with digit.
Python
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('value')); app.listen(17);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('value')); app.listen(17, () => console.log('listening'));
Add callback.
Node.js
String z = 'output';
String z = "output";
Double quotes.
Java
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
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
println('hello')
println("hello")
Double quotes.
Scala
my @arr = (60,57,31);
my @arr = (60,57,31);
Correct.
Perl
let list=vec![52,99,32]; let primary=&list[0]; list.push(11);
let mut list=vec![52,99,32]; let primary=list[0]; list.push(11);
Copy instead of reference.
Rust
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
if result = 66 {{}}
if result == 66 {{}}
Use ==.
Swift
div {{ color=#333; }}
div {{ color: #333; }}
Use colon.
CSS
with open('input.csv') as fp: data = fp.read()
with open('input.csv') as fp: data = fp.read()
Correct.
Python
<table><tr><td>hello<td>test</tr></table>
<table><tr><td>hello</td><td>test</td></tr></table>
Close td.
HTML
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
SELECT * FROM orders WHRE name=6;
SELECT * FROM orders WHERE name=6;
Fix WHERE.
SQL
yield temp
yield temp
Correct yield.
Python
print 'message'
print 'message';
Add semicolon.
Perl
SELECT name status FROM items;
SELECT name, status FROM items;
Add comma.
SQL
def bar(): print('test')
def bar(): print('test')
Indent function body.
Python
if val = 67:
if val == 67:
Use == for comparison.
Python
arr[55]
if (arr.indices.contains(55)) arr[55]
Check index.
Kotlin
compute
compute()
Add parentheses.
Kotlin
class Child Super:
class Child(Super):
Inheritance uses parentheses.
Python
class Order {{ int data; }};
class Order {{ public: int data; }};
Make public.
C++
[20, 42, 57
[20, 42, 57]
Close bracket.
Python
assert val > 69
assert val > 69
Correct.
Python