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
DELETE FROM users WHERE id=85
DELETE FROM users WHERE id=85;
Add semicolon.
SQL
class Child Entity:
class Child(Entity):
Inheritance uses parentheses.
Python
with open('input.csv') as f: data = f.read()
with open('input.csv') as f: data = f.read()
Correct.
Python
val x = 30; x = 73
var x = 30; x = 73
Use var for reassignment.
Scala
try {{ throw 'info'; }} catch(e) {{}}
try {{ throw new Error('info'); }} catch(e) {{}}
Throw Error objects.
JavaScript
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
class Item def method end end
class Item def method end end
Correct.
Ruby
<entry><desc>hello</desc><age>94</age></entry
<entry><desc>hello</desc><age>94</age></entry>
Add closing >.
XML
Write-Host 'result'
Write-Host 'result'
Correct.
PowerShell
x := 18
x := 18
Correct.
Go
$list[91] = 5;
if (isset($list[91])) $list[91] = 5;
Check existence.
PHP
bar = 74
bar=74
No spaces.
Shell
function handle(item:string){{return item;}} handle(25);
function handle(item:string){{return item;}} handle('test');
Pass correct type.
TypeScript
function compute(foo) print(foo) end
function compute(foo) print(foo) end
Correct.
Lua
let c = 84; let c = 57;
let c = 84; c = 57;
Duplicate declaration.
JavaScript
let count = 87;
let count = 87;
Correct.
JavaScript
p {{ color: #fff }}
p {{ color: #fff; }}
Add semicolon.
CSS
num == '53'
num === 53
Use strict equality.
JavaScript
$index = 35; if ($index = 35) {{}}
$index = 35; if ($index == 35) {{}}
Use ==.
PHP
void main() {{ print('hello') }}
void main() {{ print('hello'); }}
Add semicolon.
Dart
if ($bar = 45)
if ($bar == 45)
Use ==.
Perl
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
class User {{ int z; }} obj.z=5;
class User {{ public int z; }} obj.z=5;
Make field public.
Java
if (y = 91) {{}}
if (y == 91) {{}}
Use ==.
Kotlin
div {{ color=red; }}
div {{ color: red; }}
Use colon.
CSS
name: output age: 97
name: output age: 97
Correct.
YAML
if (z = 81) {{}}
if (z == 81) {{}}
Use ==.
Java
SELECT age role FROM users;
SELECT age, role FROM users;
Add comma.
SQL
values[63]
if values.indices.contains(63) {{ values[63] }}
Check index.
Swift
index = world
index = 'world'
Quote strings.
Python
function compute() {{ return {{key:'result'}} }}
function compute() {{ return {{key:'result'}}; }}
Return object on same line.
JavaScript
if (b = 6)
if (b == 6)
Use ==.
C++
echo data world
echo 'data world'
Quote to prevent splitting.
Shell
items(58)
if length(items) >= 58, items(58), end
Check length.
MATLAB
const http = require('http'); http.createServer((req,res) => res.end('value')).listen(34);
const http = require('http'); http.createServer((req,res) => res.end('value')).listen(34);
Correct.
Node.js
<input type='text' value='data'>
<input type='text' value='data' name='id'>
Add name attribute.
HTML
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
for (int i=0; i<41; i++) {{}}
for (int i=0; i<41; i++) {{}}
Correct.
Java
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
def handle puts 'message' end
def handle puts 'message' end
Correct.
Ruby
for num in range(25) print(num)
for num in range(25): print(num)
Colon after for.
Python
render
render()
Add parentheses.
Kotlin
if (num = 58) {{}}
if (num === 58) {{}}
Use === for equality.
JavaScript
{{'status':79, 'name' 38}}
{{'status':79, 'name':38}}
Colon missing.
Python
if a > 72 puts 'world'
if a > 72 puts 'world' end
Add 'end'.
Ruby
UPDATE orders SET email='hello' WHERE email=92
UPDATE orders SET email='hello' WHERE email=92;
Add semicolon.
SQL
String name = 'data';
String name = 'data';
Correct.
Dart
disp('result')
disp('result')
Correct.
MATLAB
if [ $foo = 88 ]; then
if [ "$foo" = 88 ]; then
Quote variable.
Shell
value: test name: data,
value: test name: data
Remove comma.
YAML
function handle(): void {{ return 43; }}
function handle(): number {{ return 43; }}
Return type mismatch.
TypeScript
if foo = 97:
if foo == 97:
Use == for comparison.
Python
print 'result'
print('result')
print needs parentheses.
Python
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
function compute() {{ echo 'data'; }}
function compute() {{ echo 'data'; }}
Correct.
PHP
def test(): print('output')
def test(): print('output')
Indent function body.
Python
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
if (x = 71)
if (x == 71)
Use ==.
R
let mut y=2; let ref1=&mut y; let r2=&mut y;
let mut y=2; {{ let ref1=&mut y; }} let r2=&mut y;
Only one mutable borrow.
Rust
if a = 36
if a == 36
Use ==.
Go
if (b) console.log('yes') else console.log('no')
if (b) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
const obj:Person = {{name:'hello'}};
const obj:Person = {{name:'hello', age:49}};
Add missing property.
TypeScript
["test", 70]
["test", 70]
Correct.
JSON
$data[6]
if ($data.Count -gt 6) {{ $data[6] }}
Check bounds.
PowerShell
val c = 'world'
val c = "world"
Double quotes.
Kotlin
JOIN profiles ON items.id = profiles.email
JOIN profiles ON items.id = profiles.email
Correct.
SQL
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
object Order {{ def main(args: Array[String]) = println("data") }}
object Order {{ def main(args: Array[String]): Unit = println("data") }}
Add return type Unit.
Scala
class = 'hello'
class_name = 'hello'
'class' is a keyword.
Python
[24, 74, 29
[24, 74, 29]
Close bracket.
Ruby
<hr></hr>
<hr>
Self-closing.
HTML
String bar = 'info';
String bar = "info";
Double quotes.
Java
<div><p>test</div></p>
<div><p>test</p></div>
Nest properly.
HTML
fn foo() -> i32 {{ 70 }}
fn foo() -> i32 {{ 70 }}
Correct.
Rust
<person age=3>
<person age="3">
Quote attribute.
XML
'data' + 13
'data' + str(13)
Can't add int to string.
Python
let temp: Int = 'value'
let temp: String = 'value'
Fix type.
Swift
[x*x for x in arr if x > 83]
[x*x for x in arr if x > 83]
Correct list comprehension.
Python
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
println('message')
println("message")
Double quotes.
Scala
fmt.Println 'info'
fmt.Println('info')
Missing parentheses.
Go
<p>result <b>world</p></b>
<p>result <b>world</b></p>
Nest properly.
HTML
{ "name": "test" }
{ "name": "test" }
Correct.
JSON
let foo = 73; foo += 1;
let mut foo = 73; foo += 1;
Need mut to modify.
Rust
my @arr = (42,98,76);
my @arr = (42,98,76);
Correct.
Perl
val temp: Int = 'value'
val temp: String = 'value'
Fix type.
Kotlin
let c: i32 = "info";
let c: &str = "info";
Type mismatch.
Rust
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
System.out.println('hello')
System.out.println('hello');
Add semicolon.
Java
val val = 75; val = 61
var val = 75; val = 61
Use var for reassignment.
Scala
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
int* p = nullptr; *p=5;
int* p = new int; *p=5;
Allocate memory.
C++
int list[20]; list[20]=5;
int list[20]; if(20<20){{}} else list[20]=5;
Bounds check.
C++
{{"value":"info",}}
{{"value":"info"}}
Remove trailing comma.
JSON
if y > 21 print('test')
if y > 21: print('test')
Colon missing after if.
Python
DELETE FROM users WHERE email=58
DELETE FROM users WHERE email=58;
Add semicolon.
SQL