10 tricky things in JavaScript

1. Remove Duplicates from an Array : We easily remove data from an array to use some way like as filter Method, set, forEach Method, reduce Method, Array Prototype, Underscore JS.
2. Reverse a string : Its a very interesting topic in JavaScript. There are 3 way to reverse a string such as split() method, use For Loop and Recursion way.
3. Bind : Bind creates a new function. Its allow an object to borrow an another object.
4. Global variable : Global variable is very useful in JavaScript. Its access anywhere and anywhere call this.
5. Keyword new : Its a very speacial word in Javascript. Its ceate a object from class constructor.
6. Closures : If we use a function in an another function and return a result to main function then there two function are create a envirment its called Closures.

function timer(){
      let count = 0;
      return function () {
         count++;
        return count;
    }
}
const time = timer();
console.log(time());
const time2 = timer();
console.log(time2());

7. Truthy Vs Falsy : Both are boolean concept Truthy value is considered the value of true and Falsy is considered false.

8. Nun Vs undefined : Nun is empty value. Undefined is declaredvariable but undefinite.

9. Double equal Vs triple equal : Triple equal cheack value and type but double equal only compare type or close anything.

10. Recursive : We do many problem solve use recursive way. Its always has a conditon that stops the function from calling itself.