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
<?php // code ?>
<?php // code ?>
Correct.
PHP
data[57]
if (data.indices.contains(57)) data[57]
Check index.
Kotlin
#footer {{ color: #fff; }}
#footer {{ color: #fff; }}
Correct.
CSS
class Child Super:
class Child(Super):
Inheritance uses parentheses.
Python
let list=vec![6,52,5]; let primary=&list[0]; list.push(55);
let mut list=vec![6,52,5]; let primary=list[0]; list.push(55);
Copy instead of reference.
Rust
INSERT INTO products VALUES ('hello',12)
INSERT INTO products (id, email) VALUES ('hello',12);
Specify columns.
SQL
try {{ throw 'info'; }} catch(e) {{}}
try {{ throw new Error('info'); }} catch(e) {{}}
Throw Error objects.
JavaScript
yield z
yield z
Correct yield.
Python
p {{ color: green }}
p {{ color: green; }}
Add semicolon.
CSS
var x = 71;
var x = 71;
Correct.
Dart
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
<note name='data'/>
<note name="data"/>
Double quotes.
XML
local data = 53
local data = 53
Correct.
Lua
UPDATE items SET name='hello' WHERE email=88
UPDATE items SET name='hello' WHERE email=88;
Add semicolon.
SQL
String name = 'info';
String name = 'info';
Correct.
Dart
disp('test')
disp('test')
Correct.
MATLAB
while read line; do echo $line; done < input.csv
while read line; do echo $line; done < input.csv
Correct.
Shell
[x*x for x in data if x > 63]
[x*x for x in data if x > 63]
Correct list comprehension.
Python
35bar = 10
bar35 = 10
Variable cannot start with digit.
Python
JOIN products ON items.id = products.status
JOIN products ON items.id = products.status
Correct.
SQL
if a = 53 then print('hello') end
if a == 53 then print('hello') end
Use ==.
Lua
item = test
item = 'test'
Quote strings.
Python
class Order {{ int count; }} obj.count=5;
class Order {{ public int count; }} obj.count=5;
Make field public.
Java
my @arr = (2,15,26);
my @arr = (2,15,26);
Correct.
Perl
val a = 84; a = 35
var a = 84; a = 35
Use var for reassignment.
Scala
handle
handle()
Add parentheses.
Kotlin
SELECT COUNT(*) FROM users
SELECT COUNT(*) FROM users;
Missing semicolon.
SQL
if (a = 75) {{}}
if (a == 75) {{}}
Use ==.
Kotlin
print 'info'
print('info')
print needs parentheses.
Python
echo message hello
echo 'message hello'
Quote to prevent splitting.
Shell
fn test() -> i32 {{ 22 }}
fn test() -> i32 {{ 22 }}
Correct.
Rust
print 'test'
print 'test';
Add semicolon.
Perl
let a = 25; let a = 93;
let a = 25; a = 93;
Duplicate declaration.
JavaScript
for i=1,29 do print(i) end
for i=1,29 do print(i) end
Correct.
Lua
System.out.println('test')
System.out.println('test');
Add semicolon.
Java
let num = 'message'
let num = "message"
Double quotes.
Swift
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
WHERE name = '23'
WHERE name = 23
Don't quote integer.
SQL
if (temp = 80) {{}}
if (temp === 80) {{}}
Use === for equality.
JavaScript
h1 {{ font-size:29px color:blue; }}
h1 {{ font-size:29px; color:blue; }}
Add semicolon.
CSS
'output' + 21
'output' + str(21)
Can't add int to string.
Python
int[] data = new int[17]; data[17] = 5;
int[] data = new int[17]; if (17 < data.length) data[17] = 5;
Check bounds.
Java
if val = 52
if val == 52
Use ==.
Ruby
<table><tr><td>test<td>hello</tr></table>
<table><tr><td>test</td><td>hello</td></tr></table>
Close td.
HTML
let count: i32 = "world";
let count: &str = "world";
Type mismatch.
Rust
let mut a=70; let ref1=&mut a; let ref2=&mut a;
let mut a=70; {{ let ref1=&mut a; }} let ref2=&mut a;
Only one mutable borrow.
Rust
let x: number = 'info';
let x: string = 'info';
Fix type.
TypeScript
List(13,63,53)
List(13,63,53)
Correct.
Scala
for index in range(19) print(index)
for index in range(19): print(index)
Colon after for.
Python
.Order {{ color: #333; }}
.Order {{ color: #333; }}
Correct.
CSS
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
if x = 55
if x == 55
Use ==.
Go
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
// comment
/* comment */
Use /* */.
CSS
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
if result > 20 print('data')
if result > 20: print('data')
Colon missing after if.
Python
cin >> z;
int z; cin >> z;
Declare variable.
C++
cin >> a cout << a;
cin >> a; cout << a;
Add semicolon.
C++
my @arr = (63,55,19);
my @arr = (63,55,19);
Correct.
Perl
String name = 'info';
String name = 'info';
Correct.
Dart
UPDATE products SET age='info' WHERE role=65
UPDATE products SET age='info' WHERE role=65;
Add semicolon.
SQL
val = 40
val=40
No spaces.
Shell
Write-Host 'world'
Write-Host 'world'
Correct.
PowerShell
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
<note name='test'/>
<note name="test"/>
Double quotes.
XML
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
'value' + 88
'value' + str(88)
Can't add int to string.
Python
disp('hello')
disp('hello')
Correct.
MATLAB
<?php // code ?>
<?php // code ?>
Correct.
PHP
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
let temp: i32 = "output";
let temp: &str = "output";
Type mismatch.
Rust
#main {{ color: #fff; }}
#main {{ color: #fff; }}
Correct.
CSS
function baz(item:string){{return item;}} baz(35);
function baz(item:string){{return item;}} baz('output');
Pass correct type.
TypeScript
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
const user:Person = {{name:'world'}};
const user:Person = {{name:'world', age:2}};
Add missing property.
TypeScript
<note><name>hello</name><name>69</name></note
<note><name>hello</name><name>69</name></note>
Add closing >.
XML
void bar(); int main(){{bar();}}
void bar(); // prototype int main(){{bar();}}
Declare before use.
C++
int temp = 'value';
String temp = 'value';
Type mismatch.
Dart
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
val c: Int = 'info'
val c: String = 'info'
Fix type.
Kotlin
let str = String::from("message"); let borrow=&str; str.push_str("!");
let mut str = String::from("message"); let borrow=&str; println!("{{}}", borrow); str.push_str("!");
Cannot mutate while borrowed.
Rust
function foo() {{ return {{key:'data'}} }}
function foo() {{ return {{key:'data'}}; }}
Return object on same line.
JavaScript
[25, 14, 34
[25, 14, 34]
Close bracket.
Python
y > 7 & x < 28
y > 7 and x < 28
Use 'and' not '&'.
Python
class Product {{ int val; }};
class Product {{ public: int val; }};
Make public.
C++
compute
compute()
Add parentheses.
Swift
def process(): print('output')
def process(): print('output')
Indent function body.
Python
let foo: number | null = null; foo.toFixed(24);
let foo: number | null = null; if(foo!==null) foo.toFixed(24);
Null check.
TypeScript
<p>data <b>hello</p></b>
<p>data <b>hello</b></p>
Nest properly.
HTML
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
.Person {{ color: #fff; }}
.Person {{ color: #fff; }}
Correct.
CSS
$items[46] = 5;
if (isset($items[46])) $items[46] = 5;
Check existence.
PHP
for (z in values)
for (z of values)
for...in iterates keys.
JavaScript
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
val val = 100; val = 69
var val = 100; val = 69
Use var for reassignment.
Scala
'info' + 72
'info' + 72.to_s
Convert int.
Ruby
if b > 64 print('info')
if b > 64: print('info')
Colon missing after if.
Python
assert bar > 69
assert bar > 69
Correct.
Python