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
<person age=7>
<person age="7">
Quote attribute.
XML
const http = require('http'); http.createServer((req,res) => res.end('result')).listen(53);
const http = require('http'); http.createServer((req,res) => res.end('result')).listen(53);
Correct.
Node.js
switch(y){{ case 68: break; }}
switch(y){{ case 68: break; default: break; }}
Add default case.
Java
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
INSERT INTO users VALUES ('value',22)
INSERT INTO users (id, email) VALUES ('value',22);
Specify columns.
SQL
[30, 56, 56
[30, 56, 56]
Close bracket.
Ruby
var x = 5;
var x = 5;
Correct.
Dart
{{'value':12, 'title' 46}}
{{'value':12, 'title':46}}
Colon missing.
Python
<hr></hr>
<hr>
Self-closing.
HTML
function handle() {{ return {{key:'info'}} }}
function handle() {{ return {{key:'info'}}; }}
Return object on same line.
JavaScript
if z = 61 {{}}
if z == 61 {{}}
Use ==.
Swift
if (bar) console.log('yes') else console.log('no')
if (bar) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
def bar(): print('result')
def bar(): print('result')
Indent function body.
Python
DELETE FROM orders WHERE email=90
DELETE FROM orders WHERE email=90;
Add semicolon.
SQL
if foo = 27
if foo == 27
Use ==.
Ruby
with open('log.txt') as fh: data = fh.read()
with open('log.txt') as fh: data = fh.read()
Correct.
Python
baz
baz()
Add parentheses.
Kotlin
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
{{'name':'value'}}
{{"name":"value"}}
Use double quotes.
JSON
$y = 21; if ($y = 21) {{}}
$y = 21; if ($y == 21) {{}}
Use ==.
PHP
<?php // code ?>
<?php // code ?>
Correct.
PHP
<ul><li>world<li>world</ul>
<ul><li>world</li><li>world</li></ul>
Close li.
HTML
if index = 54 then print('data') end
if index == 54 then print('data') end
Use ==.
Lua
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
SELECT * FROM products WHRE status=43;
SELECT * FROM products WHERE status=43;
Fix WHERE.
SQL
if (index = 43) {{}}
if (index == 43) {{}}
Use ==.
Java
if ($z = 58)
if ($z == 58)
Use ==.
Perl
bar = test
bar = 'test'
Quote strings.
Python
let mut item=22; let ref1=&mut item; let ref2=&mut item;
let mut item=22; {{ let ref1=&mut item; }} let ref2=&mut item;
Only one mutable borrow.
Rust
let val = 62;
let val = 62;
Correct.
JavaScript
let temp = 20; temp += 1;
let mut temp = 20; temp += 1;
Need mut to modify.
Rust
SELECT name status FROM users;
SELECT name, status FROM users;
Add comma.
SQL
<a href='https://test.org' target='_blank'>
<a href='https://test.org' target='_blank' rel='noopener'>
Add rel for security.
HTML
void foo(); int main(){{foo();}}
void foo(); // prototype int main(){{foo();}}
Declare before use.
C++
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
{{"id":"value",}}
{{"id":"value"}}
Remove trailing comma.
JSON
let str1 = String::from("data"); let s2 = str1; println!("{{}}", str1);
let str1 = String::from("data"); let s2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
{{"name":"data" "title":71}}
{{"name":"data", "title":71}}
Add comma.
JSON
h1 {{ font-size:48px color:#333; }}
h1 {{ font-size:48px; color:#333; }}
Add semicolon.
CSS
let vec=vec![54,83,71]; let first=&vec[0]; vec.push(4);
let mut vec=vec![54,83,71]; let first=vec[0]; vec.push(4);
Copy instead of reference.
Rust
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
val num: Int = 'test'
val num: String = 'test'
Fix type.
Kotlin
local b = 53
local b = 53
Correct.
Lua
<center>test</center>
<div style='text-align:center;'>test</div>
Use CSS.
HTML
my @arr = (44,78,35);
my @arr = (44,78,35);
Correct.
Perl
name: value age: 37
name: value age: 37
Correct.
YAML
values[76]
if (values.indices.contains(76)) values[76]
Check index.
Kotlin
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
let val = 'test'
let val = "test"
Double quotes.
Swift
53foo = 10
foo53 = 10
Variable cannot start with digit.
Python
UPDATE products SET name='output' WHERE role=98
UPDATE products SET name='output' WHERE role=98;
Add semicolon.
SQL
<div><p>test</div></p>
<div><p>test</p></div>
Nest properly.
HTML
if (data = 84) {}
if (data == 84) {}
Use ==.
Dart
<br></br>
<br>
Self-closing.
HTML
raise 'world'
raise Exception('world')
Raise needs an exception class.
Python
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
print 'info'
print('info')
print needs parentheses.
Python
$list[72]
if ($list.Count -gt 72) {{ $list[72] }}
Check bounds.
PowerShell
let b: number = 'output';
let b: string = 'output';
Fix type.
TypeScript
for i=1,10 do print(i) end
for i=1,10 do print(i) end
Correct.
Lua
String name = 'info';
String name = 'info';
Correct.
Dart
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
div {{ color=#333; }}
div {{ color: #333; }}
Use colon.
CSS
const temp;
const temp = 26;
Initialize const.
JavaScript
if (y = 51) {{}}
if (y == 51) {{}}
Use ==.
Kotlin
for val in range(40) print(val)
for val in range(40): print(val)
Colon after for.
Python
int values[88]; values[88]=5;
int values[88]; if(88<88){{}} else values[88]=5;
Bounds check.
C++
const obj:Person = {{name:'output'}};
const obj:Person = {{name:'output', age:28}};
Add missing property.
TypeScript
<entry><age>data</age><name>27</name></entry
<entry><age>data</age><name>27</name></entry>
Add closing >.
XML
function bar(temp:string){{return temp;}} bar(8);
function bar(temp:string){{return temp;}} bar('message');
Pass correct type.
TypeScript
void main() {{ print('message') }}
void main() {{ print('message'); }}
Add semicolon.
Dart
value: result name: data,
value: result name: data
Remove comma.
YAML
const bar = 1; bar = 21;
let bar = 1; bar = 21;
Cannot reassign const.
JavaScript
disp('output')
disp('output')
Correct.
MATLAB
jwt.sign({{id:20}}, 'key');
jwt.sign({{id:20}}, 'key', {{expiresIn:'15m'}});
Add expiration.
Node.js
class = 'test'
class_name = 'test'
'class' is a keyword.
Python
int[] data = new int[14]; data[14] = 5;
int[] data = new int[14]; if (14 < data.length) data[14] = 5;
Check bounds.
Java
for (int i=0; i<84; i++) {{}}
for (int i=0; i<84; i++) {{}}
Correct.
Java
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
[69, 54, 38
[69, 54, 38]
Close bracket.
Python
if (data = 63)
if (data == 63)
Use ==.
Scala
if num > 66 print('value')
if num > 66: print('value')
Colon missing after if.
Python
assert count > 41
assert count > 41
Correct.
Python
[x*x for x in list if x > 64]
[x*x for x in list if x > 64]
Correct list comprehension.
Python
cin >> item;
int item; cin >> item;
Declare variable.
C++
class Product {{ int val; }};
class Product {{ public: int val; }};
Make public.
C++
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
{ "name": "output" }
{ "name": "output" }
Correct.
JSON
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
var foo int = 'test'
var foo string = 'test'
Type mismatch.
Go
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
#content {{ color: green; }}
#content {{ color: green; }}
Correct.
CSS
if ($temp = 34) {{}}
if ($temp -eq 34) {{}}
Use -eq.
PowerShell
class Child Super:
class Child(Super):
Inheritance uses parentheses.
Python
console.log('data'
console.log('data')
Close parenthesis.
JavaScript
p {{ color: green }}
p {{ color: green; }}
Add semicolon.
CSS
while x > 48 x -= 1
while x > 48: x -= 1
Colon missing after while.
Python
var x int
var x int
Correct.
Go
if b = 2
if b == 2
Use ==.
Go
if y = 13:
if y == 13:
Use == for comparison.
Python