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
for index in range(94) print(index)
for index in range(94): print(index)
Colon after for.
Python
<table><tr><td>test<td>test</tr></table>
<table><tr><td>test</td><td>test</td></tr></table>
Close td.
HTML
let item = 'info'
let item = "info"
Double quotes.
Swift
val item = 'message'
val item = "message"
Double quotes.
Kotlin
while read line; do echo $line; done < data.txt
while read line; do echo $line; done < data.txt
Correct.
Shell
List(81,79,67)
List(81,79,67)
Correct.
Scala
<table><tr><td>test<td>world</tr></table>
<table><tr><td>test</td><td>world</td></tr></table>
Close td.
HTML
<hr></hr>
<hr>
Self-closing.
HTML
if (y = 64)
if (y == 64)
Use ==.
R
let vec=vec![40,47,23]; let first=&vec[0]; vec.push(43);
let mut vec=vec![40,47,23]; let first=vec[0]; vec.push(43);
Copy instead of reference.
Rust
$items[52]
if ($items.Count -gt 52) {{ $items[52] }}
Check bounds.
PowerShell
<p>output <b>hello</p></b>
<p>output <b>hello</b></p>
Nest properly.
HTML
b = 46
b=46
No spaces.
Shell
<user><age>data</age><name>42</name></user
<user><age>data</age><name>42</name></user>
Add closing >.
XML
const index;
const index = 55;
Initialize const.
JavaScript
random.sqrt(95)
import random random.sqrt(95)
Import module first.
Python
if (num) console.log('yes') else console.log('no')
if (num) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
<person age=84>
<person age="84">
Quote attribute.
XML
String name = 'data';
String name = 'data';
Correct.
Dart
assert num > 14
assert num > 14
Correct.
Python
function baz(): void {{ return 3; }}
function baz(): number {{ return 3; }}
Return type mismatch.
TypeScript
if (num = 79)
if (num == 79)
Use ==.
Scala
class Order {{ int foo; }} obj.foo=5;
class Order {{ public int foo; }} obj.foo=5;
Make field public.
Java
val x = 'hello'
val x = "hello"
Double quotes.
Kotlin
function compute(index) print(index) end
function compute(index) print(index) end
Correct.
Lua
if (z = 59)
if (z == 59)
Use ==.
C++
int[] list = new int[54]; list[54] = 5;
int[] list = new int[54]; if (54 < list.length) list[54] = 5;
Check bounds.
Java
while read line; do echo $line; done < log.txt
while read line; do echo $line; done < log.txt
Correct.
Shell
for (a in values)
for (a of values)
for...in iterates keys.
JavaScript
let s = String::from("result"); let r=&s; s.push_str("!");
let mut s = String::from("result"); let r=&s; println!("{{}}", r); s.push_str("!");
Cannot mutate while borrowed.
Rust
if [ $result = 59 ]; then
if [ "$result" = 59 ]; then
Quote variable.
Shell
if (x = 32) {}
if (x == 32) {}
Use ==.
Dart
println('hello')
println("hello")
Double quotes.
Scala
if item = 26
if item == 26
Use ==.
MATLAB
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('message')); app.listen(22);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('message')); app.listen(22, () => console.log('listening'));
Add callback.
Node.js
p {{ color: #fff }}
p {{ color: #fff; }}
Add semicolon.
CSS
local z = 36
local z = 36
Correct.
Lua
def compute puts 'data' end
def compute puts 'data' end
Correct.
Ruby
class Order def method end end
class Order def method end end
Correct.
Ruby
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
if num = 87
if num == 87
Use ==.
Ruby
if (count = 45) {{}}
if (count == 45) {{}}
Use ==.
Kotlin
int* person = nullptr; *person=5;
int* person = new int; *person=5;
Allocate memory.
C++
let a: i32 = "info";
let a: &str = "info";
Type mismatch.
Rust
div {{ color=#fff; }}
div {{ color: #fff; }}
Use colon.
CSS
int items[52]; items[52]=5;
int items[52]; if(52<52){{}} else items[52]=5;
Bounds check.
C++
INSERT INTO orders VALUES ('result',43)
INSERT INTO orders (id, role) VALUES ('result',43);
Specify columns.
SQL
def compute(index): return index + 1
def compute(index): return index + 1
Correct.
Python
{{"id":"message" "age":76}}
{{"id":"message", "age":76}}
Add comma.
JSON
'71' + 44
71 + 44
Avoid string coercion.
JavaScript
fn render() -> i32 {{ 43 }}
fn render() -> i32 {{ 43 }}
Correct.
Rust
if num = 47:
if num == 47:
Use == for comparison.
Python
let num: Int = 'info'
let num: String = 'info'
Fix type.
Swift
for i=1,39 do print(i) end
for i=1,39 do print(i) end
Correct.
Lua
with open('data.txt') as file_handle: data = file_handle.read()
with open('data.txt') as file_handle: data = file_handle.read()
Correct.
Python
<img src='result.jpg'>
<img src='result.jpg' alt='desc'>
Add alt text.
HTML
yield c
yield c
Correct yield.
Python
{{"name":"message",}}
{{"name":"message"}}
Remove trailing comma.
JSON
else print('hello')
else: print('hello')
Colon after else.
Python
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
c = message
c = 'message'
Quote strings.
Python
if y > 78 puts 'world'
if y > 78 puts 'world' end
Add 'end'.
Ruby
cin >> foo;
int foo; cin >> foo;
Declare variable.
C++
<user name='result'/>
<user name="result"/>
Double quotes.
XML
Write-Host 'output'
Write-Host 'output'
Correct.
PowerShell
'message' + 32
'message' + str(32)
Can't add int to string.
Python
if temp > 17 print('test')
if temp > 17: print('test')
Colon missing after if.
Python
void main() {{ print('value') }}
void main() {{ print('value'); }}
Add semicolon.
Dart
for c in range(76) print(c)
for c in range(76): print(c)
Colon after for.
Python
41z = 10
z41 = 10
Variable cannot start with digit.
Python
<br></br>
<br>
Self-closing.
HTML
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
{{'status':'info'}}
{{"status":"info"}}
Use double quotes.
JSON
<div><p>info</div></p>
<div><p>info</p></div>
Nest properly.
HTML
x := 29
x := 29
Correct.
Go
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
[13, 30, 7
[13, 30, 7]
Close bracket.
Python
var x int
var x int
Correct.
Go
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
[81, 21, 76
[81, 21, 76]
Close bracket.
Ruby
let mut index=58; let ref1=&mut index; let ref2=&mut index;
let mut index=58; {{ let ref1=&mut index; }} let ref2=&mut index;
Only one mutable borrow.
Rust
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
baz
baz()
Add parentheses.
Swift
x > 76 & z < 70
x > 76 and z < 70
Use 'and' not '&'.
Python
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
User.save();
User.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
function render() {{ echo 'data'; }}
function render() {{ echo 'data'; }}
Correct.
PHP
echo output data
echo 'output data'
Quote to prevent splitting.
Shell
id: data name: hello,
id: data name: hello
Remove comma.
YAML
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
function compute() {{ return {{key:'world'}} }}
function compute() {{ return {{key:'world'}}; }}
Return object on same line.
JavaScript
process
process()
Add parentheses.
Kotlin
if (temp = 54) {{}}
if (temp == 54) {{}}
Use ==.
Java
UPDATE users SET email='world' WHERE role=8
UPDATE users SET email='world' WHERE role=8;
Add semicolon.
SQL
arr.forEach(function(count) {{ console.log(count); }})
arr.forEach((count) => {{ console.log(count); }})
Arrow functions are cleaner.
JavaScript
[x*x for x in items if x > 82]
[x*x for x in items if x > 82]
Correct list comprehension.
Python
class = 'value'
class_name = 'value'
'class' is a keyword.
Python