SOME javascript array code example

Example 1: javascript some

const age= [2,7,12,17,21];

age.some(function(person){
return person > 18;}); //true

//es6
const age= [2,7,12,17,21];
age.some((person)=> person>18); //true

Example 2: javascript array some

let array = [1, 2, 3, 4, 5];

//Is any element even?
array.some(function(x) {
  return x % 2 == 0;
}); // true

Example 3: javascript some

const fruits = ['apple', 'banana', 'mango', 'guava'];

function checkAvailability(arr, val) {
  return arr.some(function(arrVal) {
    return val === arrVal;
  });
}

checkAvailability(fruits, 'kela');   // false
checkAvailability(fruits, 'banana'); // true

Example 4: js any array

// There's no isEmpty or any method. 
// You can define your own .isEmpty() or .any()

Array.prototype.isEmpty = function() {
    return this.length === 0;
}

Array.prototype.any = function(func) {
   return this.some(func || function(x) { return x });
}