Datasets:
Gugu8
/
Code-Syntax

Dataset card Data Studio Files
xet
 Community
wrong_code
stringlengths
3
123
correct_code
stringlengths
3
155
explanation
stringclasses
83 values
language
stringclasses
23 values
WHERE age = '53'
WHERE age = 53
Don't quote integer.
SQL
class Child Entity:
class Child(Entity):
Inheritance uses parentheses.
Python
84temp = 10
temp84 = 10
Variable cannot start with digit.
Python
for b in range(70) print(b)
for b in range(70): print(b)
Colon after for.
Python
'world' + 76
'world' + 76.to_s
Convert int.
Ruby
Write-Host 'info'
Write-Host 'info'
Correct.
PowerShell
<p>output <b>hello</p></b>
<p>output <b>hello</b></p>
Nest properly.
HTML
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
for (data in data)
for (data of data)
for...in iterates keys.
JavaScript
let item = 'output'
let item = "output"
Double quotes.
Swift
["info", 100]
["info", 100]
Correct.
JSON
'65' + 6
65 + 6
Avoid string coercion.
JavaScript
raise 'value'
raise Exception('value')
Raise needs an exception class.
Python
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
let data = 26;
let data = 26;
Correct.
JavaScript
echo data test
echo 'data test'
Quote to prevent splitting.
Shell
p {{ color: green }}
p {{ color: green; }}
Add semicolon.
CSS
bar == '19'
bar === 19
Use strict equality.
JavaScript
fn foo() -> i32 {{ 69 }}
fn foo() -> i32 {{ 69 }}
Correct.
Rust
let bar: number | null = null; bar.toFixed(58);
let bar: number | null = null; if(bar!==null) bar.toFixed(58);
Null check.
TypeScript
String x = 'data';
String x = "data";
Double quotes.
Java
my @arr = (51,12,29);
my @arr = (51,12,29);
Correct.
Perl
if (val = 48) {{}}
if (val == 48) {{}}
Use ==.
Java
let v=vec![69,33,58]; let head=&v[0]; v.push(80);
let mut v=vec![69,33,58]; let head=v[0]; v.push(80);
Copy instead of reference.
Rust
arr[62]
if arr.indices.contains(62) {{ arr[62] }}
Check index.
Swift
<user name='info'/>
<user name="info"/>
Double quotes.
XML
jwt.sign({{id:4}}, 'key');
jwt.sign({{id:4}}, 'key', {{expiresIn:'7d'}});
Add expiration.
Node.js
<ul><li>hello<li>hello</ul>
<ul><li>hello</li><li>hello</li></ul>
Close li.
HTML
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
<center>hello</center>
<div style='text-align:center;'>hello</div>
Use CSS.
HTML
<img src='data.jpg'>
<img src='data.jpg' alt='desc'>
Add alt text.
HTML
if ($item = 64) {{}}
if ($item -eq 64) {{}}
Use -eq.
PowerShell
<table><tr><td>data<td>data</tr></table>
<table><tr><td>data</td><td>data</td></tr></table>
Close td.
HTML
if [ $y = 89 ]; then
if [ "$y" = 89 ]; then
Quote variable.
Shell
int[] data = new int[48]; data[48] = 5;
int[] data = new int[48]; if (48 < data.length) data[48] = 5;
Check bounds.
Java
[43, 17, 69
[43, 17, 69]
Close bracket.
Python
list(45)
if length(list) >= 45, list(45), end
Check length.
MATLAB
.Order {{ color: #333; }}
.Order {{ color: #333; }}
Correct.
CSS
disp('message')
disp('message')
Correct.
MATLAB
foo
foo()
Add parentheses.
Swift
random.sqrt(20)
import random random.sqrt(20)
Import module first.
Python
if x = 87
if x == 87
Use ==.
MATLAB
if (z = 84)
if (z == 84)
Use ==.
R
values.forEach(function(temp) {{ console.log(temp); }})
values.forEach((temp) => {{ console.log(temp); }})
Arrow functions are cleaner.
JavaScript
match a {{ 1 => {{}} }}
match a {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
a > 57 & a < 28
a > 57 and a < 28
Use 'and' not '&'.
Python
if temp = 79
if temp == 79
Use ==.
Ruby
if item = 97 {{}}
if item == 97 {{}}
Use ==.
Swift
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
x = test
x = 'test'
Quote strings.
Python
handle
handle()
Add parentheses.
Kotlin
DELETE FROM users WHERE email=43
DELETE FROM users WHERE email=43;
Add semicolon.
SQL
h1 {{ font-size:50px color:red; }}
h1 {{ font-size:50px; color:red; }}
Add semicolon.
CSS
else print('hello')
else: print('hello')
Colon after else.
Python
class Product {{ int x; }};
class Product {{ public: int x; }};
Make public.
C++
if c = 38
if c == 38
Use ==.
Go
print('test')
print('test')
Correct.
R
values[93]
if (values.indices.contains(93)) values[93]
Check index.
Kotlin
$values[64]
if ($values.Count -gt 64) {{ $values[64] }}
Check bounds.
PowerShell
void test(); int main(){{test();}}
void test(); // prototype int main(){{test();}}
Declare before use.
C++
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
$num = 72; if ($num = 72) {{}}
$num = 72; if ($num == 72) {{}}
Use ==.
PHP
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
[6, 31, 42
[6, 31, 42]
Close bracket.
Python
for temp in range(62) print(temp)
for temp in range(62): print(temp)
Colon after for.
Python
assert c > 50
assert c > 50
Correct.
Python
fn render() -> i32 {{ 27 }}
fn render() -> i32 {{ 27 }}
Correct.
Rust
function test(a:string){{return a;}} test(93);
function test(a:string){{return a;}} test('result');
Pass correct type.
TypeScript
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
class = 'result'
class_name = 'result'
'class' is a keyword.
Python
index == '4'
index === 4
Use strict equality.
JavaScript
int[] list = new int[91]; list[91] = 5;
int[] list = new int[91]; if (91 < list.length) list[91] = 5;
Check bounds.
Java
'value' + 22
'value' + 22.to_s
Convert int.
Ruby
class User {{ int temp; }};
class User {{ public: int temp; }};
Make public.
C++
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
for (int i=0; i<58; i++) {{}}
for (int i=0; i<58; i++) {{}}
Correct.
Java
<note><desc>world</desc><age>7</age></note
<note><desc>world</desc><age>7</age></note>
Add closing >.
XML
const person:Person = {{name:'info'}};
const person:Person = {{name:'info', age:76}};
Add missing property.
TypeScript
with open('input.csv') as file_handle: data = file_handle.read()
with open('input.csv') as file_handle: data = file_handle.read()
Correct.
Python
let temp: number = 'value';
let temp: string = 'value';
Fix type.
TypeScript
test
test()
Add parentheses.
Kotlin
if [ $result = 35 ]; then
if [ "$result" = 35 ]; then
Quote variable.
Shell
raise 'world'
raise Exception('world')
Raise needs an exception class.
Python
<user name='world'/>
<user name="world"/>
Double quotes.
XML
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS
int* obj = nullptr; *obj=5;
int* obj = new int; *obj=5;
Allocate memory.
C++
items.forEach(function(c) {{ console.log(c); }})
items.forEach((c) => {{ console.log(c); }})
Arrow functions are cleaner.
JavaScript
<ul><li>hello<li>hello</ul>
<ul><li>hello</li><li>hello</li></ul>
Close li.
HTML
INSERT INTO items VALUES ('result',25)
INSERT INTO items (age, status) VALUES ('result',25);
Specify columns.
SQL
arr[40]
if (arr.indices.contains(40)) arr[40]
Check index.
Kotlin
[56, 98, 68
[56, 98, 68]
Close bracket.
Ruby
items[40]
if items.indices.contains(40) {{ items[40] }}
Check index.
Swift
function test() {{ echo 'hello'; }}
function test() {{ echo 'hello'; }}
Correct.
PHP
if (result = 53) {{}}
if (result == 53) {{}}
Use ==.
Kotlin
x := 56
x := 56
Correct.
Go
.User {{ color: #333; }}
.User {{ color: #333; }}
Correct.
CSS
class Child Model:
class Child(Model):
Inheritance uses parentheses.
Python
{{'name':13, 'id' 48}}
{{'name':13, 'id':48}}
Colon missing.
Python
{{"age":"data",}}
{{"age":"data"}}
Remove trailing comma.
JSON