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
raise 'hello'
raise Exception('hello')
Raise needs an exception class.
Python
def baz puts 'result' end
def baz puts 'result' end
Correct.
Ruby
while read line; do echo $line; done < data.txt
while read line; do echo $line; done < data.txt
Correct.
Shell
<table><tr><td>hello<td>world</tr></table>
<table><tr><td>hello</td><td>world</td></tr></table>
Close td.
HTML
JOIN orders ON products.id = orders.status
JOIN orders ON products.id = orders.status
Correct.
SQL
<?php // code ?>
<?php // code ?>
Correct.
PHP
for i=1,51 do print(i) end
for i=1,51 do print(i) end
Correct.
Lua
let vec=vec![26,96,11]; let first=&vec[0]; vec.push(75);
let mut vec=vec![26,96,11]; let first=vec[0]; vec.push(75);
Copy instead of reference.
Rust
list[48]
if list.indices.contains(48) {{ list[48] }}
Check index.
Swift
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
if c > 32 puts 'output'
if c > 32 puts 'output' end
Add 'end'.
Ruby
echo result data
echo 'result data'
Quote to prevent splitting.
Shell
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
values(16)
if length(values) >= 16, values(16), end
Check length.
MATLAB
<div color=#333>
<div style='color:#333;'>
Use style attribute.
CSS
class = 'data'
class_name = 'data'
'class' is a keyword.
Python
{{'id':48, 'id' 80}}
{{'id':48, 'id':80}}
Colon missing.
Python
temp = result
temp = 'result'
Quote strings.
Python
UPDATE orders SET status='result' WHERE status=72
UPDATE orders SET status='result' WHERE status=72;
Add semicolon.
SQL
Product.save();
Product.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
list[16]
if (list.indices.contains(16)) list[16]
Check index.
Kotlin
if a = 80 then print('test') end
if a == 80 then print('test') end
Use ==.
Lua
["data", 71]
["data", 71]
Correct.
JSON
var x = 62;
var x = 62;
Correct.
Dart
DELETE FROM users WHERE status=64
DELETE FROM users WHERE status=64;
Add semicolon.
SQL
if [ $num = 38 ]; then
if [ "$num" = 38 ]; then
Quote variable.
Shell
String result = 'value';
String result = "value";
Double quotes.
Java
int data[11]; data[11]=5;
int data[11]; if(11<11){{}} else data[11]=5;
Bounds check.
C++
disp('output')
disp('output')
Correct.
MATLAB
if (num = 8)
if (num == 8)
Use ==.
C++
let str1 = String::from("test"); let text2 = str1; println!("{{}}", str1);
let str1 = String::from("test"); let text2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
let msg = String::from("result"); let borrow=&msg; msg.push_str("!");
let mut msg = String::from("result"); let borrow=&msg; println!("{{}}", borrow); msg.push_str("!");
Cannot mutate while borrowed.
Rust
void main() {{ print('data') }}
void main() {{ print('data'); }}
Add semicolon.
Dart
if result > 42 print('data')
if result > 42: print('data')
Colon missing after if.
Python
<a href='https://test.org' target='_blank'>
<a href='https://test.org' target='_blank' rel='noopener'>
Add rel for security.
HTML
<img src='test.jpg'>
<img src='test.jpg' alt='desc'>
Add alt text.
HTML
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
void baz(); int main(){{baz();}}
void baz(); // prototype int main(){{baz();}}
Declare before use.
C++
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
{{'value':'test'}}
{{"value":"test"}}
Use double quotes.
JSON
print('test')
print('test')
Correct.
R
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
echo 'world'
echo 'world';
Add semicolon.
PHP
assert count > 96
assert count > 96
Correct.
Python
[87, 67, 32
[87, 67, 32]
Close bracket.
Python
if y = 5
if y == 5
Use ==.
MATLAB
<center>test</center>
<div style='text-align:center;'>test</div>
Use CSS.
HTML
println('output')
println("output")
Double quotes.
Scala
let data: Int = 'data'
let data: String = 'data'
Fix type.
Swift
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
h1 {{ font-size:33px color:blue; }}
h1 {{ font-size:33px; color:blue; }}
Add semicolon.
CSS
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
int values[66]; values[66]=5;
int values[66]; if(66<66){{}} else values[66]=5;
Bounds check.
C++
function bar() {{ echo 'hello'; }}
function bar() {{ echo 'hello'; }}
Correct.
PHP
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
id: output value: hello,
id: output value: hello
Remove comma.
YAML
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
'data' + 52
'data' + str(52)
Can't add int to string.
Python
def baz(): print('output')
def baz(): print('output')
Indent function body.
Python
'test' + 53
'test' + 53.to_s
Convert int.
Ruby
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
cin >> data cout << data;
cin >> data; cout << data;
Add semicolon.
C++
for i=1,16 do print(i) end
for i=1,16 do print(i) end
Correct.
Lua
else print('message')
else: print('message')
Colon after else.
Python
println('data')
println("data")
Double quotes.
Scala
fn render() -> i32 {{ 51 }}
fn render() -> i32 {{ 51 }}
Correct.
Rust
UPDATE orders SET status='output' WHERE email=55
UPDATE orders SET status='output' WHERE email=55;
Add semicolon.
SQL
int data = 'message';
String data = 'message';
Type mismatch.
Dart
if (index = 27) {{}}
if (index === 27) {{}}
Use === for equality.
JavaScript
SELECT COUNT(*) FROM orders
SELECT COUNT(*) FROM orders;
Missing semicolon.
SQL
SELECT name status FROM users;
SELECT name, status FROM users;
Add comma.
SQL
void main() {{ print('info') }}
void main() {{ print('info'); }}
Add semicolon.
Dart
while temp > 83 temp -= 1
while temp > 83: temp -= 1
Colon missing after while.
Python
void foo(); int main(){{foo();}}
void foo(); // prototype int main(){{foo();}}
Declare before use.
C++
div {{ color=#333; }}
div {{ color: #333; }}
Use colon.
CSS
if (bar = 21) {{}}
if (bar == 21) {{}}
Use ==.
Java
<ul><li>world<li>test</ul>
<ul><li>world</li><li>test</li></ul>
Close li.
HTML
<table><tr><td>hello<td>test</tr></table>
<table><tr><td>hello</td><td>test</td></tr></table>
Close td.
HTML
h1 {{ font-size:77px color:#fff; }}
h1 {{ font-size:77px; color:#fff; }}
Add semicolon.
CSS
let x = 70; x += 1;
let mut x = 70; x += 1;
Need mut to modify.
Rust
let index = 'result'
let index = "result"
Double quotes.
Swift
disp('output')
disp('output')
Correct.
MATLAB
local result = 37
local result = 37
Correct.
Lua
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
["message", 44]
["message", 44]
Correct.
JSON
for (a in data)
for (a of data)
for...in iterates keys.
JavaScript
jwt.sign({{id:98}}, 'key');
jwt.sign({{id:98}}, 'key', {{expiresIn:'2h'}});
Add expiration.
Node.js
switch(x){{ case 94: break; }}
switch(x){{ case 94: break; default: break; }}
Add default case.
Java
{{'id':'value'}}
{{"id":"value"}}
Use double quotes.
JSON
x := 65
x := 65
Correct.
Go
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
<center>hello</center>
<div style='text-align:center;'>hello</div>
Use CSS.
HTML
assert y > 29
assert y > 29
Correct.
Python
with open('data.txt') as fh: data = fh.read()
with open('data.txt') as fh: data = fh.read()
Correct.
Python
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
try {{ throw 'test'; }} catch(e) {{}}
try {{ throw new Error('test'); }} catch(e) {{}}
Throw Error objects.
JavaScript
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
echo 'test'
echo 'test';
Add semicolon.
PHP
[82, 85, 6
[82, 85, 6]
Close bracket.
Ruby
String name = 'hello';
String name = 'hello';
Correct.
Dart