Discovering the total of elements within any given JavaScript array

Question

Discovering the total of elements within any given JavaScript array

I have a complex array structure and I am looking for a way to calculate the sum of all numbers without using Array.isArray method:

let arr = [[1, 2, 3, [4, 5, [6, 7]]], [8, [9, 10]]];

An ideal solution would transform the array like this:

let arr = [[1, 2, 3, 4, 5], [6, 7, 8], [9, 10]]; 

for (let i = 0; i < arr.length; i++) { 
   for (let j = 0; j < arr[i].length; j++) { 
      console.log(arr[i][j]);
   }
}

If you have any suggestions on how to accomplish this task, please share them with me.

javascript arrays sum

Answer 1

Answer №1

Solution

To achieve this, utilize the flat and reduce methods.

Illustration

let array = [[7, 4, 
6, [2, 9, [1, 5]]], 
[3, [8, 10]]];

array.flat(Infinity).reduce((x, y) => x + y, 0)

Resources

Flat: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/flat

Reduce: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reduce

Answer 2

Solution

To achieve this, utilize the flat and reduce methods.

Illustration

let array = [[7, 4, 
6, [2, 9, [1, 5]]], 
[3, [8, 10]]];

array.flat(Infinity).reduce((x, y) => x + y, 0)

Resources

Flat: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/flat

Reduce: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reduce

Answer 3

Answer №2

To achieve this, you can utilize the Array#flat method along with Array#reduce to flatten the array or alternatively verify the type of the value using the instanceof operator.

function calculateSum(array) {
    return array.flat(Infinity).reduce((sum, value) => sum + value, 0);
}

function findTotal(array) {
    let total = 0;
    for (const value of array) {
        total += value instanceof Array
            ? findTotal(value)
            : value
    }
    return total;
}

let numArray = [[1, 2, 3, [4, 5, [6, 7]]], [8, [9, 10]]];

console.log(calculateSum(numArray));
console.log(findTotal(numArray));

Answer 4

To achieve this, you can utilize the Array#flat method along with Array#reduce to flatten the array or alternatively verify the type of the value using the instanceof operator.

function calculateSum(array) {
    return array.flat(Infinity).reduce((sum, value) => sum + value, 0);
}

function findTotal(array) {
    let total = 0;
    for (const value of array) {
        total += value instanceof Array
            ? findTotal(value)
            : value
    }
    return total;
}

let numArray = [[1, 2, 3, [4, 5, [6, 7]]], [8, [9, 10]]];

console.log(calculateSum(numArray));
console.log(findTotal(numArray));

Answer 5

Answer №3

To accomplish this task, you can utilize the power of the lodash library:

var _ = require("lodash");
var nestedArray = [[1, 2, 3, [4, 5, [6, 7]]], [8, [9, 10]]];
flatArray = _.flattenDeep(nestedArray);
sum = flatArray.reduce((accumulator, currentValue) => accumulator + currentValue, 0);

Answer 6

To accomplish this task, you can utilize the power of the lodash library:

var _ = require("lodash");
var nestedArray = [[1, 2, 3, [4, 5, [6, 7]]], [8, [9, 10]]];
flatArray = _.flattenDeep(nestedArray);
sum = flatArray.reduce((accumulator, currentValue) => accumulator + currentValue, 0);

Discovering the total of elements within any given JavaScript array

Answer №1

Solution

Illustration

Resources

Answer №2

Answer №3

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