JavaScript Coding Challenge - 1

  Question - Write a program which returns the number of true values there are in an array.
  arrayCount([true, false, false, true, false]) ➞ 2
  arrayCount([false, false, false, false]) ➞ 0
  arrayCount([]) ➞ 0

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// Solution - 1..

const arr = [true, false, false, false, true];
const count = arr.filter(Boolean).length; // The `.filter(Boolean)` just removes values from a list which are "falsey", like empty strings or null.

console.log(count);

// Solution - 2.......

function arrayCount(arr) {
 let result = [];
 for(let i = 0; i < arr.length; i++) {
     if (arr[i] === true) {
         result.push(arr[i]);
     }
 }
 return result.length;
}

console.log(arrayCount([false,false,true,false,true]));

// Solution - 3........

function arrayCount(arr) {
      let count = 0;
      for(let element of arr) if(element===true) count++;
      return count;
 }

console.log(arrayCount([false,false,true,false,true]))