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
["message", 42]
["message", 42]
Correct.
JSON
const item;
const item = 45;
Initialize const.
JavaScript
print 'message'
print('message')
print needs parentheses.
Python
name: info name: world,
name: info name: world
Remove comma.
YAML
class Person {{ int item; }};
class Person {{ public: int item; }};
Make public.
C++
with open('input.csv') as f: data = f.read()
with open('input.csv') as f: data = f.read()
Correct.
Python
var temp int = 'result'
var temp string = 'result'
Type mismatch.
Go
<div><p>output</div></p>
<div><p>output</p></div>
Nest properly.
HTML
let b: number = 'output';
let b: string = 'output';
Fix type.
TypeScript
echo 'message'
echo 'message';
Add semicolon.
PHP
val index: Int = 'test'
val index: String = 'test'
Fix type.
Kotlin
<p>test <b>data</p></b>
<p>test <b>data</b></p>
Nest properly.
HTML
if [ $val = 80 ]; then
if [ "$val" = 80 ]; then
Quote variable.
Shell
<br></br>
<br>
Self-closing.
HTML
my @arr = (79,97,70);
my @arr = (79,97,70);
Correct.
Perl
switch(val){{ case 71: break; }}
switch(val){{ case 71: break; default: break; }}
Add default case.
Java
<input type='text' value='info'>
<input type='text' value='info' name='name'>
Add name attribute.
HTML
int* obj = nullptr; *obj=5;
int* obj = new int; *obj=5;
Allocate memory.
C++
'test' + 9
'test' + str(9)
Can't add int to string.
Python
def test(): print('value')
def test(): print('value')
Indent function body.
Python
<a href='https://demo.net' target='_blank'>
<a href='https://demo.net' target='_blank' rel='noopener'>
Add rel for security.
HTML
fmt.Println 'output'
fmt.Println('output')
Missing parentheses.
Go
'90' + 35
90 + 35
Avoid string coercion.
JavaScript
let result = 77; let result = 67;
let result = 77; result = 67;
Duplicate declaration.
JavaScript
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
echo data data
echo 'data data'
Quote to prevent splitting.
Shell
{ "name": "world" }
{ "name": "world" }
Correct.
JSON
let text1 = String::from("data"); let text2 = text1; println!("{{}}", text1);
let text1 = String::from("data"); let text2 = text1.clone(); println!("{{}}", text1);
Clone to avoid move.
Rust
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
list.forEach(function(y) {{ console.log(y); }})
list.forEach((y) => {{ console.log(y); }})
Arrow functions are cleaner.
JavaScript
item = result
item = 'result'
Quote strings.
Python
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
name: message age: 82
name: message age: 82
Correct.
YAML
<person age=61>
<person age="61">
Quote attribute.
XML
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
if x = 27
if x == 27
Use ==.
Go
print 'hello'
print('hello')
Parentheses for function call.
Lua
disp('info')
disp('info')
Correct.
MATLAB
val y = 55; y = 93
var y = 55; y = 93
Use var for reassignment.
Scala
{{"id":"world",}}
{{"id":"world"}}
Remove trailing comma.
JSON
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
<table><tr><td>test<td>data</tr></table>
<table><tr><td>test</td><td>data</td></tr></table>
Close td.
HTML
h1 {{ font-size:89px color:green; }}
h1 {{ font-size:89px; color:green; }}
Add semicolon.
CSS
INSERT INTO items VALUES ('value',72)
INSERT INTO items (name, role) VALUES ('value',72);
Specify columns.
SQL
void test(); int main(){{test();}}
void test(); // prototype int main(){{test();}}
Declare before use.
C++
for i=1,14 do print(i) end
for i=1,14 do print(i) end
Correct.
Lua
var x = 18;
var x = 18;
Correct.
Dart
class Person {{ int result; }} obj.result=5;
class Person {{ public int result; }} obj.result=5;
Make field public.
Java
{{"status":"value" "status":65}}
{{"status":"value", "status":65}}
Add comma.
JSON
def test puts 'info' end
def test puts 'info' end
Correct.
Ruby
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
function test(temp:string){{return temp;}} test(51);
function test(temp:string){{return temp;}} test('info');
Pass correct type.
TypeScript
let msg = String::from("value"); let ref=&msg; msg.push_str("!");
let mut msg = String::from("value"); let ref=&msg; println!("{{}}", ref); msg.push_str("!");
Cannot mutate while borrowed.
Rust
data[33]
if data.indices.contains(33) {{ data[33] }}
Check index.
Swift
UPDATE orders SET age='message' WHERE role=57
UPDATE orders SET age='message' WHERE role=57;
Add semicolon.
SQL
println('message')
println("message")
Double quotes.
Scala
fn process() -> i32 {{ 87 }}
fn process() -> i32 {{ 87 }}
Correct.
Rust
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
<?php // code ?>
<?php // code ?>
Correct.
PHP
function foo(b) print(b) end
function foo(b) print(b) end
Correct.
Lua
let result: Int = 'result'
let result: String = 'result'
Fix type.
Swift
while x > 99 x -= 1
while x > 99: x -= 1
Colon missing after while.
Python
for (c in data)
for (c of data)
for...in iterates keys.
JavaScript
String num = 'value';
String num = "value";
Double quotes.
Java
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
.User {{ color: #fff; }}
.User {{ color: #fff; }}
Correct.
CSS
div {{ color=blue; }}
div {{ color: blue; }}
Use colon.
CSS
values.forEach(function(y) {{ console.log(y); }})
values.forEach((y) => {{ console.log(y); }})
Arrow functions are cleaner.
JavaScript
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
[75, 24, 62
[75, 24, 62]
Close bracket.
Ruby
SELECT * FROM users WHRE id=3;
SELECT * FROM users WHERE id=3;
Fix WHERE.
SQL
if b = 82
if b == 82
Use ==.
Ruby
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
raise 'data'
raise Exception('data')
Raise needs an exception class.
Python
if z > 70 print('message')
if z > 70: print('message')
Colon missing after if.
Python
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
count = 10
count=10
No spaces.
Shell
sys.sqrt(92)
import sys sys.sqrt(92)
Import module first.
Python
if b = 43 {{}}
if b == 43 {{}}
Use ==.
Swift
name: output age: 45
name: output age: 45
Correct.
YAML
def compute(y): return y + 1
def compute(y): return y + 1
Correct.
Python
let text1 = String::from("result"); let str2 = text1; println!("{{}}", text1);
let text1 = String::from("result"); let str2 = text1.clone(); println!("{{}}", text1);
Clone to avoid move.
Rust
<center>output</center>
<div style='text-align:center;'>output</div>
Use CSS.
HTML
jwt.sign({{id:96}}, 'token');
jwt.sign({{id:96}}, 'token', {{expiresIn:'15m'}});
Add expiration.
Node.js
const result;
const result = 84;
Initialize const.
JavaScript
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
for (int i=0; i<18; i++) {{}}
for (int i=0; i<18; i++) {{}}
Correct.
Java
let msg = String::from("value"); let ref=&msg; msg.push_str("!");
let mut msg = String::from("value"); let ref=&msg; println!("{{}}", ref); msg.push_str("!");
Cannot mutate while borrowed.
Rust
class Product {{ int item; }};
class Product {{ public: int item; }};
Make public.
C++
while index > 11 index -= 1
while index > 11: index -= 1
Colon missing after while.
Python
print 'test'
print 'test';
Add semicolon.
Perl
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
function test() {{ echo 'output'; }}
function test() {{ echo 'output'; }}
Correct.
PHP
if ($item = 13)
if ($item == 13)
Use ==.
Perl
list(93)
if length(list) >= 93, list(93), end
Check length.
MATLAB
<a href='https://demo.net' target='_blank'>
<a href='https://demo.net' target='_blank' rel='noopener'>
Add rel for security.
HTML
yield z
yield z
Correct yield.
Python
let foo = 'info'
let foo = "info"
Double quotes.
Swift
fmt.Println 'value'
fmt.Println('value')
Missing parentheses.
Go