Working with arrays in javascript Part 2

Concat.js

var arr = [10, 20, 30, 40, 50, 60, 70, 80, 90, 100];
var arrCopy = [110, 120, 130, 140, 150, 160, 170, 180, 190, 200];
var newArr = arr.concat(arrCopy);
console.log(newArr);
console.log(arr);
console.log(arrCopy);

// output
// [10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200]
// [10, 20, 30, 40, 50, 60, 70, 80, 90, 100]
// [110, 120, 130, 140, 150, 160, 170, 180, 190, 200]

Filter.js

var arr = [10, 20, 30, 40, 50, 60, 70, 80, 90, 100];

function divisible (elem) {
	return elem % 20 == 0
}

console.log(arr.filter(divisible)); // output [20, 40, 60, 80, 100]

ForEach.js

var arr = [10, 20, 30, 40, 50, 60, 70, 80, 90, 100];

function output (elem, index) {
	console.log(elem + ' is present at ' + (index + 1) + ' position.');
}

arr.forEach(output);
// outout
// 10 is present at 1 position.
// 20 is present at 2 position.
// 30 is present at 3 position.
// 40 is present at 4 position.
// 50 is present at 5 position.
// 60 is present at 6 position.
// 70 is present at 7 position.
// 80 is present at 8 position.
// 90 is present at 9 position.
// 100 is present at 10 position.

Popnshift.js

var arr = [10, 20, 30, 40, 50, 60, 70, 80, 90, 100];
console.log(arr.pop()); // 100
console.log(arr.shift()); // 10
console.log(arr); // [20, 30, 40, 50, 60, 70, 80, 90]

Reverse.js

var arr = [10, 20, 30, 40, 50, 60, 70, 80, 90, 100];
var revArr = arr.reverse();
console.log(revArr); // output : [100, 90, 80, 70, 60, 50, 40, 30, 20, 10]

Split.js

var str = "This will be converted to an array";
var arr = str.split(" ");
console.log(arr); // output ["This", "will", "be", "converted", "to", "an", "array"]

var newstr = "This,will,be,converted,to,an,array";
var newarr = newstr.split(",");
console.log(newarr); // output ["This", "will", "be", "converted", "to", "an", "array"]