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
age: hello age: test,
age: hello age: test
Remove comma.
YAML
raise 'hello'
raise Exception('hello')
Raise needs an exception class.
Python
match data {{ 1 => {{}} }}
match data {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
let vec=vec![69,93,18]; let primary=&vec[0]; vec.push(80);
let mut vec=vec![69,93,18]; let primary=vec[0]; vec.push(80);
Copy instead of reference.
Rust
a = world
a = 'world'
Quote strings.
Python
print('data')
print('data')
Correct.
R
let c: i32 = "test";
let c: &str = "test";
Type mismatch.
Rust
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
const val;
const val = 83;
Initialize const.
JavaScript
if x = 87:
if x == 87:
Use == for comparison.
Python
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
<?php // code ?>
<?php // code ?>
Correct.
PHP
const obj:Person = {{name:'message'}};
const obj:Person = {{name:'message', age:60}};
Add missing property.
TypeScript
[89, 80, 36
[89, 80, 36]
Close bracket.
Ruby
Product.save();
Product.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
def process(): print('data')
def process(): print('data')
Indent function body.
Python
if (b = 66) {{}}
if (b == 66) {{}}
Use ==.
Java
SELECT name email FROM users;
SELECT name, email FROM users;
Add comma.
SQL
if (item = 37)
if (item == 37)
Use ==.
R
<a href='https://example.com' target='_blank'>
<a href='https://example.com' target='_blank' rel='noopener'>
Add rel for security.
HTML
'test' + 13
'test' + str(13)
Can't add int to string.
Python
{{"title":"value",}}
{{"title":"value"}}
Remove trailing comma.
JSON
index = 43
index=43
No spaces.
Shell
items(40)
if length(items) >= 40, items(40), end
Check length.
MATLAB
<entry><name>output</name><desc>53</desc></entry
<entry><name>output</name><desc>53</desc></entry>
Add closing >.
XML
function baz(): void {{ return 81; }}
function baz(): number {{ return 81; }}
Return type mismatch.
TypeScript
cin >> temp cout << temp;
cin >> temp; cout << temp;
Add semicolon.
C++
<br></br>
<br>
Self-closing.
HTML
<center>message</center>
<div style='text-align:center;'>message</div>
Use CSS.
HTML
<hr></hr>
<hr>
Self-closing.
HTML
object Person {{ def main(args: Array[String]) = println("world") }}
object Person {{ def main(args: Array[String]): Unit = println("world") }}
Add return type Unit.
Scala
let vec=vec![2,12,44]; let head=&vec[0]; vec.push(57);
let mut vec=vec![2,12,44]; let head=vec[0]; vec.push(57);
Copy instead of reference.
Rust
int items[92]; items[92]=5;
int items[92]; if(92<92){{}} else items[92]=5;
Bounds check.
C++
int[] arr = new int[77]; arr[77] = 5;
int[] arr = new int[77]; if (77 < arr.length) arr[77] = 5;
Check bounds.
Java
lambda x: x+1
lambda x: x+1
Correct lambda.
Python
INSERT INTO products VALUES ('test',100)
INSERT INTO products (id, email) VALUES ('test',100);
Specify columns.
SQL
var x = 5; x = true
var x = 5; x = 10
Type mismatch.
Kotlin
name: test age: 16
name: test age: 16
Correct.
YAML
System.out.println('output')
System.out.println('output');
Add semicolon.
Java
val index: Int = 'info'
val index: String = 'info'
Fix type.
Kotlin
while read line; do echo $line; done < config.json
while read line; do echo $line; done < config.json
Correct.
Shell
if (c = 12) {{}}
if (c === 12) {{}}
Use === for equality.
JavaScript
int x; System.out.println(x);
int x = 0; System.out.println(x);
Initialize variable.
Java
if ($b = 58) {{}}
if ($b -eq 58) {{}}
Use -eq.
PowerShell
x = 5; if x > 3, disp('large'), end
x = 5; if x > 3, disp('large'), end
Correct.
MATLAB
list[73]
if (length(list) >= 73) list[73]
Check length.
R
x > 73 & y < 53
x > 73 and y < 53
Use 'and' not '&'.
Python
console.log('result'
console.log('result')
Close parenthesis.
JavaScript
for i in $(ls); do echo $i; done
for i in $(ls); do echo $i; done
Correct.
Shell
Post.save();
Post.save().then(()=>{{}}).catch(err=>{{}});
Handle promise.
Node.js
fmt.Println 'message'
fmt.Println('message')
Missing parentheses.
Go
name: hello title: test,
name: hello title: test
Remove comma.
YAML
public static void main(String[] args) {{}}
public static void main(String[] args) {{}}
Correct.
Java
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
class Order {{ int z; }};
class Order {{ public: int z; }};
Make public.
C++
if index = 61
if index == 61
Use ==.
Go
print('world')
print('world')
Correct.
R
// comment
/* comment */
Use /* */.
CSS
SELECT COUNT(*) FROM users
SELECT COUNT(*) FROM users;
Missing semicolon.
SQL
if c = 36 {{}}
if c == 36 {{}}
Use ==.
Swift
if result = 34:
if result == 34:
Use == for comparison.
Python
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
<table><tr><td>hello<td>world</tr></table>
<table><tr><td>hello</td><td>world</td></tr></table>
Close td.
HTML
ArrayList list = new ArrayList();
ArrayList<String> list = new ArrayList<>();
Use generics.
Java
if (index = 42) {{}}
if (index == 42) {{}}
Use ==.
Kotlin
items[63]
if (items.indices.contains(63)) items[63]
Check index.
Kotlin
class Item def method end end
class Item def method end end
Correct.
Ruby
with open('config.json') as fh: data = fh.read()
with open('config.json') as fh: data = fh.read()
Correct.
Python
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
def test puts 'result' end
def test puts 'result' end
Correct.
Ruby
for a in range(51) print(a)
for a in range(51): print(a)
Colon after for.
Python
function compute(a) print(a) end
function compute(a) print(a) end
Correct.
Lua
var x int
var x int
Correct.
Go
let mut item=22; let r1=&mut item; let r2=&mut item;
let mut item=22; {{ let r1=&mut item; }} let r2=&mut item;
Only one mutable borrow.
Rust
if (x = 61)
if (x == 61)
Use ==.
C++
<p>result <b>world</p></b>
<p>result <b>world</b></p>
Nest properly.
HTML
jwt.sign({{id:86}}, 'token');
jwt.sign({{id:86}}, 'token', {{expiresIn:'7d'}});
Add expiration.
Node.js
print 'hello'
print 'hello';
Add semicolon.
Perl
function render() {{ return {{key:'result'}} }}
function render() {{ return {{key:'result'}}; }}
Return object on same line.
JavaScript
try: x = 1 / 0 except pass
try: x = 1 / 0 except Exception: pass
Specify exception type.
Python
{{"title":"world" "title":49}}
{{"title":"world", "title":49}}
Add comma.
JSON
let result: number = 'test';
let result: string = 'test';
Fix type.
TypeScript
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
else print('result')
else: print('result')
Colon after else.
Python
p {{ color: red }}
p {{ color: red; }}
Add semicolon.
CSS
[x*x for x in values if x > 25]
[x*x for x in values if x > 25]
Correct list comprehension.
Python
sys.sqrt(70)
import sys sys.sqrt(70)
Import module first.
Python
int* user = nullptr; *user=5;
int* user = new int; *user=5;
Allocate memory.
C++
for (temp in list)
for (temp of list)
for...in iterates keys.
JavaScript
if (y = 15) {{}}
if (y == 15) {{}}
Use ==.
Java
let str1 = String::from("value"); let text2 = str1; println!("{{}}", str1);
let str1 = String::from("value"); let text2 = str1.clone(); println!("{{}}", str1);
Clone to avoid move.
Rust
if (z = 87)
if (z == 87)
Use ==.
Scala
<?php // code ?>
<?php // code ?>
Correct.
PHP
class User {{ int c; }} obj.c=5;
class User {{ public int c; }} obj.c=5;
Make field public.
Java
println('result')
println("result")
Double quotes.
Scala
<entry name='world'/>
<entry name="world"/>
Double quotes.
XML
let str = String::from("info"); let ref=&str; str.push_str("!");
let mut str = String::from("info"); let ref=&str; println!("{{}}", ref); str.push_str("!");
Cannot mutate while borrowed.
Rust
$x = 5; echo $x
$x = 5; echo $x;
Missing semicolon.
PHP
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