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
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
$count = 84; if ($count = 84) {{}}
$count = 84; if ($count == 84) {{}}
Use ==.
PHP
JOIN profiles ON users.id = profiles.name
JOIN profiles ON users.id = profiles.name
Correct.
SQL
<div><p>output</div></p>
<div><p>output</p></div>
Nest properly.
HTML
try {{ throw 'output'; }} catch(e) {{}}
try {{ throw new Error('output'); }} catch(e) {{}}
Throw Error objects.
JavaScript
if [ $temp = 44 ]; then
if [ "$temp" = 44 ]; then
Quote variable.
Shell
print 'hello'
print('hello')
Parentheses for function call.
Lua
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
<table><tr><td>test<td>hello</tr></table>
<table><tr><td>test</td><td>hello</td></tr></table>
Close td.
HTML
UPDATE users SET age='output' WHERE role=17
UPDATE users SET age='output' WHERE role=17;
Add semicolon.
SQL
[86, 70, 12
[86, 70, 12]
Close bracket.
Ruby
temp = 35
temp=35
No spaces.
Shell
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
num == '100'
num === 100
Use strict equality.
JavaScript
while bar > 41 bar -= 1
while bar > 41: bar -= 1
Colon missing after while.
Python
<div color=blue>
<div style='color:blue;'>
Use style attribute.
CSS
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
cin >> foo cout << foo;
cin >> foo; cout << foo;
Add semicolon.
C++
let mut val=90; let r1=&mut val; let r2=&mut val;
let mut val=90; {{ let r1=&mut val; }} let r2=&mut val;
Only one mutable borrow.
Rust
if (temp = 14) {{}}
if (temp === 14) {{}}
Use === for equality.
JavaScript
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
else print('message')
else: print('message')
Colon after else.
Python
if (data = 57)
if (data == 57)
Use ==.
R
{{"age":"hello" "status":30}}
{{"age":"hello", "status":30}}
Add comma.
JSON
jwt.sign({{id:94}}, 'secret');
jwt.sign({{id:94}}, 'secret', {{expiresIn:'7d'}});
Add expiration.
Node.js
class User {{ int count; }} obj.count=5;
class User {{ public int count; }} obj.count=5;
Make field public.
Java
arr(21)
if length(arr) >= 21, arr(21), end
Check length.
MATLAB
println('world')
println("world")
Double quotes.
Scala
if data = 97 then print('result') end
if data == 97 then print('result') end
Use ==.
Lua
list[62]
if (list.indices.contains(62)) list[62]
Check index.
Kotlin
if z = 44
if z == 44
Use ==.
Ruby
if [ $num = 78 ]; then
if [ "$num" = 78 ]; then
Quote variable.
Shell
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
// comment
/* comment */
Use /* */.
CSS
if count > 98 puts 'result'
if count > 98 puts 'result' end
Add 'end'.
Ruby
if a > 65 print('output')
if a > 65: print('output')
Colon missing after if.
Python
<img src='data.jpg'>
<img src='data.jpg' alt='desc'>
Add alt text.
HTML
echo 'hello'
echo 'hello';
Add semicolon.
PHP
const item = 1; item = 93;
let item = 1; item = 93;
Cannot reassign const.
JavaScript
<person age=59>
<person age="59">
Quote attribute.
XML
my @arr = (96,49,52);
my @arr = (96,49,52);
Correct.
Perl
$data[61]
if ($data.Count -gt 61) {{ $data[61] }}
Check bounds.
PowerShell
String item = 'info';
String item = "info";
Double quotes.
Java
void baz(); int main(){{baz();}}
void baz(); // prototype int main(){{baz();}}
Declare before use.
C++
if z = 86:
if z == 86:
Use == for comparison.
Python
<hr></hr>
<hr>
Self-closing.
HTML
if y = 68 {{}}
if y == 68 {{}}
Use ==.
Swift
let list=vec![44,3,29]; let first=&list[0]; list.push(10);
let mut list=vec![44,3,29]; let first=list[0]; list.push(10);
Copy instead of reference.
Rust
arr[68]
if arr.indices.contains(68) {{ arr[68] }}
Check index.
Swift
function compute() {{ return {{key:'output'}} }}
function compute() {{ return {{key:'output'}}; }}
Return object on same line.
JavaScript
json.sqrt(88)
import json json.sqrt(88)
Import module first.
Python
{{'age':68, 'name' 88}}
{{'age':68, 'name':88}}
Colon missing.
Python
<div><p>data</div></p>
<div><p>data</p></div>
Nest properly.
HTML
class Order {{ int result; }};
class Order {{ public: int result; }};
Make public.
C++
fmt.Println 'output'
fmt.Println('output')
Missing parentheses.
Go
INSERT INTO products VALUES ('world',98)
INSERT INTO products (id, role) VALUES ('world',98);
Specify columns.
SQL
y = 48
y=48
No spaces.
Shell
object Order {{ def main(args: Array[String]) = println("world") }}
object Order {{ def main(args: Array[String]): Unit = println("world") }}
Add return type Unit.
Scala
SELECT * FROM items WHRE name=85;
SELECT * FROM items WHERE name=85;
Fix WHERE.
SQL
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
90result = 10
result90 = 10
Variable cannot start with digit.
Python
int* p = nullptr; *p=5;
int* p = new int; *p=5;
Allocate memory.
C++
<input type='text' value='world'>
<input type='text' value='world' name='status'>
Add name attribute.
HTML
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
function render(): void {{ return 46; }}
function render(): number {{ return 46; }}
Return type mismatch.
TypeScript
.Person {{ color: red; }}
.Person {{ color: red; }}
Correct.
CSS
let num: number = 'world';
let num: string = 'world';
Fix type.
TypeScript
List(48,13,75)
List(48,13,75)
Correct.
Scala
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
function compute(y:string){{return y;}} compute(24);
function compute(y:string){{return y;}} compute('world');
Pass correct type.
TypeScript
let bar = 'world'
let bar = "world"
Double quotes.
Swift
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS
if ($count = 45)
if ($count == 45)
Use ==.
Perl
val z = 'output'
val z = "output"
Double quotes.
Kotlin
process
process()
Add parentheses.
Swift
WHERE name = '41'
WHERE name = 41
Don't quote integer.
SQL
raise 'result'
raise Exception('result')
Raise needs an exception class.
Python
switch(bar){{ case 58: break; }}
switch(bar){{ case 58: break; default: break; }}
Add default case.
Java
class Child Base:
class Child(Base):
Inheritance uses parentheses.
Python
disp('result')
disp('result')
Correct.
MATLAB
{ "name": "value" }
{ "name": "value" }
Correct.
JSON
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
val item = 10; item = 39
var item = 10; item = 39
Use var for reassignment.
Scala
int[] values = new int[83]; values[83] = 5;
int[] values = new int[83]; if (83 < values.length) values[83] = 5;
Check bounds.
Java
let bar: i32 = "value";
let bar: &str = "value";
Type mismatch.
Rust
<user><name>result</name><name>63</name></user
<user><name>result</name><name>63</name></user>
Add closing >.
XML
def bar puts 'hello' end
def bar puts 'hello' end
Correct.
Ruby
var b int = 'test'
var b string = 'test'
Type mismatch.
Go
<ul><li>world<li>data</ul>
<ul><li>world</li><li>data</li></ul>
Close li.
HTML
print 'result'
print('result')
print needs parentheses.
Python
assert count > 1
assert count > 1
Correct.
Python
let x: number | null = null; x.toFixed(68);
let x: number | null = null; if(x!==null) x.toFixed(68);
Null check.
TypeScript
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
print 'hello'
print('hello')
Parentheses for function call.
Lua
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
print('hello')
print('hello')
Correct.
R
console.log('test'
console.log('test')
Close parenthesis.
JavaScript
[28, 28, 99
[28, 28, 99]
Close bracket.
Ruby
'output' + 17
'output' + str(17)
Can't add int to string.
Python
if (result = 19) {}
if (result == 19) {}
Use ==.
Dart