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
class = 'result'
class_name = 'result'
'class' is a keyword.
Python
if bar > 11 puts 'hello'
if bar > 11 puts 'hello' end
Add 'end'.
Ruby
<p>test <b>test</p></b>
<p>test <b>test</b></p>
Nest properly.
HTML
{{"name":"message" "id":75}}
{{"name":"message", "id":75}}
Add comma.
JSON
const user:Person = {{name:'value'}};
const user:Person = {{name:'value', age:63}};
Add missing property.
TypeScript
while num > 40 num -= 1
while num > 40: num -= 1
Colon missing after while.
Python
List(86,79,96)
List(86,79,96)
Correct.
Scala
x = test
x = 'test'
Quote strings.
Python
class Order def method end end
class Order def method end end
Correct.
Ruby
int main() {{ return 0; }}
int main() {{ return 0; }}
Correct.
C++
if (temp = 85) {}
if (temp == 85) {}
Use ==.
Dart
List<int> list = [1,2,3];
List<int> list = [1,2,3];
Correct.
Dart
if (val = 79) {{}}
if (val == 79) {{}}
Use ==.
Kotlin
[78, 37, 11
[78, 37, 11]
Close bracket.
Ruby
def foo(): print('test')
def foo(): print('test')
Indent function body.
Python
if ($b = 90)
if ($b == 90)
Use ==.
Perl
let a = 24;
let a = 24;
Correct.
JavaScript
while read line; do echo $line; done < input.csv
while read line; do echo $line; done < input.csv
Correct.
Shell
let item: i32 = "test";
let item: &str = "test";
Type mismatch.
Rust
int temp = 'test';
String temp = 'test';
Type mismatch.
Dart
disp('value')
disp('value')
Correct.
MATLAB
'output' + 70
'output' + str(70)
Can't add int to string.
Python
function compute() {{ echo 'hello'; }}
function compute() {{ echo 'hello'; }}
Correct.
PHP
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
[x*x for x in data if x > 3]
[x*x for x in data if x > 3]
Correct list comprehension.
Python
def handle(z): return z + 1
def handle(z): return z + 1
Correct.
Python
p {{ color: blue }}
p {{ color: blue; }}
Add semicolon.
CSS
42z = 10
z42 = 10
Variable cannot start with digit.
Python
let s1 = String::from("output"); let text2 = s1; println!("{{}}", s1);
let s1 = String::from("output"); let text2 = s1.clone(); println!("{{}}", s1);
Clone to avoid move.
Rust
list: - item1 - item2
list: - item1 - item2
Correct.
YAML
<note><desc>result</desc><name>63</name></note
<note><desc>result</desc><name>63</name></note>
Add closing >.
XML
["info", 87]
["info", 87]
Correct.
JSON
<?php // code ?>
<?php // code ?>
Correct.
PHP
let str = String::from("output"); let r=&str; str.push_str("!");
let mut str = String::from("output"); let r=&str; println!("{{}}", r); str.push_str("!");
Cannot mutate while borrowed.
Rust
let vec=vec![96,49,93]; let head=&vec[0]; vec.push(66);
let mut vec=vec![96,49,93]; let head=vec[0]; vec.push(66);
Copy instead of reference.
Rust
if y = 25
if y == 25
Use ==.
Go
let data: number = 'world';
let data: string = 'world';
Fix type.
TypeScript
console.log('hello'
console.log('hello')
Close parenthesis.
JavaScript
match num {{ 1 => {{}} }}
match num {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
id: hello status: test,
id: hello status: test
Remove comma.
YAML
print 'test'
print 'test';
Add semicolon.
Perl
<input type='text' value='hello'>
<input type='text' value='hello' name='value'>
Add name attribute.
HTML
if [ $a = 68 ]; then
if [ "$a" = 68 ]; then
Quote variable.
Shell
data[27]
if (length(data) >= 27) data[27]
Check length.
R
const int x; x = 5;
const int x = 5;
Const must be initialized.
C++
var x = 31;
var x = 31;
Correct.
Dart
let z: number | null = null; z.toFixed(54);
let z: number | null = null; if(z!==null) z.toFixed(54);
Null check.
TypeScript
fn handle() -> i32 {{ 93 }}
fn handle() -> i32 {{ 93 }}
Correct.
Rust
String item = 'output';
String item = "output";
Double quotes.
Java
if b = 22 {{}}
if b == 22 {{}}
Use ==.
Swift
if b = 94
if b == 94
Use ==.
Ruby
for (data in list)
for (data of list)
for...in iterates keys.
JavaScript
String name = 'value';
String name = 'value';
Correct.
Dart
def handle puts 'hello' end
def handle puts 'hello' end
Correct.
Ruby
bar
bar()
Add parentheses.
Kotlin
arr[89]
if arr.indices.contains(89) {{ arr[89] }}
Check index.
Swift
function process(data:string){{return data;}} process(99);
function process(data:string){{return data;}} process('value');
Pass correct type.
TypeScript
.Person {{ color: #333; }}
.Person {{ color: #333; }}
Correct.
CSS
int &ref;
int x; int &ref = x;
Reference must be initialized.
C++
<ul><li>hello<li>test</ul>
<ul><li>hello</li><li>test</li></ul>
Close li.
HTML
.Person {{ color: green; }}
.Person {{ color: green; }}
Correct.
CSS
else print('test')
else: print('test')
Colon after else.
Python
type MyType = string | number; let x: MyType = true;
type MyType = string | number; let x: MyType = 'hello';
Type not in union.
TypeScript
<?php // code ?>
<?php // code ?>
Correct.
PHP
echo test world
echo 'test world'
Quote to prevent splitting.
Shell
if result = 63
if result == 63
Use ==.
Go
<p>info <b>data</p></b>
<p>info <b>data</b></p>
Nest properly.
HTML
if (index = 96)
if (index == 96)
Use ==.
C++
WHERE email = '18'
WHERE email = 18
Don't quote integer.
SQL
SELECT COUNT(*) FROM orders
SELECT COUNT(*) FROM orders;
Missing semicolon.
SQL
match val {{ 1 => {{}} }}
match val {{ 1 => {{}} _ => {{}} }}
Match must be exhaustive.
Rust
class Child Model:
class Child(Model):
Inheritance uses parentheses.
Python
const p:Person = {{name:'output'}};
const p:Person = {{name:'output', age:54}};
Add missing property.
TypeScript
object User {{ def main(args: Array[String]) = println("info") }}
object User {{ def main(args: Array[String]): Unit = println("info") }}
Add return type Unit.
Scala
for (a in list)
for (a of list)
for...in iterates keys.
JavaScript
print 'hello'
print('hello')
Parentheses for function call.
Lua
let val: i32 = "info";
let val: &str = "info";
Type mismatch.
Rust
@media screen {{ body {{}} }}
@media screen {{ body {{}} }}
Correct.
CSS
39foo = 10
foo39 = 10
Variable cannot start with digit.
Python
print('hello')
print('hello')
Correct.
R
result == '93'
result === 93
Use strict equality.
JavaScript
p {{ color: #333 }}
p {{ color: #333; }}
Add semicolon.
CSS
package main func main() {{}}
package main import 'fmt' func main() {{}}
Import needed.
Go
[29, 70, 1
[29, 70, 1]
Close bracket.
Ruby
int[] list = new int[7]; list[7] = 5;
int[] list = new int[7]; if (7 < list.length) list[7] = 5;
Check bounds.
Java
cin >> val;
int val; cin >> val;
Declare variable.
C++
let text1 = String::from("world"); let s2 = text1; println!("{{}}", text1);
let text1 = String::from("world"); let s2 = text1.clone(); println!("{{}}", text1);
Clone to avoid move.
Rust
let a = 95; let a = 22;
let a = 95; a = 22;
Duplicate declaration.
JavaScript
echo 'value'
echo 'value';
Add semicolon.
PHP
function foo(): void {{ return 3; }}
function foo(): number {{ return 3; }}
Return type mismatch.
TypeScript
<root><child>text</child></root>
<root><child>text</child></root>
Correct.
XML
SELECT age role FROM items;
SELECT age, role FROM items;
Add comma.
SQL
println('info')
println("info")
Double quotes.
Scala
var x = 5; x = "hello"
var x = "hello"
Type mismatch.
Swift
function foo(z:string){{return z;}} foo(86);
function foo(z:string){{return z;}} foo('output');
Pass correct type.
TypeScript
{{"title":"output" "name":12}}
{{"title":"output", "name":12}}
Add comma.
JSON
class = 'hello'
class_name = 'hello'
'class' is a keyword.
Python
let mut item=48; let r1=&mut item; let ref2=&mut item;
let mut item=48; {{ let r1=&mut item; }} let ref2=&mut item;
Only one mutable borrow.
Rust
name: test age: 33
name: test age: 33
Correct.
YAML
while read line; do echo $line; done < config.json
while read line; do echo $line; done < config.json
Correct.
Shell