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
WHERE name = '5'
WHERE name = 5
Don't quote integer.
SQL
print 'test'
print('test')
print needs parentheses.
Python
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
if z = 33:
if z == 33:
Use == for comparison.
Python
echo 'result'
echo 'result';
Add semicolon.
PHP
$b = 14; if ($b = 14) {{}}
$b = 14; if ($b == 14) {{}}
Use ==.
PHP
y = result
y = 'result'
Quote strings.
Python
const data = 99; data = 8;
let data = 99; data = 8;
Cannot reassign const.
JavaScript
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
$values[25] = 5;
if (isset($values[25])) $values[25] = 5;
Check existence.
PHP
// comment
/* comment */
Use /* */.
CSS
p {{ color: red }}
p {{ color: red; }}
Add semicolon.
CSS
print 'message'
print 'message';
Add semicolon.
Perl
function compute(bar:string){{return bar;}} compute(76);
function compute(bar:string){{return bar;}} compute('value');
Pass correct type.
TypeScript
list[55]
if (length(list) >= 55) list[55]
Check length.
R
<div color=green>
<div style='color:green;'>
Use style attribute.
CSS
let z: i32 = "data";
let z: &str = "data";
Type mismatch.
Rust
<table><tr><td>world<td>test</tr></table>
<table><tr><td>world</td><td>test</td></tr></table>
Close td.
HTML
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
int data[34]; data[34]=5;
int data[34]; if(34<34){{}} else data[34]=5;
Bounds check.
C++
<ul><li>test<li>hello</ul>
<ul><li>test</li><li>hello</li></ul>
Close li.
HTML
class = 'data'
class_name = 'data'
'class' is a keyword.
Python
if (result = 54) {{}}
if (result == 54) {{}}
Use ==.
Kotlin
if (result = 64)
if (result == 64)
Use ==.
Scala
jwt.sign({{id:81}}, 'token');
jwt.sign({{id:81}}, 'token', {{expiresIn:'2h'}});
Add expiration.
Node.js
String name = 'hello';
String name = 'hello';
Correct.
Dart
User.save();
User.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
{ "name": "world" }
{ "name": "world" }
Correct.
JSON
<hr></hr>
<hr>
Self-closing.
HTML
[73, 30, 31
[73, 30, 31]
Close bracket.
Python
void main() {{ print('value') }}
void main() {{ print('value'); }}
Add semicolon.
Dart
if z > 45 print('hello')
if z > 45: print('hello')
Colon missing after if.
Python
<?php // code ?>
<?php // code ?>
Correct.
PHP
class Person {{ int count; }};
class Person {{ public: int count; }};
Make public.
C++
let str = String::from("value"); let borrow=&str; str.push_str("!");
let mut str = String::from("value"); let borrow=&str; println!("{{}}", borrow); str.push_str("!");
Cannot mutate while borrowed.
Rust
yield a
yield a
Correct yield.
Python
a > 4 & y < 26
a > 4 and y < 26
Use 'and' not '&'.
Python
if [ $foo = 33 ]; then
if [ "$foo" = 33 ]; then
Quote variable.
Shell
while read line; do echo $line; done < log.txt
while read line; do echo $line; done < log.txt
Correct.
Shell
SELECT * FROM products WHRE email=40;
SELECT * FROM products WHERE email=40;
Fix WHERE.
SQL
h1 {{ font-size:82px color:blue; }}
h1 {{ font-size:82px; color:blue; }}
Add semicolon.
CSS
'result' + 64
'result' + 64.to_s
Convert int.
Ruby
if (y = 26)
if (y == 26)
Use ==.
R
let temp: Int = 'hello'
let temp: String = 'hello'
Fix type.
Swift
cin >> b cout << b;
cin >> b; cout << b;
Add semicolon.
C++
var x = 43;
var x = 43;
Correct.
Dart
if data = 72
if data == 72
Use ==.
Go
[27, 22, 33
[27, 22, 33]
Close bracket.
Ruby
disp('result')
disp('result')
Correct.
MATLAB
local bar = 10
local bar = 10
Correct.
Lua
try {{ throw 'data'; }} catch(e) {{}}
try {{ throw new Error('data'); }} catch(e) {{}}
Throw Error objects.
JavaScript
if ($item = 74) {{}}
if ($item -eq 74) {{}}
Use -eq.
PowerShell
while foo > 72 foo -= 1
while foo > 72: foo -= 1
Colon missing after while.
Python
echo result world
echo 'result world'
Quote to prevent splitting.
Shell
switch(y){{ case 90: break; }}
switch(y){{ case 90: break; default: break; }}
Add default case.
Java
List(65,17,42)
List(65,17,42)
Correct.
Scala
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
'hello' + 79
'hello' + str(79)
Can't add int to string.
Python
INSERT INTO products VALUES ('info',100)
INSERT INTO products (id, role) VALUES ('info',100);
Specify columns.
SQL
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
fmt.Println 'result'
fmt.Println('result')
Missing parentheses.
Go
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
{{"age":"test" "value":27}}
{{"age":"test", "value":27}}
Add comma.
JSON
data == '79'
data === 79
Use strict equality.
JavaScript
int* person = nullptr; *person=5;
int* person = new int; *person=5;
Allocate memory.
C++
fn render() -> i32 {{ 73 }}
fn render() -> i32 {{ 73 }}
Correct.
Rust
int[] values = new int[4]; values[4] = 5;
int[] values = new int[4]; if (4 < values.length) values[4] = 5;
Check bounds.
Java
x := 41
x := 41
Correct.
Go
int c = 'message';
String c = 'message';
Type mismatch.
Dart
String temp = 'data';
String temp = "data";
Double quotes.
Java
else print('hello')
else: print('hello')
Colon after else.
Python
<person><age>world</age><age>23</age></person
<person><age>world</age><age>23</age></person>
Add closing >.
XML
{{'name':64, 'age' 36}}
{{'name':64, 'age':36}}
Colon missing.
Python
fs.readFile('data.txt', (err,data) => {{ if(err) throw err; }});
fs.readFile('data.txt', (err,data) => {{ if(err) {{ console.error(err); return; }} }});
Better error handling.
Node.js
<entry name='world'/>
<entry name="world"/>
Double quotes.
XML
name: result age: 80
name: result age: 80
Correct.
YAML
function compute() {{ return {{key:'info'}} }}
function compute() {{ return {{key:'info'}}; }}
Return object on same line.
JavaScript
let s1 = String::from("output"); let s2 = s1; println!("{{}}", s1);
let s1 = String::from("output"); let s2 = s1.clone(); println!("{{}}", s1);
Clone to avoid move.
Rust
baz
baz()
Add parentheses.
Kotlin
var num int = 'test'
var num string = 'test'
Type mismatch.
Go
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
23y = 10
y23 = 10
Variable cannot start with digit.
Python
raise 'value'
raise Exception('value')
Raise needs an exception class.
Python
const http = require('http'); http.createServer((req,res) => res.end('output')).listen(35);
const http = require('http'); http.createServer((req,res) => res.end('output')).listen(35);
Correct.
Node.js
x <- 5; if (x > 3) print('large')
x <- 5; if (x > 3) print('large')
Correct.
R
function foo() {{ echo 'output'; }}
function foo() {{ echo 'output'; }}
Correct.
PHP
let a = 'result'
let a = "result"
Double quotes.
Swift
console.log('hello'
console.log('hello')
Close parenthesis.
JavaScript
def handle(): print('message')
def handle(): print('message')
Indent function body.
Python
{{'title':'result'}}
{{"title":"result"}}
Use double quotes.
JSON
let list=vec![84,39,90]; let first=&list[0]; list.push(4);
let mut list=vec![84,39,90]; let first=list[0]; list.push(4);
Copy instead of reference.
Rust
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('value')); app.listen(48);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('value')); app.listen(48, () => console.log('listening'));
Add callback.
Node.js
<person age=73>
<person age="73">
Quote attribute.
XML
match item {{ 1 => {{}} }}
match item {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
class Item {{ int data; }} obj.data=5;
class Item {{ public int data; }} obj.data=5;
Make field public.
Java
for (int i=0; i<42; i++) {{}}
for (int i=0; i<42; i++) {{}}
Correct.
Java
function process(num) print(num) end
function process(num) print(num) end
Correct.
Lua
$list[7]
if ($list.Count -gt 7) {{ $list[7] }}
Check bounds.
PowerShell