reversing an array in js
var arr=[1,2,5,6,2]
arr.reverse()javascript reverse array
var arr = [34, 234, 567, 4];
print(arr);
var new_arr = arr.reverse();
print(new_arr);.reverse javascript
const array1 = [1,2,3,4];
console.log('array1:', array1);
//"array1:" Array [1, 2, 3, 4]
const reversed = array1.reverse();
console.log('reversed:', reversed);
//"reversed:" Array [4, 3, 2, 1]
// Careful: reverse is destructive -- it changes the original array.
console.log('array1:', array1);
//"array1:" Array [4, 3, 2, 1]js reverse nested array
var reversed = array.map(function reverse(item) {
return Array.isArray(item) && Array.isArray(item[0])
? item.map(reverse)
: item.reverse();
});array reverse algorithm in js
let array1 = ["yes", "no", "maybe", "always", "sometimes", "never", "if"];
let array2 = [5,8,2,9,5,6,3,1];
function reverseArray(arr) {
var newArray = [];
for (var i = arr.length - 1; i >= 0; i--) {
newArray.push(arr[i]);
}
return newArray;
}
reverseArray(array1); // ["if", "never", "sometimes", "always", "maybe", "no", "yes"]
reverseArray(array2); // [1, 3, 6, 5, 9, 2, 8, 5]reverse array in javascript
const reverseArray = arr => arr.reduce((acc, val) => [val, ...acc], [])Copyright © 2021 Codeinu
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