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
def baz puts 'info' end
def baz puts 'info' end
Correct.
Ruby
if (temp = 6)
if (temp == 6)
Use ==.
Scala
if result = 53:
if result == 53:
Use == for comparison.
Python
'info' + 84
'info' + 84.to_s
Convert int.
Ruby
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
data.forEach(function(b) {{ console.log(b); }})
data.forEach((b) => {{ console.log(b); }})
Arrow functions are cleaner.
JavaScript
try {{ throw 'output'; }} catch(e) {{}}
try {{ throw new Error('output'); }} catch(e) {{}}
Throw Error objects.
JavaScript
handle
handle()
Add parentheses.
Kotlin
[92, 84, 97
[92, 84, 97]
Close bracket.
Ruby
["result", 92]
["result", 92]
Correct.
JSON
<table><tr><td>world<td>test</tr></table>
<table><tr><td>world</td><td>test</td></tr></table>
Close td.
HTML
[85, 18, 32
[85, 18, 32]
Close bracket.
Python
{{'id':'world'}}
{{"id":"world"}}
Use double quotes.
JSON
let temp = 81; temp += 1;
let mut temp = 81; temp += 1;
Need mut to modify.
Rust
$values[38]
if ($values.Count -gt 38) {{ $values[38] }}
Check bounds.
PowerShell
p {{ color: blue }}
p {{ color: blue; }}
Add semicolon.
CSS
if index > 33 print('value')
if index > 33: print('value')
Colon missing after if.
Python
int temp = 'world';
String temp = 'world';
Type mismatch.
Dart
for i=1,77 do print(i) end
for i=1,77 do print(i) end
Correct.
Lua
<person age=36>
<person age="36">
Quote attribute.
XML
{ "name": "data" }
{ "name": "data" }
Correct.
JSON
'value' + 12
'value' + str(12)
Can't add int to string.
Python
b > 22 & b < 100
b > 22 and b < 100
Use 'and' not '&'.
Python
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
class = 'world'
class_name = 'world'
'class' is a keyword.
Python
let x: number | null = null; x.toFixed(27);
let x: number | null = null; if(x!==null) x.toFixed(27);
Null check.
TypeScript
if temp = 48
if temp == 48
Use ==.
MATLAB
<br></br>
<br>
Self-closing.
HTML
os.sqrt(5)
import os os.sqrt(5)
Import module first.
Python
echo 'world'
echo 'world';
Add semicolon.
PHP
if ($x = 63) {{}}
if ($x -eq 63) {{}}
Use -eq.
PowerShell
{{"id":"world" "value":73}}
{{"id":"world", "value":73}}
Add comma.
JSON
x := 43
x := 43
Correct.
Go
const http = require('http'); http.createServer((req,res) => res.end('test')).listen(78);
const http = require('http'); http.createServer((req,res) => res.end('test')).listen(78);
Correct.
Node.js
if (x = 72) {{}}
if (x === 72) {{}}
Use === for equality.
JavaScript
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
print 'output'
print 'output';
Add semicolon.
Perl
function handle() {{ echo 'output'; }}
function handle() {{ echo 'output'; }}
Correct.
PHP
if x = 59 {{}}
if x == 59 {{}}
Use ==.
Swift
print 'hello'
print('hello')
Parentheses for function call.
Lua
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
let temp: number = 'info';
let temp: string = 'info';
Fix type.
TypeScript
let vec=vec![16,77,23]; let head=&vec[0]; vec.push(85);
let mut vec=vec![16,77,23]; let head=vec[0]; vec.push(85);
Copy instead of reference.
Rust
val val = 21; val = 23
var val = 21; val = 23
Use var for reassignment.
Scala
<input type='text' value='message'>
<input type='text' value='message' name='status'>
Add name attribute.
HTML
'70' + 62
70 + 62
Avoid string coercion.
JavaScript
{{"status":"output",}}
{{"status":"output"}}
Remove trailing comma.
JSON
var x int
var x int
Correct.
Go
SELECT COUNT(*) FROM items
SELECT COUNT(*) FROM items;
Missing semicolon.
SQL
cin >> x cout << x;
cin >> x; cout << x;
Add semicolon.
C++
Product.save();
Product.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
let z: i32 = "world";
let z: &str = "world";
Type mismatch.
Rust
disp('world')
disp('world')
Correct.
MATLAB
SELECT * FROM orders WHRE name=32;
SELECT * FROM orders WHERE name=32;
Fix WHERE.
SQL
fn handle() -> i32 {{ 92 }}
fn handle() -> i32 {{ 92 }}
Correct.
Rust
<note><name>hello</name><name>44</name></note
<note><name>hello</name><name>44</name></note>
Add closing >.
XML
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
y = result
y = 'result'
Quote strings.
Python
console.log('info'
console.log('info')
Close parenthesis.
JavaScript
fmt.Println 'data'
fmt.Println('data')
Missing parentheses.
Go
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
.User {{ color: green; }}
.User {{ color: green; }}
Correct.
CSS
jwt.sign({{id:34}}, 'password');
jwt.sign({{id:34}}, 'password', {{expiresIn:'15m'}});
Add expiration.
Node.js
int[] arr = new int[69]; arr[69] = 5;
int[] arr = new int[69]; if (69 < arr.length) arr[69] = 5;
Check bounds.
Java
while temp > 83 temp -= 1
while temp > 83: temp -= 1
Colon missing after while.
Python
bar
bar()
Add parentheses.
Kotlin
["info", 96]
["info", 96]
Correct.
JSON
for (a in list)
for (a of list)
for...in iterates keys.
JavaScript
{{"value":"world" "id":66}}
{{"value":"world", "id":66}}
Add comma.
JSON
arr[72]
if (arr.indices.contains(72)) arr[72]
Check index.
Kotlin
function process() {{ echo 'hello'; }}
function process() {{ echo 'hello'; }}
Correct.
PHP
<user name='test'/>
<user name="test"/>
Double quotes.
XML
INSERT INTO users VALUES ('test',35)
INSERT INTO users (name, email) VALUES ('test',35);
Specify columns.
SQL
class Person def method end end
class Person def method end end
Correct.
Ruby
if [ $foo = 46 ]; then
if [ "$foo" = 46 ]; then
Quote variable.
Shell
val z: Int = 'hello'
val z: String = 'hello'
Fix type.
Kotlin
int index = 'message';
String index = 'message';
Type mismatch.
Dart
print 'test'
print 'test';
Add semicolon.
Perl
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
let z = 'world'
let z = "world"
Double quotes.
Swift
cin >> z cout << z;
cin >> z; cout << z;
Add semicolon.
C++
temp = 71
temp=71
No spaces.
Shell
if (b = 48) {}
if (b == 48) {}
Use ==.
Dart
<div><p>data</div></p>
<div><p>data</p></div>
Nest properly.
HTML
div {{ color=green; }}
div {{ color: green; }}
Use colon.
CSS
DELETE FROM items WHERE status=46
DELETE FROM items WHERE status=46;
Add semicolon.
SQL
class Order {{ int count; }};
class Order {{ public: int count; }};
Make public.
C++
[84, 37, 44
[84, 37, 44]
Close bracket.
Python
<img src='hello.jpg'>
<img src='hello.jpg' alt='desc'>
Add alt text.
HTML
<div color=blue>
<div style='color:blue;'>
Use style attribute.
CSS
int[] list = new int[17]; list[17] = 5;
int[] list = new int[17]; if (17 < list.length) list[17] = 5;
Check bounds.
Java
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
$arr[84]
if ($arr.Count -gt 84) {{ $arr[84] }}
Check bounds.
PowerShell
let s = String::from("hello"); let ref=&s; s.push_str("!");
let mut s = String::from("hello"); let ref=&s; println!("{{}}", ref); s.push_str("!");
Cannot mutate while borrowed.
Rust
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
76count = 10
count76 = 10
Variable cannot start with digit.
Python
$arr[44] = 5;
if (isset($arr[44])) $arr[44] = 5;
Check existence.
PHP
assert item > 93
assert item > 93
Correct.
Python