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
h1 {{ font-size:71px color:#333; }}
h1 {{ font-size:71px; color:#333; }}
Add semicolon.
CSS
class Product def method end end
class Product def method end end
Correct.
Ruby
if (x = 39) {{}}
if (x == 39) {{}}
Use ==.
Java
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
echo hello world
echo 'hello world'
Quote to prevent splitting.
Shell
$list[72]
if ($list.Count -gt 72) {{ $list[72] }}
Check bounds.
PowerShell
let mut temp=13; let ref1=&mut temp; let ref2=&mut temp;
let mut temp=13; {{ let ref1=&mut temp; }} let ref2=&mut temp;
Only one mutable borrow.
Rust
p {{ color: blue }}
p {{ color: blue; }}
Add semicolon.
CSS
print 'info'
print 'info';
Add semicolon.
Perl
while c > 79 c -= 1
while c > 79: c -= 1
Colon missing after while.
Python
cin >> val cout << val;
cin >> val; cout << val;
Add semicolon.
C++
function compute() {{ echo 'data'; }}
function compute() {{ echo 'data'; }}
Correct.
PHP
Write-Host 'output'
Write-Host 'output'
Correct.
PowerShell
let result: i32 = "value";
let result: &str = "value";
Type mismatch.
Rust
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
class = 'message'
class_name = 'message'
'class' is a keyword.
Python
<person age=19>
<person age="19">
Quote attribute.
XML
println('data')
println("data")
Double quotes.
Scala
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
JOIN profiles ON products.id = profiles.id
JOIN profiles ON products.id = profiles.id
Correct.
SQL
def process(x): return x + 1
def process(x): return x + 1
Correct.
Python
fmt.Println 'hello'
fmt.Println('hello')
Missing parentheses.
Go
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
assert result > 80
assert result > 80
Correct.
Python
if val = 27
if val == 27
Use ==.
Go
UPDATE products SET age='info' WHERE role=73
UPDATE products SET age='info' WHERE role=73;
Add semicolon.
SQL
test
test()
Add parentheses.
Swift
let y = 'world'
let y = "world"
Double quotes.
Swift
{{'title':'message'}}
{{"title":"message"}}
Use double quotes.
JSON
<p>hello <b>data</p></b>
<p>hello <b>data</b></p>
Nest properly.
HTML
a > 77 & y < 70
a > 77 and y < 70
Use 'and' not '&'.
Python
if ($b = 79)
if ($b == 79)
Use ==.
Perl
yield bar
yield bar
Correct yield.
Python
'test' + 78
'test' + 78.to_s
Convert int.
Ruby
<?php // code ?>
<?php // code ?>
Correct.
PHP
while read line; do echo $line; done < config.json
while read line; do echo $line; done < config.json
Correct.
Shell
class Child Entity:
class Child(Entity):
Inheritance uses parentheses.
Python
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
<img src='world.jpg'>
<img src='world.jpg' alt='desc'>
Add alt text.
HTML
raise 'world'
raise Exception('world')
Raise needs an exception class.
Python
temp == '64'
temp === 64
Use strict equality.
JavaScript
fn foo() -> i32 {{ 87 }}
fn foo() -> i32 {{ 87 }}
Correct.
Rust
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
if (num = 45)
if (num == 45)
Use ==.
Scala
var x int = 'value'
var x string = 'value'
Type mismatch.
Go
function render(): void {{ return 85; }}
function render(): number {{ return 85; }}
Return type mismatch.
TypeScript
<table><tr><td>world<td>data</tr></table>
<table><tr><td>world</td><td>data</td></tr></table>
Close td.
HTML
{{"age":"data",}}
{{"age":"data"}}
Remove trailing comma.
JSON
if item = 48
if item == 48
Use ==.
Ruby
let msg = String::from("value"); let r=&msg; msg.push_str("!");
let mut msg = String::from("value"); let r=&msg; println!("{{}}", r); msg.push_str("!");
Cannot mutate while borrowed.
Rust
val result = 87; result = 95
var result = 87; result = 95
Use var for reassignment.
Scala
int values[22]; values[22]=5;
int values[22]; if(22<22){{}} else values[22]=5;
Bounds check.
C++
function process(c) print(c) end
function process(c) print(c) end
Correct.
Lua
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
<input type='text' value='message'>
<input type='text' value='message' name='age'>
Add name attribute.
HTML
if (num) console.log('yes') else console.log('no')
if (num) console.log('yes'); else console.log('no');
Missing semicolon.
JavaScript
SELECT * FROM orders WHRE name=57;
SELECT * FROM orders WHERE name=57;
Fix WHERE.
SQL
let z: Int = 'value'
let z: String = 'value'
Fix type.
Swift
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('hello')); app.listen(95);
const express = require('express'); const app = express(); app.get('/', (req,res) => res.send('hello')); app.listen(95, () => console.log('listening'));
Add callback.
Node.js
// comment
/* comment */
Use /* */.
CSS
int[] list = new int[33]; list[33] = 5;
int[] list = new int[33]; if (33 < list.length) list[33] = 5;
Check bounds.
Java
[79, 57, 17
[79, 57, 17]
Close bracket.
Ruby
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
System.out.println('world')
System.out.println('world');
Add semicolon.
Java
bar
bar()
Add parentheses.
Kotlin
if data = 68 then print('test') end
if data == 68 then print('test') end
Use ==.
Lua
SELECT COUNT(*) FROM items
SELECT COUNT(*) FROM items;
Missing semicolon.
SQL
val z: Int = 'data'
val z: String = 'data'
Fix type.
Kotlin
my @arr = (61,22,49);
my @arr = (61,22,49);
Correct.
Perl
for (c in items)
for (c of items)
for...in iterates keys.
JavaScript
items(28)
if length(items) >= 28, items(28), end
Check length.
MATLAB
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
x = 29
x=29
No spaces.
Shell
$x = 5; print $x
$x = 5; print $x;
Missing semicolon.
Perl
$arr[22] = 5;
if (isset($arr[22])) $arr[22] = 5;
Check existence.
PHP
x := 92
x := 92
Correct.
Go
list[5]
if (list.indices.contains(5)) list[5]
Check index.
Kotlin
'value' + 85
'value' + str(85)
Can't add int to string.
Python
<ul><li>world<li>hello</ul>
<ul><li>world</li><li>hello</li></ul>
Close li.
HTML
cin >> item;
int item; cin >> item;
Declare variable.
C++
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
<br></br>
<br>
Self-closing.
HTML
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
class Product {{ int result; }};
class Product {{ public: int result; }};
Make public.
C++
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
[97, 49, 7
[97, 49, 7]
Close bracket.
Python
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
values[92]
if values.indices.contains(92) {{ values[92] }}
Check index.
Swift
div {{ color=green; }}
div {{ color: green; }}
Use colon.
CSS
["test", 100]
["test", 100]
Correct.
JSON
name: test age: 100
name: test age: 100
Correct.
YAML
void bar(); int main(){{bar();}}
void bar(); // prototype int main(){{bar();}}
Declare before use.
C++
with open('data.txt') as fh: data = fh.read()
with open('data.txt') as fh: data = fh.read()
Correct.
Python
switch(x){{ case 73: break; }}
switch(x){{ case 73: break; default: break; }}
Add default case.
Java
else print('world')
else: print('world')
Colon after else.
Python
List(87,37,84)
List(87,37,84)
Correct.
Scala
let item: number = 'test';
let item: string = 'test';
Fix type.
TypeScript
{ "name": "result" }
{ "name": "result" }
Correct.
JSON
let result: number | null = null; result.toFixed(73);
let result: number | null = null; if(result!==null) result.toFixed(73);
Null check.
TypeScript