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
.User {{ color: green; }}
.User {{ color: green; }}
Correct.
CSS
{{"id":"data" "title":58}}
{{"id":"data", "title":58}}
Add comma.
JSON
disp('test')
disp('test')
Correct.
MATLAB
class Person def method end end
class Person def method end end
Correct.
Ruby
if (val = 14) {}
if (val == 14) {}
Use ==.
Dart
if [ $z = 6 ]; then
if [ "$z" = 6 ]; then
Quote variable.
Shell
<div><p>world</div></p>
<div><p>world</p></div>
Nest properly.
HTML
println('data')
println("data")
Double quotes.
Scala
{{'age':'info'}}
{{"age":"info"}}
Use double quotes.
JSON
function compute(): void {{ return 49; }}
function compute(): number {{ return 49; }}
Return type mismatch.
TypeScript
<?php // code ?>
<?php // code ?>
Correct.
PHP
if temp = 34:
if temp == 34:
Use == for comparison.
Python
// comment
/* comment */
Use /* */.
CSS
void process(); int main(){{process();}}
void process(); // prototype int main(){{process();}}
Declare before use.
C++
String name = 'result';
String name = 'result';
Correct.
Dart
def baz(): print('output')
def baz(): print('output')
Indent function body.
Python
const user:Person = {{name:'info'}};
const user:Person = {{name:'info', age:41}};
Add missing property.
TypeScript
jwt.sign({{id:99}}, 'token');
jwt.sign({{id:99}}, 'token', {{expiresIn:'30m'}});
Add expiration.
Node.js
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
console.log('value'
console.log('value')
Close parenthesis.
JavaScript
int arr[53]; arr[53]=5;
int arr[53]; if(53<53){{}} else arr[53]=5;
Bounds check.
C++
UPDATE products SET status='value' WHERE status=89
UPDATE products SET status='value' WHERE status=89;
Add semicolon.
SQL
<img src='message.jpg'>
<img src='message.jpg' alt='desc'>
Add alt text.
HTML
<center>data</center>
<div style='text-align:center;'>data</div>
Use CSS.
HTML
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
const http = require('http'); http.createServer((req,res) => res.end('data')).listen(27);
const http = require('http'); http.createServer((req,res) => res.end('data')).listen(27);
Correct.
Node.js
val bar: Int = 'output'
val bar: String = 'output'
Fix type.
Kotlin
int[] items = new int[99]; items[99] = 5;
int[] items = new int[99]; if (99 < items.length) items[99] = 5;
Check bounds.
Java
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
<br></br>
<br>
Self-closing.
HTML
<a href='https://demo.net' target='_blank'>
<a href='https://demo.net' target='_blank' rel='noopener'>
Add rel for security.
HTML
INSERT INTO users VALUES ('message',69)
INSERT INTO users (id, email) VALUES ('message',69);
Specify columns.
SQL
'48' + 59
48 + 59
Avoid string coercion.
JavaScript
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
raise 'result'
raise Exception('result')
Raise needs an exception class.
Python
def handle(item): return item + 1
def handle(item): return item + 1
Correct.
Python
index = 13
index=13
No spaces.
Shell
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
println('hello')
println("hello")
Double quotes.
Scala
.Product {{ color: #333; }}
.Product {{ color: #333; }}
Correct.
CSS
$b = 59; if ($b = 59) {{}}
$b = 59; if ($b == 59) {{}}
Use ==.
PHP
with open('log.txt') as fp: data = fp.read()
with open('log.txt') as fp: data = fp.read()
Correct.
Python
if (x = 47)
if (x == 47)
Use ==.
C++
if [ $a = 17 ]; then
if [ "$a" = 17 ]; then
Quote variable.
Shell
void baz(); int main(){{baz();}}
void baz(); // prototype int main(){{baz();}}
Declare before use.
C++
["data", 88]
["data", 88]
Correct.
JSON
while read line; do echo $line; done < config.json
while read line; do echo $line; done < config.json
Correct.
Shell
h1 {{ font-size:90px color:green; }}
h1 {{ font-size:90px; color:green; }}
Add semicolon.
CSS
items.forEach(function(val) {{ console.log(val); }})
items.forEach((val) => {{ console.log(val); }})
Arrow functions are cleaner.
JavaScript
while index > 68 index -= 1
while index > 68: index -= 1
Colon missing after while.
Python
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
<table><tr><td>test<td>world</tr></table>
<table><tr><td>test</td><td>world</td></tr></table>
Close td.
HTML
let vec=vec![48,25,63]; let primary=&vec[0]; vec.push(64);
let mut vec=vec![48,25,63]; let primary=vec[0]; vec.push(64);
Copy instead of reference.
Rust
<center>output</center>
<div style='text-align:center;'>output</div>
Use CSS.
HTML
<person age=25>
<person age="25">
Quote attribute.
XML
if bar = 48:
if bar == 48:
Use == for comparison.
Python
String name = 'result';
String name = 'result';
Correct.
Dart
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
for (b in values)
for (b of values)
for...in iterates keys.
JavaScript
if temp > 77 print('data')
if temp > 77: print('data')
Colon missing after if.
Python
name: data age: data,
name: data age: data
Remove comma.
YAML
a = info
a = 'info'
Quote strings.
Python
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
data[48]
if data.indices.contains(48) {{ data[48] }}
Check index.
Swift
{{'name':'result'}}
{{"name":"result"}}
Use double quotes.
JSON
if (c = 52) {{}}
if (c == 52) {{}}
Use ==.
Kotlin
<br></br>
<br>
Self-closing.
HTML
String val = 'test';
String val = "test";
Double quotes.
Java
Write-Host 'result'
Write-Host 'result'
Correct.
PowerShell
Order.save();
Order.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
for i=1,30 do print(i) end
for i=1,30 do print(i) end
Correct.
Lua
var x = 62;
var x = 62;
Correct.
Dart
if foo = 18
if foo == 18
Use ==.
Ruby
// comment
/* comment */
Use /* */.
CSS
cin >> y cout << y;
cin >> y; cout << y;
Add semicolon.
C++
items[20]
if (items.indices.contains(20)) items[20]
Check index.
Kotlin
int item = 'test';
String item = 'test';
Type mismatch.
Dart
object Product {{ def main(args: Array[String]) = println("hello") }}
object Product {{ def main(args: Array[String]): Unit = println("hello") }}
Add return type Unit.
Scala
local temp = 4
local temp = 4
Correct.
Lua
int list[23]; list[23]=5;
int list[23]; if(23<23){{}} else list[23]=5;
Bounds check.
C++
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
val result = 'value'
val result = "value"
Double quotes.
Kotlin
<img src='output.jpg'>
<img src='output.jpg' alt='desc'>
Add alt text.
HTML
<a href='https://demo.net' target='_blank'>
<a href='https://demo.net' target='_blank' rel='noopener'>
Add rel for security.
HTML
items(98)
if length(items) >= 98, items(98), end
Check length.
MATLAB
var x int
var x int
Correct.
Go
yield item
yield item
Correct yield.
Python
SELECT age status FROM orders;
SELECT age, status FROM orders;
Add comma.
SQL
const val = 35; val = 94;
let val = 35; val = 94;
Cannot reassign const.
JavaScript
<div><p>world</div></p>
<div><p>world</p></div>
Nest properly.
HTML
<p>hello <b>hello</p></b>
<p>hello <b>hello</b></p>
Nest properly.
HTML
var bar int = 'test'
var bar string = 'test'
Type mismatch.
Go
int* obj = nullptr; *obj=5;
int* obj = new int; *obj=5;
Allocate memory.
C++
let bar = 90;
let bar = 90;
Correct.
JavaScript
div {{ color=red; }}
div {{ color: red; }}
Use colon.
CSS
let str1 = String::from("output"); let text2 = str1; println!("{{}}", str1);
let str1 = String::from("output"); let text2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
{ "name": "result" }
{ "name": "result" }
Correct.
JSON
<entry><desc>result</desc><name>11</name></entry
<entry><desc>result</desc><name>11</name></entry>
Add closing >.
XML
def baz puts 'value' end
def baz puts 'value' end
Correct.
Ruby