how to see if 2 numbers in an array are equal in javascript code example

Example 1: check if 2 arrays are equal javascript

const a = [1, 2, 3];
const b = [4, 5, 6];
const c = [1, 2, 3];

function arrayEquals(a, b) {
  return Array.isArray(a) &&
    Array.isArray(b) &&
    a.length === b.length &&
    a.every((val, index) => val === b[index]);
}

arrayEquals(a, b); // false
arrayEquals(a, c); // true

Example 2: check if 2 arrays are equal javascript

var arraysMatch = function (arr1, arr2) {

	// Check if the arrays are the same length
	if (arr1.length !== arr2.length) return false;

	// Check if all items exist and are in the same order
	for (var i = 0; i < arr1.length; i++) {
		if (arr1[i] !== arr2[i]) return false;
	}

	// Otherwise, return true
	return true;

};

Example 3: javascript check if an array has same consecutive values

const arr = ["g", "z", "z", "v" ,"b", "b", "b"];
const checkThree = arr => {
   const prev = {
      element: null,
      count: 0
   };
   for(let i = 0; i < arr.length; i++){
      const { count, element } = prev;
      if(count === 2 && element === arr[i]){
         return true;
      };
      prev.count = element === arr[i] ? count + 1 : count;
      prev.element = arr[i];
   };
   return false;
};
console.log(checkThree(arr));
console.log(checkThree(["z", "g", "z", "z"]));