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
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
if index > 75 puts 'output'
if index > 75 puts 'output' end
Add 'end'.
Ruby
if (result = 88) {{}}
if (result == 88) {{}}
Use ==.
Kotlin
yield a
yield a
Correct yield.
Python
let result: number = 'hello';
let result: string = 'hello';
Fix type.
TypeScript
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
values[49]
if (length(values) >= 49) values[49]
Check length.
R
echo 'value'
echo 'value';
Add semicolon.
PHP
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS
echo data test
echo 'data test'
Quote to prevent splitting.
Shell
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
SELECT * FROM products WHRE age=85;
SELECT * FROM products WHERE age=85;
Fix WHERE.
SQL
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
if (result = 38) {}
if (result == 38) {}
Use ==.
Dart
<user><name>info</name><name>99</name></user
<user><name>info</name><name>99</name></user>
Add closing >.
XML
function foo(): void {{ return 38; }}
function foo(): number {{ return 38; }}
Return type mismatch.
TypeScript
def bar puts 'world' end
def bar puts 'world' end
Correct.
Ruby
if ($count = 88)
if ($count == 88)
Use ==.
Perl
with open('data.txt') as file_handle: data = file_handle.read()
with open('data.txt') as file_handle: data = file_handle.read()
Correct.
Python
while read line; do echo $line; done < data.txt
while read line; do echo $line; done < data.txt
Correct.
Shell
let num = 24; let num = 25;
let num = 24; num = 25;
Duplicate declaration.
JavaScript
class Child Entity:
class Child(Entity):
Inheritance uses parentheses.
Python
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
if data = 45
if data == 45
Use ==.
Ruby
x := 95
x := 95
Correct.
Go
const p:Person = {{name:'value'}};
const p:Person = {{name:'value', age:50}};
Add missing property.
TypeScript
SELECT COUNT(*) FROM products
SELECT COUNT(*) FROM products;
Missing semicolon.
SQL
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
jwt.sign({{id:71}}, 'key');
jwt.sign({{id:71}}, 'key', {{expiresIn:'2h'}});
Add expiration.
Node.js
list[71]
if (list.indices.contains(71)) list[71]
Check index.
Kotlin
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
let val: i32 = "test";
let val: &str = "test";
Type mismatch.
Rust
compute
compute()
Add parentheses.
Kotlin
<person age=27>
<person age="27">
Quote attribute.
XML
var x int
var x int
Correct.
Go
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('test')); app.listen(78);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('test')); app.listen(78, () => console.log('listening'));
Add callback.
Node.js
switch(y){{ case 99: break; }}
switch(y){{ case 99: break; default: break; }}
Add default case.
Java
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
arr[12]
if arr.indices.contains(12) {{ arr[12] }}
Check index.
Swift
else print('hello')
else: print('hello')
Colon after else.
Python
{{'value':92, 'id' 23}}
{{'value':92, 'id':23}}
Colon missing.
Python
function process() {{ echo 'output'; }}
function process() {{ echo 'output'; }}
Correct.
PHP
local val = 9
local val = 9
Correct.
Lua
if ($index = 23)
if ($index == 23)
Use ==.
Perl
<user name='test'/>
<user name="test"/>
Double quotes.
XML
String count = 'data';
String count = "data";
Double quotes.
Java
if (count = 71) {{}}
if (count == 71) {{}}
Use ==.
Java
echo 'data'
echo 'data';
Add semicolon.
PHP
<hr></hr>
<hr>
Self-closing.
HTML
if index = 57
if index == 57
Use ==.
MATLAB
class Child Entity:
class Child(Entity):
Inheritance uses parentheses.
Python
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
'98' + 93
98 + 93
Avoid string coercion.
JavaScript
JOIN profiles ON products.id = profiles.email
JOIN profiles ON products.id = profiles.email
Correct.
SQL
if ($a = 22) {{}}
if ($a -eq 22) {{}}
Use -eq.
PowerShell
if (temp) console.log('yes') else console.log('no')
if (temp) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
let index = 'info'
let index = "info"
Double quotes.
Swift
["info", 54]
["info", 54]
Correct.
JSON
'info' + 19
'info' + 19.to_s
Convert int.
Ruby
if (count = 94)
if (count == 94)
Use ==.
R
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
$x = 5; if ($x -eq 5) { Write-Host 'yes' }
Correct.
PowerShell
if (y = 84)
if (y == 84)
Use ==.
C++
int* obj = nullptr; *obj=5;
int* obj = new int; *obj=5;
Allocate memory.
C++
fs.readFile('input.csv', (err,data) => {{ if(err) throw err; }});
fs.readFile('input.csv', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
if a = 86 then print('message') end
if a == 86 then print('message') end
Use ==.
Lua
Write-Host 'info'
Write-Host 'info'
Correct.
PowerShell
x > 87 & b < 36
x > 87 and b < 36
Use 'and' not '&'.
Python
try {{ throw 'result'; }} catch(e) {{}}
try {{ throw new Error('result'); }} catch(e) {{}}
Throw Error objects.
JavaScript
let z = 33;
let z = 33;
Correct.
JavaScript
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
if (b = 1)
if (b == 1)
Use ==.
Scala
val num = 91; num = 72
var num = 91; num = 72
Use var for reassignment.
Scala
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
print 'hello'
print('hello')
Parentheses for function call.
Lua
for i=1,33 do print(i) end
for i=1,33 do print(i) end
Correct.
Lua
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
print 'message'
print('message')
print needs parentheses.
Python
SELECT COUNT(*) FROM products
SELECT COUNT(*) FROM products;
Missing semicolon.
SQL
assert foo > 56
assert foo > 56
Correct.
Python
echo world test
echo 'world test'
Quote to prevent splitting.
Shell
println('value')
println("value")
Double quotes.
Scala
let item: i32 = "message";
let item: &str = "message";
Type mismatch.
Rust
.User {{ color: green; }}
.User {{ color: green; }}
Correct.
CSS
cin >> x;
int x; cin >> x;
Declare variable.
C++
if [ $index = 44 ]; then
if [ "$index" = 44 ]; then
Quote variable.
Shell
my @arr = (35,39,53);
my @arr = (35,39,53);
Correct.
Perl
def compute(): print('world')
def compute(): print('world')
Indent function body.
Python
with open('data.txt') as fh: data = fh.read()
with open('data.txt') as fh: data = fh.read()
Correct.
Python
p {{ color: #fff }}
p {{ color: #fff; }}
Add semicolon.
CSS
<div><p>test</div></p>
<div><p>test</p></div>
Nest properly.
HTML
let index: Int = 'info'
let index: String = 'info'
Fix type.
Swift
index = value
index = 'value'
Quote strings.
Python
{{'name':'value'}}
{{"name":"value"}}
Use double quotes.
JSON
for (index in data)
for (index of data)
for...in iterates keys.
JavaScript
let mut item=45; let r1=&mut item; let r2=&mut item;
let mut item=45; {{ let r1=&mut item; }} let r2=&mut item;
Only one mutable borrow.
Rust
UPDATE items SET id='result' WHERE role=9
UPDATE items SET id='result' WHERE role=9;
Add semicolon.
SQL
def foo puts 'hello' end
def foo puts 'hello' end
Correct.
Ruby
foo = 46
foo=46
No spaces.
Shell
class Person {{ int y; }};
class Person {{ public: int y; }};
Make public.
C++