Example 1: find element in array javascript
const simpleArray = [3, 5, 7, 15];
const objectArray = [{ name: 'John' }, { name: 'Emma' }]
console.log( simpleArray.find(e => e === 7) )
console.log( simpleArray.find(e => e === 10) )
console.log( objectArray.find(e => e.name === 'John') )
Example 2: javascript find
const inventory = [
{name: 'apples', quantity: 2},
{name: 'cherries', quantity: 8}
{name: 'bananas', quantity: 0},
{name: 'cherries', quantity: 5}
{name: 'cherries', quantity: 15}
];
const result = inventory.find( ({ name }) => name === 'cherries' );
console.log(result)
Example 3: javascript array.find
const array1 = [5, 12, 8, 130, 44];
const found = array1.find(element => element > 10);
console.log(found);
Example 4: function search in javascript array
function findInArray(ar, val) {
for (var i = 0,len = ar.length; i < len; i++) {
if ( ar[i] === val ) {
return i;
}
}
return -1;
}
var ar = ['Rudi', 'Morie', 'Halo', 'Miki', 'Mittens', 'Pumpkin'];
alert( findInArray(ar, 'Rudi') );
alert( findInArray(ar, 'Coco') );
Example 5: array find
const array1 = [5, 12, 8, 130, 44];
const found = array1.find(element => element > 10);
console.log(found);
Example 6: javascript array find
var myArrayOfAges = [1,4,6,8,9,13,16,21,53,78];
var result = myArrayOfAges.find(age => age >= 12);
console.log(result);
if (!Array.prototype.find) {
Object.defineProperty(Array.prototype, 'find', {
value: function(predicate) {
if (this == null) {
throw TypeError('"this" is null or not defined');
}
var o = Object(this);
var len = o.length >>> 0;
if (typeof predicate !== 'function') {
throw TypeError('predicate must be a function');
}
var thisArg = arguments[1];
var k = 0;
while (k < len) {
var kValue = o[k];
if (predicate.call(thisArg, kValue, k, o)) {
return kValue;
}
k++;
}
return undefined;
},
configurable: true,
writable: true
});
}