javascript .filter() true booleans

Question

function bouncer(arr) {
  // Don\'t show a false ID to this bouncer.
    function a(b) {
      if(b !== false) {
        return b;
      }
    }

    arr = arr.filte         


        

Answer 1

I came across this exercise and was playing about with it somewhat. It ended up helping me understand it a bit better, so if you may I will add a bit of clarity to this bouncer function.

function bouncerOne(array){

let truthy = array.filter(x => x);
// This takes the .filter() and applies the anon function where it takes 
// the value and returns the positive value. All values that are not Falsy including 
// objects and functions would return True. 
console.log("The Truth is:", truthy);//this Outputs the result to the console.
let falsy = array.filter(x => !x); 
//This takes the .filer() and applies the 
//annon function where it takes the value and only returns items that ARE NOT True. 
//So Falsy Values are taken. 
console.log("The Falsy Values are",falsy);

//The annon function of (x => x) & (x => !x)
// really makes use of the strict equality power of JavaScript. 
// Where simple conditional test can be carried out.
};
console.log(bouncerOne([7, "ate", "", false, 9,null,42,"Bingo",undefined,NaN]));
//Returns: The Truth is: [ 7, 'ate', 9, 42, 'Bingo' ]
//The Falsy Values are [ '', false, null, undefined, NaN ]