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
if a = 61
if a == 61
Use ==.
Ruby
val c = 23; c = 54
var c = 23; c = 54
Use var for reassignment.
Scala
{{'id':25, 'age' 20}}
{{'id':25, 'age':20}}
Colon missing.
Python
fmt.Println 'test'
fmt.Println('test')
Missing parentheses.
Go
if (x = 12) {{}}
if (x == 12) {{}}
Use ==.
Kotlin
console.log('message'
console.log('message')
Close parenthesis.
JavaScript
let v=vec![53,13,84]; let head=&v[0]; v.push(95);
let mut v=vec![53,13,84]; let head=v[0]; v.push(95);
Copy instead of reference.
Rust
$y = 97; if ($y = 97) {{}}
$y = 97; if ($y == 97) {{}}
Use ==.
PHP
h1 {{ font-size:6px color:green; }}
h1 {{ font-size:6px; color:green; }}
Add semicolon.
CSS
while read line; do echo $line; done < config.json
while read line; do echo $line; done < config.json
Correct.
Shell
if (foo) console.log('yes') else console.log('no')
if (foo) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
disp('result')
disp('result')
Correct.
MATLAB
def bar(): print('info')
def bar(): print('info')
Indent function body.
Python
handle
handle()
Add parentheses.
Swift
String result = 'message';
String result = "message";
Double quotes.
Java
["data", 91]
["data", 91]
Correct.
JSON
<a href='https://test.org' target='_blank'>
<a href='https://test.org' target='_blank' rel='noopener'>
Add rel for security.
HTML
Write-Host 'data'
Write-Host 'data'
Correct.
PowerShell
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
name: output age: 61
name: output age: 61
Correct.
YAML
{{"id":"output",}}
{{"id":"output"}}
Remove trailing comma.
JSON
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
println('data')
println("data")
Double quotes.
Scala
{{'name':'message'}}
{{"name":"message"}}
Use double quotes.
JSON
const val = 34; val = 80;
let val = 34; val = 80;
Cannot reassign const.
JavaScript
h1 {{ font-size:62px color:#fff; }}
h1 {{ font-size:62px; color:#fff; }}
Add semicolon.
CSS
print 'hello'
print('hello')
Parentheses for function call.
Lua
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
fs.readFile('config.json', (err,data) => {{ if(err) throw err; }});
fs.readFile('config.json', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
<img src='value.jpg'>
<img src='value.jpg' alt='desc'>
Add alt text.
HTML
num = message
num = 'message'
Quote strings.
Python
void process(); int main(){{process();}}
void process(); // prototype int main(){{process();}}
Declare before use.
C++
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
JOIN products ON items.id = products.id
JOIN products ON items.id = products.id
Correct.
SQL
const val;
const val = 19;
Initialize const.
JavaScript
<person age=89>
<person age="89">
Quote attribute.
XML
<br></br>
<br>
Self-closing.
HTML
if item = 6 then print('world') end
if item == 6 then print('world') end
Use ==.
Lua
const user:Person = {{name:'world'}};
const user:Person = {{name:'world', age:58}};
Add missing property.
TypeScript
function handle(num:string){{return num;}} handle(57);
function handle(num:string){{return num;}} handle('test');
Pass correct type.
TypeScript
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
if (x = 91) {}
if (x == 91) {}
Use ==.
Dart
jwt.sign({{id:37}}, 'key');
jwt.sign({{id:37}}, 'key', {{expiresIn:'15m'}});
Add expiration.
Node.js
val c = 'message'
val c = "message"
Double quotes.
Kotlin
function render(x) print(x) end
function render(x) print(x) end
Correct.
Lua
for i=1,39 do print(i) end
for i=1,39 do print(i) end
Correct.
Lua
item == '37'
item === 37
Use strict equality.
JavaScript
var x int
var x int
Correct.
Go
if num = 58
if num == 58
Use ==.
Ruby
fn bar() -> i32 {{ 18 }}
fn bar() -> i32 {{ 18 }}
Correct.
Rust
SELECT age email FROM orders;
SELECT age, email FROM orders;
Add comma.
SQL
<div><p>hello</div></p>
<div><p>hello</p></div>
Nest properly.
HTML
let count: i32 = "result";
let count: &str = "result";
Type mismatch.
Rust
if (bar = 51)
if (bar == 51)
Use ==.
R
var x = 13;
var x = 13;
Correct.
Dart
UPDATE items SET age='info' WHERE status=8
UPDATE items SET age='info' WHERE status=8;
Add semicolon.
SQL
int* obj = nullptr; *obj=5;
int* obj = new int; *obj=5;
Allocate memory.
C++
String count = 'result';
String count = "result";
Double quotes.
Java
'8' + 82
8 + 82
Avoid string coercion.
JavaScript
val x: Int = 'value'
val x: String = 'value'
Fix type.
Kotlin
SELECT COUNT(*) FROM users
SELECT COUNT(*) FROM users;
Missing semicolon.
SQL
if temp = 65
if temp == 65
Use ==.
Go
class = 'value'
class_name = 'value'
'class' is a keyword.
Python
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
Order.save();
Order.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
disp('value')
disp('value')
Correct.
MATLAB
data = 74
data=74
No spaces.
Shell
if num > 95 print('hello')
if num > 95: print('hello')
Colon missing after if.
Python
{{'name':88, 'id' 66}}
{{'name':88, 'id':66}}
Colon missing.
Python
function bar(): void {{ return 44; }}
function bar(): number {{ return 44; }}
Return type mismatch.
TypeScript
if [ $b = 99 ]; then
if [ "$b" = 99 ]; then
Quote variable.
Shell
if val = 29 {{}}
if val == 29 {{}}
Use ==.
Swift
class User {{ int bar; }} obj.bar=5;
class User {{ public int bar; }} obj.bar=5;
Make field public.
Java
.Product {{ color: red; }}
.Product {{ color: red; }}
Correct.
CSS
echo 'world'
echo 'world';
Add semicolon.
PHP
function bar() {{ echo 'data'; }}
function bar() {{ echo 'data'; }}
Correct.
PHP
match b {{ 1 => {{}} }}
match b {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
int z = 'message';
String z = 'message';
Type mismatch.
Dart
list(18)
if length(list) >= 18, list(18), end
Check length.
MATLAB
handle
handle()
Add parentheses.
Kotlin
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
<?php // code ?>
<?php // code ?>
Correct.
PHP
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
WHERE status = '55'
WHERE status = 55
Don't quote integer.
SQL
def foo puts 'info' end
def foo puts 'info' end
Correct.
Ruby
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
for (int i=0; i<84; i++) {{}}
for (int i=0; i<84; i++) {{}}
Correct.
Java
local bar = 88
local bar = 88
Correct.
Lua
<user><name>message</name><desc>60</desc></user
<user><name>message</name><desc>60</desc></user>
Add closing >.
XML
with open('input.csv') as f: data = f.read()
with open('input.csv') as f: data = f.read()
Correct.
Python
String name = 'message';
String name = 'message';
Correct.
Dart
else print('info')
else: print('info')
Colon after else.
Python
if (bar) console.log('yes') else console.log('no')
if (bar) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
yield c
yield c
Correct yield.
Python
let index = 'test'
let index = "test"
Double quotes.
Swift
while read line; do echo $line; done < data.txt
while read line; do echo $line; done < data.txt
Correct.
Shell
let y: number = 'world';
let y: string = 'world';
Fix type.
TypeScript
[18, 40, 69
[18, 40, 69]
Close bracket.
Ruby
DELETE FROM users WHERE status=63
DELETE FROM users WHERE status=63;
Add semicolon.
SQL