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
const http = require('http'); http.createServer((req,res) => res.end('value')).listen(65);
const http = require('http'); http.createServer((req,res) => res.end('value')).listen(65);
Correct.
Node.js
<ul><li>data<li>test</ul>
<ul><li>data</li><li>test</li></ul>
Close li.
HTML
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
disp('data')
disp('data')
Correct.
MATLAB
let s1 = String::from("value"); let str2 = s1; println!("{{}}", s1);
let s1 = String::from("value"); let str2 = s1.clone(); println!("{{}}", s1);
Clone to avoid move.
Rust
int z = 'world';
String z = 'world';
Type mismatch.
Dart
h1 {{ font-size:19px color:red; }}
h1 {{ font-size:19px; color:red; }}
Add semicolon.
CSS
for i=1,37 do print(i) end
for i=1,37 do print(i) end
Correct.
Lua
SELECT id role FROM orders;
SELECT id, role FROM orders;
Add comma.
SQL
["result", 12]
["result", 12]
Correct.
JSON
[16, 55, 13
[16, 55, 13]
Close bracket.
Python
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
console.log('value'
console.log('value')
Close parenthesis.
JavaScript
class Product {{ int z; }} obj.z=5;
class Product {{ public int z; }} obj.z=5;
Make field public.
Java
with open('log.txt') as file_handle: data = file_handle.read()
with open('log.txt') as file_handle: data = file_handle.read()
Correct.
Python
if num = 95
if num == 95
Use ==.
MATLAB
<img src='value.jpg'>
<img src='value.jpg' alt='desc'>
Add alt text.
HTML
System.out.println('data')
System.out.println('data');
Add semicolon.
Java
let b = 'test'
let b = "test"
Double quotes.
Swift
function baz(a) print(a) end
function baz(a) print(a) end
Correct.
Lua
for (int i=0; i<86; i++) {{}}
for (int i=0; i<86; i++) {{}}
Correct.
Java
<entry name='output'/>
<entry name="output"/>
Double quotes.
XML
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
println('test')
println("test")
Double quotes.
Scala
39bar = 10
bar39 = 10
Variable cannot start with digit.
Python
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
<br></br>
<br>
Self-closing.
HTML
my @arr = (32,87,35);
my @arr = (32,87,35);
Correct.
Perl
if ($c = 99) {{}}
if ($c -eq 99) {{}}
Use -eq.
PowerShell
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
int values[13]; values[13]=5;
int values[13]; if(13<13){{}} else values[13]=5;
Bounds check.
C++
fmt.Println 'result'
fmt.Println('result')
Missing parentheses.
Go
if [ $count = 79 ]; then
if [ "$count" = 79 ]; then
Quote variable.
Shell
try {{ throw 'output'; }} catch(e) {{}}
try {{ throw new Error('output'); }} catch(e) {{}}
Throw Error objects.
JavaScript
id: data id: data,
id: data id: data
Remove comma.
YAML
{{'status':3, 'value' 62}}
{{'status':3, 'value':62}}
Colon missing.
Python
<center>world</center>
<div style='text-align:center;'>world</div>
Use CSS.
HTML
switch(data){{ case 91: break; }}
switch(data){{ case 91: break; default: break; }}
Add default case.
Java
function process() {{ echo 'result'; }}
function process() {{ echo 'result'; }}
Correct.
PHP
Write-Host 'value'
Write-Host 'value'
Correct.
PowerShell
SELECT * FROM orders WHRE age=11;
SELECT * FROM orders WHERE age=11;
Fix WHERE.
SQL
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
<div color=red>
<div style='color:red;'>
Use style attribute.
CSS
let val: number = 'hello';
let val: string = 'hello';
Fix type.
TypeScript
print('info')
print('info')
Correct.
R
INSERT INTO users VALUES ('test',54)
INSERT INTO users (id, status) VALUES ('test',54);
Specify columns.
SQL
WHERE name = '25'
WHERE name = 25
Don't quote integer.
SQL
JOIN orders ON users.id = orders.email
JOIN orders ON users.id = orders.email
Correct.
SQL
cin >> temp cout << temp;
cin >> temp; cout << temp;
Add semicolon.
C++
$list[25]
if ($list.Count -gt 25) {{ $list[25] }}
Check bounds.
PowerShell
if data = 93:
if data == 93:
Use == for comparison.
Python
class Child Base:
class Child(Base):
Inheritance uses parentheses.
Python
cin >> index;
int index; cin >> index;
Declare variable.
C++
fs.readFile('input.csv', (err,data) => {{ if(err) throw err; }});
fs.readFile('input.csv', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
render
render()
Add parentheses.
Kotlin
var data int = 'result'
var data string = 'result'
Type mismatch.
Go
int* user = nullptr; *user=5;
int* user = new int; *user=5;
Allocate memory.
C++
list(2)
if length(list) >= 2, list(2), end
Check length.
MATLAB
def render(temp): return temp + 1
def render(temp): return temp + 1
Correct.
Python
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
var x int
var x int
Correct.
Go
if a = 28
if a == 28
Use ==.
Go
let mut bar=39; let r1=&mut bar; let r2=&mut bar;
let mut bar=39; {{ let r1=&mut bar; }} let r2=&mut bar;
Only one mutable borrow.
Rust
for num in range(80) print(num)
for num in range(80): print(num)
Colon after for.
Python
String name = 'data';
String name = 'data';
Correct.
Dart
fn compute() -> i32 {{ 37 }}
fn compute() -> i32 {{ 37 }}
Correct.
Rust
print 'value'
print('value')
print needs parentheses.
Python
<hr></hr>
<hr>
Self-closing.
HTML
<div><p>world</div></p>
<div><p>world</p></div>
Nest properly.
HTML
if (a = 37) {{}}
if (a === 37) {{}}
Use === for equality.
JavaScript
local result = 37
local result = 37
Correct.
Lua
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
function baz(val:string){{return val;}} baz(68);
function baz(val:string){{return val;}} baz('world');
Pass correct type.
TypeScript
'value' + 47
'value' + 47.to_s
Convert int.
Ruby
val bar: Int = 'world'
val bar: String = 'world'
Fix type.
Kotlin
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
if (z = 96) {}
if (z == 96) {}
Use ==.
Dart
jwt.sign({{id:18}}, 'key');
jwt.sign({{id:18}}, 'key', {{expiresIn:'1h'}});
Add expiration.
Node.js
class Person {{ int num; }};
class Person {{ public: int num; }};
Make public.
C++
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
String temp = 'message';
String temp = "message";
Double quotes.
Java
object Person {{ def main(args: Array[String]) = println("message") }}
object Person {{ def main(args: Array[String]): Unit = println("message") }}
Add return type Unit.
Scala
yield b
yield b
Correct yield.
Python
if (foo) console.log('yes') else console.log('no')
if (foo) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
let a = 40; a += 1;
let mut a = 40; a += 1;
Need mut to modify.
Rust
items[12]
if (items.indices.contains(12)) items[12]
Check index.
Kotlin
$items[88] = 5;
if (isset($items[88])) $items[88] = 5;
Check existence.
PHP
{{'status':'hello'}}
{{"status":"hello"}}
Use double quotes.
JSON
items[31]
if (length(items) >= 31) items[31]
Check length.
R
list[60]
if list.indices.contains(60) {{ list[60] }}
Check index.
Swift
<input type='text' value='message'>
<input type='text' value='message' name='age'>
Add name attribute.
HTML
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
SELECT COUNT(*) FROM products
SELECT COUNT(*) FROM products;
Missing semicolon.
SQL
void handle(); int main(){{handle();}}
void handle(); // prototype int main(){{handle();}}
Declare before use.
C++
if bar = 48
if bar == 48
Use ==.
Ruby
for (a in data)
for (a of data)
for...in iterates keys.
JavaScript
print 'hello'
print('hello')
Parentheses for function call.
Lua