GeeksForGeeks/Array_Functions_3.html at master · hjaintech/GeeksForGeeks · GitHub

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<html>
	<body>
		<script>

			function reduceFun1(previousValue, currentValue, index, array){
				return previousValue + currentValue;
			}

			var result = [1,2,3,4,5].reduce(reduceFun1);

			console.log(result); // Output : 15


			var arr=[{name: "customer 1", sales: 500, location: "NY"},
					 {name: "customer 1", sales: 200, location: "NJ"},
				 	 {name: "customer 1", sales: 700, location: "NY"},
					 {name: "customer 1", sales: 200, location: "ORD"},
					 {name: "customer 1", sales: 300, location: "NY"}];

			function reduceFun2(previousValue, currentValue, index, array){
				if(currentValue.location === "NY"){
					return previousValue + currentValue.sales;
				}
				return previousValue;
			}

			var totalSalesInNY = arr.reduce(reduceFun2);

			console.log(totalSalesInNY); // Output: 1500


			var arr1 = [1,2,3,4];
			var arr2 = [5,6,7,8];
			var arr3 = arr1.concat(arr2);
			console.log(arr3); // Output :  [1, 2, 3, 4, 5, 6, 7, 8]


			var arr1 = [1,2,3,4];
			var arr2 = [5,6];
			var arr3 = [7,8];
			var arr4 = arr1.concat(arr2,arr3);
			console.log(arr4); // Output :  [1, 2, 3, 4, 5, 6, 7, 8]


			var arr1 = [1,2,3,4];
			var arr2 = arr1.concat(5,6,7,8);
			console.log(arr2); // Output :  [1, 2, 3, 4, 5, 6, 7, 8]


			var arr1 = [1,2,3,4];
			var arr2 = [5,6];
			var arr3 = arr1.concat(arr2, 7, 8);
			console.log(arr3); // Output :  [1, 2, 3, 4, 5, 6, 7, 8]


			var arr = [3, 1, 5, 4, 2].sort();
			console.log(arr); // Output : [1, 2, 3, 4, 5]


			var arr = ["Orange", "Apple", "Banana"].sort();
			console.log(arr); // Output : ["Apple", "Banana", "Orange"]


			var arr = [1, 30, 5].sort();
			console.log(arr); // Output : [1, 30, 5]


			function sortFun(a,b){
				return a - b;
			}
			var arr = [1, 30, 5].sort(sortFun);
			console.log(arr); // Output : [1, 5, 30]


			var arr = [{name:"NY",  count: 20},
					   {name:"NJ",  count: 5},
					   {name:"JFK", count: 60},
					   {name:"ORD", count: 1}];

			function sortFun(obj1, obj2){
				return obj1.count - obj2.count;
			}
			arr.sort(sortFun);
			console.log(arr);  // Output [{name:"ORD",  count: 1},
					   		   //	      {name:"NJ",  count: 5},
					   		   //         {name:"NY", count: 20},
					   	       //         {name:"JFK", count: 60}]


			var arr = [1,2,3,4,5,6,7,8,9,10];
			arr.reverse();
			console.log(arr); //Output : [10, 9, 8, 7, 6, 5, 4, 3, 2, 1]


		</script>
	</body>
</html>