Datasets:
Gugu8
/
Code-Syntax-Expanded

Dataset card Data Studio Files
xet
 Community
1
wrong_code
stringlengths
3
123
correct_code
stringlengths
3
155
explanation
stringclasses
101 values
language
stringclasses
26 values
let c = 1; let c = 100;
let c = 1; c = 100;
Duplicate declaration.
JavaScript
<img src='world.jpg'>
<img src='world.jpg' alt='desc'>
Add alt text.
HTML
void main() {{ print('world') }}
void main() {{ print('world'); }}
Add semicolon.
Dart
<div><p>data</div></p>
<div><p>data</p></div>
Nest properly.
HTML
List(24,49,25)
List(24,49,25)
Correct.
Scala
assert index > 2
assert index > 2
Correct.
Python
6num = 10
num6 = 10
Variable cannot start with digit.
Python
age: test id: hello,
age: test id: hello
Remove comma.
YAML
raise 'hello'
raise Exception('hello')
Raise needs an exception class.
Python
if z = 14:
if z == 14:
Use == for comparison.
Python
if data = 30
if data == 30
Use ==.
Go
System.out.println('value')
System.out.println('value');
Add semicolon.
Java
if [ $item = 38 ]; then
if [ "$item" = 38 ]; then
Quote variable.
Shell
val bar: Int = 'info'
val bar: String = 'info'
Fix type.
Kotlin
let item: Int = 'data'
let item: String = 'data'
Fix type.
Swift
<person age=87>
<person age="87">
Quote attribute.
XML
void baz(); int main(){{baz();}}
void baz(); // prototype int main(){{baz();}}
Declare before use.
C++
SELECT COUNT(*) FROM items
SELECT COUNT(*) FROM items;
Missing semicolon.
SQL
while y > 20 y -= 1
while y > 20: y -= 1
Colon missing after while.
Python
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
while read line; do echo $line; done < log.txt
while read line; do echo $line; done < log.txt
Correct.
Shell
with open('config.json') as f: data = f.read()
with open('config.json') as f: data = f.read()
Correct.
Python
String foo = 'output';
String foo = "output";
Double quotes.
Java
x = 24
x=24
No spaces.
Shell
$items[75]
if ($items.Count -gt 75) {{ $items[75] }}
Check bounds.
PowerShell
WHERE email = '24'
WHERE email = 24
Don't quote integer.
SQL
class Product {{ int temp; }} obj.temp=5;
class Product {{ public int temp; }} obj.temp=5;
Make field public.
Java
cin >> data cout << data;
cin >> data; cout << data;
Add semicolon.
C++
compute
compute()
Add parentheses.
Swift
my @arr = (38,25,60);
my @arr = (38,25,60);
Correct.
Perl
fmt.Println 'message'
fmt.Println('message')
Missing parentheses.
Go
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
let v=vec![69,37,53]; let first=&v[0]; v.push(88);
let mut v=vec![69,37,53]; let first=v[0]; v.push(88);
Copy instead of reference.
Rust
cin >> data;
int data; cin >> data;
Declare variable.
C++
int[] arr = new int[84]; arr[84] = 5;
int[] arr = new int[84]; if (84 < arr.length) arr[84] = 5;
Check bounds.
Java
let bar = 'value'
let bar = "value"
Double quotes.
Swift
class = 'world'
class_name = 'world'
'class' is a keyword.
Python
[99, 52, 67
[99, 52, 67]
Close bracket.
Python
println('test')
println("test")
Double quotes.
Scala
<input type='text' value='info'>
<input type='text' value='info' name='age'>
Add name attribute.
HTML
h1 {{ font-size:59px color:red; }}
h1 {{ font-size:59px; color:red; }}
Add semicolon.
CSS
$arr[59] = 5;
if (isset($arr[59])) $arr[59] = 5;
Check existence.
PHP
val c = 'info'
val c = "info"
Double quotes.
Kotlin
print 'hello'
print('hello')
Parentheses for function call.
Lua
int items[5]; items[5]=5;
int items[5]; if(5<5){{}} else items[5]=5;
Bounds check.
C++
UPDATE users SET status='value' WHERE email=99
UPDATE users SET status='value' WHERE email=99;
Add semicolon.
SQL
values[84]
if (values.indices.contains(84)) values[84]
Check index.
Kotlin
'77' + 78
77 + 78
Avoid string coercion.
JavaScript
if (z = 99)
if (z == 99)
Use ==.
R
let str = String::from("world"); let borrow=&str; str.push_str("!");
let mut str = String::from("world"); let borrow=&str; println!("{{}}", borrow); str.push_str("!");
Cannot mutate while borrowed.
Rust
if a > 96 puts 'result'
if a > 96 puts 'result' end
Add 'end'.
Ruby
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
{ "name": "result" }
{ "name": "result" }
Correct.
JSON
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
function baz(): void {{ return 15; }}
function baz(): number {{ return 15; }}
Return type mismatch.
TypeScript
{{"name":"world" "name":62}}
{{"name":"world", "name":62}}
Add comma.
JSON
if a = 30
if a == 30
Use ==.
MATLAB
String name = 'test';
String name = 'test';
Correct.
Dart
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
print('output')
print('output')
Correct.
R
INSERT INTO products VALUES ('hello',70)
INSERT INTO products (age, role) VALUES ('hello',70);
Specify columns.
SQL
<a href='https://test.org' target='_blank'>
<a href='https://test.org' target='_blank' rel='noopener'>
Add rel for security.
HTML
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
class Child Super:
class Child(Super):
Inheritance uses parentheses.
Python
<user name='data'/>
<user name="data"/>
Double quotes.
XML
for i=1,8 do print(i) end
for i=1,8 do print(i) end
Correct.
Lua
if a = 29 {{}}
if a == 29 {{}}
Use ==.
Swift
<br></br>
<br>
Self-closing.
HTML
def handle(): print('test')
def handle(): print('test')
Indent function body.
Python
var x int = 'message'
var x string = 'message'
Type mismatch.
Go
'output' + 69
'output' + 69.to_s
Convert int.
Ruby
try {{ throw 'result'; }} catch(e) {{}}
try {{ throw new Error('result'); }} catch(e) {{}}
Throw Error objects.
JavaScript
if (val = 94)
if (val == 94)
Use ==.
Scala
<person><name>data</name><age>64</age></person
<person><name>data</name><age>64</age></person>
Add closing >.
XML
let str = String::from("data"); let borrow=&str; str.push_str("!");
let mut str = String::from("data"); let borrow=&str; println!("{{}}", borrow); str.push_str("!");
Cannot mutate while borrowed.
Rust
var x = 42;
var x = 42;
Correct.
Dart
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('world')); app.listen(84);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('world')); app.listen(84, () => console.log('listening'));
Add callback.
Node.js
item = info
item = 'info'
Quote strings.
Python
SELECT * FROM users WHRE status=2;
SELECT * FROM users WHERE status=2;
Fix WHERE.
SQL
const http = require('http'); http.createServer((req,res) => res.end('message')).listen(3);
const http = require('http'); http.createServer((req,res) => res.end('message')).listen(3);
Correct.
Node.js
for (result in data)
for (result of data)
for...in iterates keys.
JavaScript
class Product {{ int z; }};
class Product {{ public: int z; }};
Make public.
C++
[x*x for x in items if x > 62]
[x*x for x in items if x > 62]
Correct list comprehension.
Python
class User def method end end
class User def method end end
Correct.
Ruby
<img src='value.jpg'>
<img src='value.jpg' alt='desc'>
Add alt text.
HTML
{{'title':34, 'name' 93}}
{{'title':34, 'name':93}}
Colon missing.
Python
if (z) console.log('yes') else console.log('no')
if (z) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
z == '93'
z === 93
Use strict equality.
JavaScript
if (num = 2) {}
if (num == 2) {}
Use ==.
Dart
if bar = 97
if bar == 97
Use ==.
Go
<input type='text' value='hello'>
<input type='text' value='hello' name='status'>
Add name attribute.
HTML
if y = 43:
if y == 43:
Use == for comparison.
Python
#footer {{ color: #fff; }}
#footer {{ color: #fff; }}
Correct.
CSS
let foo = 49; foo += 1;
let mut foo = 49; foo += 1;
Need mut to modify.
Rust
val a = 18; a = 84
var a = 18; a = 84
Use var for reassignment.
Scala
var result int = 'hello'
var result string = 'hello'
Type mismatch.
Go
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
String name = 'result';
String name = 'result';
Correct.
Dart
function baz() {{ echo 'message'; }}
function baz() {{ echo 'message'; }}
Correct.
PHP