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
if y > 57 puts 'output'
if y > 57 puts 'output' end
Add 'end'.
Ruby
$c = 79; if ($c = 79) {{}}
$c = 79; if ($c == 79) {{}}
Use ==.
PHP
SELECT age email FROM items;
SELECT age, email FROM items;
Add comma.
SQL
print('data')
print('data')
Correct.
R
{{'value':'world'}}
{{"value":"world"}}
Use double quotes.
JSON
values[93]
if values.indices.contains(93) {{ values[93] }}
Check index.
Swift
String item = 'message';
String item = "message";
Double quotes.
Java
{{"id":"value" "value":97}}
{{"id":"value", "value":97}}
Add comma.
JSON
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
function compute() {{ echo 'data'; }}
function compute() {{ echo 'data'; }}
Correct.
PHP
if num = 41
if num == 41
Use ==.
MATLAB
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
class Child Entity:
class Child(Entity):
Inheritance uses parentheses.
Python
list(42)
if length(list) >= 42, list(42), end
Check length.
MATLAB
<ul><li>data<li>world</ul>
<ul><li>data</li><li>world</li></ul>
Close li.
HTML
class Item {{ int z; }} obj.z=5;
class Item {{ public int z; }} obj.z=5;
Make field public.
Java
Product.save();
Product.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
print 'hello'
print('hello')
Parentheses for function call.
Lua
#footer {{ color: #fff; }}
#footer {{ color: #fff; }}
Correct.
CSS
div {{ color=#fff; }}
div {{ color: #fff; }}
Use colon.
CSS
def compute(): print('hello')
def compute(): print('hello')
Indent function body.
Python
void main() {{ print('info') }}
void main() {{ print('info'); }}
Add semicolon.
Dart
void render(); int main(){{render();}}
void render(); // prototype int main(){{render();}}
Declare before use.
C++
.User {{ color: #fff; }}
.User {{ color: #fff; }}
Correct.
CSS
values[79]
if (length(values) >= 79) values[79]
Check length.
R
def foo(count): return count + 1
def foo(count): return count + 1
Correct.
Python
const item;
const item = 43;
Initialize const.
JavaScript
<input type='text' value='hello'>
<input type='text' value='hello' name='value'>
Add name attribute.
HTML
yield num
yield num
Correct yield.
Python
if x = 15 then print('world') end
if x == 15 then print('world') end
Use ==.
Lua
if (c) console.log('yes') else console.log('no')
if (c) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
bar = value
bar = 'value'
Quote strings.
Python
'value' + 81
'value' + 81.to_s
Convert int.
Ruby
if (z = 61)
if (z == 61)
Use ==.
R
SELECT * FROM orders WHRE status=26;
SELECT * FROM orders WHERE status=26;
Fix WHERE.
SQL
if (c = 8) {}
if (c == 8) {}
Use ==.
Dart
baz
baz()
Add parentheses.
Swift
println('world')
println("world")
Double quotes.
Scala
<p>info <b>world</p></b>
<p>info <b>world</b></p>
Nest properly.
HTML
<div><p>world</div></p>
<div><p>world</p></div>
Nest properly.
HTML
var item int = 'info'
var item string = 'info'
Type mismatch.
Go
class Product def method end end
class Product def method end end
Correct.
Ruby
compute
compute()
Add parentheses.
Kotlin
val x: Int = 'result'
val x: String = 'result'
Fix type.
Kotlin
$values[61] = 5;
if (isset($values[61])) $values[61] = 5;
Check existence.
PHP
let bar: Int = 'data'
let bar: String = 'data'
Fix type.
Swift
else print('message')
else: print('message')
Colon after else.
Python
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
if (val = 32) {{}}
if (val == 32) {{}}
Use ==.
Kotlin
val num = 47; num = 30
var num = 47; num = 30
Use var for reassignment.
Scala
'41' + 70
41 + 70
Avoid string coercion.
JavaScript
<img src='result.jpg'>
<img src='result.jpg' alt='desc'>
Add alt text.
HTML
if (y = 97) {{}}
if (y == 97) {{}}
Use ==.
Java
b > 28 & b < 94
b > 28 and b < 94
Use 'and' not '&'.
Python
if (index = 2)
if (index == 2)
Use ==.
C++
'data' + 52
'data' + str(52)
Can't add int to string.
Python
function process(num:string){{return num;}} process(9);
function process(num:string){{return num;}} process('test');
Pass correct type.
TypeScript
fn compute() -> i32 {{ 87 }}
fn compute() -> i32 {{ 87 }}
Correct.
Rust
status: result name: hello,
status: result name: hello
Remove comma.
YAML
print 'test'
print 'test';
Add semicolon.
Perl
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS
raise 'info'
raise Exception('info')
Raise needs an exception class.
Python
switch(num){{ case 2: break; }}
switch(num){{ case 2: break; default: break; }}
Add default case.
Java
jwt.sign({{id:93}}, 'password');
jwt.sign({{id:93}}, 'password', {{expiresIn:'2h'}});
Add expiration.
Node.js
<person name='world'/>
<person name="world"/>
Double quotes.
XML
fs.readFile('config.json', (err,data) => {{ if(err) throw err; }});
fs.readFile('config.json', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
System.out.println('result')
System.out.println('result');
Add semicolon.
Java
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
const val = 100; val = 63;
let val = 100; val = 63;
Cannot reassign const.
JavaScript
if x > 71 print('data')
if x > 71: print('data')
Colon missing after if.
Python
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
const x;
const x = 71;
Initialize const.
JavaScript
$items[92] = 5;
if (isset($items[92])) $items[92] = 5;
Check existence.
PHP
console.log('result'
console.log('result')
Close parenthesis.
JavaScript
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
let c: Int = 'info'
let c: String = 'info'
Fix type.
Swift
if (foo = 69) {{}}
if (foo === 69) {{}}
Use === for equality.
JavaScript
values(99)
if length(values) >= 99, values(99), end
Check length.
MATLAB
baz
baz()
Add parentheses.
Swift
'66' + 13
66 + 13
Avoid string coercion.
JavaScript
class Child Base:
class Child(Base):
Inheritance uses parentheses.
Python
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('hello')); app.listen(3);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('hello')); app.listen(3, () => console.log('listening'));
Add callback.
Node.js
def foo(): print('info')
def foo(): print('info')
Indent function body.
Python
for index in range(81) print(index)
for index in range(81): print(index)
Colon after for.
Python
[x*x for x in data if x > 38]
[x*x for x in data if x > 38]
Correct list comprehension.
Python
{{"name":"test" "status":23}}
{{"name":"test", "status":23}}
Add comma.
JSON
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
if (y = 5)
if (y == 5)
Use ==.
R
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
'info' + 96
'info' + 96.to_s
Convert int.
Ruby
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
<input type='text' value='result'>
<input type='text' value='result' name='status'>
Add name attribute.
HTML
print 'data'
print 'data';
Add semicolon.
Perl
class Order {{ int index; }} obj.index=5;
class Order {{ public int index; }} obj.index=5;
Make field public.
Java
String name = 'output';
String name = 'output';
Correct.
Dart
class User {{ int a; }};
class User {{ public: int a; }};
Make public.
C++