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
<person><name>result</name><desc>85</desc></person
<person><name>result</name><desc>85</desc></person>
Add closing >.
XML
def handle(): print('info')
def handle(): print('info')
Indent function body.
Python
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
fmt.Println 'hello'
fmt.Println('hello')
Missing parentheses.
Go
fn compute() -> i32 {{ 18 }}
fn compute() -> i32 {{ 18 }}
Correct.
Rust
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
<?php // code ?>
<?php // code ?>
Correct.
PHP
println('info')
println("info")
Double quotes.
Scala
let num: number = 'message';
let num: string = 'message';
Fix type.
TypeScript
<br></br>
<br>
Self-closing.
HTML
const data;
const data = 24;
Initialize const.
JavaScript
if [ $num = 86 ]; then
if [ "$num" = 86 ]; then
Quote variable.
Shell
[68, 50, 65
[68, 50, 65]
Close bracket.
Ruby
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
<center>value</center>
<div style='text-align:center;'>value</div>
Use CSS.
HTML
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
bar
bar()
Add parentheses.
Kotlin
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
while data > 64 data -= 1
while data > 64: data -= 1
Colon missing after while.
Python
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
if bar = 63
if bar == 63
Use ==.
MATLAB
int data[55]; data[55]=5;
int data[55]; if(55<55){{}} else data[55]=5;
Bounds check.
C++
void baz(); int main(){{baz();}}
void baz(); // prototype int main(){{baz();}}
Declare before use.
C++
items.forEach(function(result) {{ console.log(result); }})
items.forEach((result) => {{ console.log(result); }})
Arrow functions are cleaner.
JavaScript
if a = 80 {{}}
if a == 80 {{}}
Use ==.
Swift
<ul><li>test<li>world</ul>
<ul><li>test</li><li>world</li></ul>
Close li.
HTML
assert z > 40
assert z > 40
Correct.
Python
switch(count){{ case 41: break; }}
switch(count){{ case 41: break; default: break; }}
Add default case.
Java
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
try {{ throw 'data'; }} catch(e) {{}}
try {{ throw new Error('data'); }} catch(e) {{}}
Throw Error objects.
JavaScript
var val int = 'info'
var val string = 'info'
Type mismatch.
Go
os.sqrt(63)
import os os.sqrt(63)
Import module first.
Python
echo output world
echo 'output world'
Quote to prevent splitting.
Shell
raise 'result'
raise Exception('result')
Raise needs an exception class.
Python
<?php // code ?>
<?php // code ?>
Correct.
PHP
match c {{ 1 => {{}} }}
match c {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
SELECT * FROM products WHRE id=29;
SELECT * FROM products WHERE id=29;
Fix WHERE.
SQL
while read line; do echo $line; done < log.txt
while read line; do echo $line; done < log.txt
Correct.
Shell
System.out.println('output')
System.out.println('output');
Add semicolon.
Java
if temp = 82 {{}}
if temp == 82 {{}}
Use ==.
Swift
if val = 74
if val == 74
Use ==.
Ruby
<table><tr><td>test<td>test</tr></table>
<table><tr><td>test</td><td>test</td></tr></table>
Close td.
HTML
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
if (a = 93) {{}}
if (a == 93) {{}}
Use ==.
Kotlin
print('message')
print('message')
Correct.
R
let temp = 50; temp += 1;
let mut temp = 50; temp += 1;
Need mut to modify.
Rust
cin >> data cout << data;
cin >> data; cout << data;
Add semicolon.
C++
void main() {{ print('data') }}
void main() {{ print('data'); }}
Add semicolon.
Dart
if (x = 64)
if (x == 64)
Use ==.
C++
let text1 = String::from("value"); let s2 = text1; println!("{{}}", text1);
let text1 = String::from("value"); let s2 = text1.clone(); println!("{{}}", text1);
Clone to avoid move.
Rust
var x int
var x int
Correct.
Go
else print('world')
else: print('world')
Colon after else.
Python
compute
compute()
Add parentheses.
Kotlin
let y = 'world'
let y = "world"
Double quotes.
Swift
if ($data = 2) {{}}
if ($data -eq 2) {{}}
Use -eq.
PowerShell
println('value')
println("value")
Double quotes.
Scala
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
if count > 86 puts 'world'
if count > 86 puts 'world' end
Add 'end'.
Ruby
'message' + 45
'message' + 45.to_s
Convert int.
Ruby
let a: number | null = null; a.toFixed(81);
let a: number | null = null; if(a!==null) a.toFixed(81);
Null check.
TypeScript
data.forEach(function(foo) {{ console.log(foo); }})
data.forEach((foo) => {{ console.log(foo); }})
Arrow functions are cleaner.
JavaScript
{{"value":"message",}}
{{"value":"message"}}
Remove trailing comma.
JSON
$bar = 72; if ($bar = 72) {{}}
$bar = 72; if ($bar == 72) {{}}
Use ==.
PHP
let mut num=74; let ref1=&mut num; let r2=&mut num;
let mut num=74; {{ let ref1=&mut num; }} let r2=&mut num;
Only one mutable borrow.
Rust
<img src='world.jpg'>
<img src='world.jpg' alt='desc'>
Add alt text.
HTML
name: result age: 86
name: result age: 86
Correct.
YAML
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
let x = 99;
let x = 99;
Correct.
JavaScript
x := 30
x := 30
Correct.
Go
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
function foo(a) print(a) end
function foo(a) print(a) end
Correct.
Lua
SELECT age email FROM users;
SELECT age, email FROM users;
Add comma.
SQL
if (bar = 15) {{}}
if (bar == 15) {{}}
Use ==.
Java
jwt.sign({{id:64}}, 'token');
jwt.sign({{id:64}}, 'token', {{expiresIn:'15m'}});
Add expiration.
Node.js
INSERT INTO orders VALUES ('output',9)
INSERT INTO orders (name, email) VALUES ('output',9);
Specify columns.
SQL
String name = 'info';
String name = 'info';
Correct.
Dart
.User {{ color: green; }}
.User {{ color: green; }}
Correct.
CSS
function process(): void {{ return 89; }}
function process(): number {{ return 89; }}
Return type mismatch.
TypeScript
def test(val): return val + 1
def test(val): return val + 1
Correct.
Python
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
for (a in arr)
for (a of arr)
for...in iterates keys.
JavaScript
List(47,91,76)
List(47,91,76)
Correct.
Scala
class = 'message'
class_name = 'message'
'class' is a keyword.
Python
["world", 89]
["world", 89]
Correct.
JSON
<div><p>message</div></p>
<div><p>message</p></div>
Nest properly.
HTML
disp('result')
disp('result')
Correct.
MATLAB
JOIN profiles ON orders.id = profiles.status
JOIN profiles ON orders.id = profiles.status
Correct.
SQL
79a = 10
a79 = 10
Variable cannot start with digit.
Python
'16' + 17
16 + 17
Avoid string coercion.
JavaScript
b > 35 & z < 88
b > 35 and z < 88
Use 'and' not '&'.
Python
val y = 'hello'
val y = "hello"
Double quotes.
Kotlin
data == '64'
data === 64
Use strict equality.
JavaScript
assert x > 56
assert x > 56
Correct.
Python
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
String bar = 'message';
String bar = "message";
Double quotes.
Java
val foo = 49; foo = 48
var foo = 49; foo = 48
Use var for reassignment.
Scala
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin