accumulate.md

title	tags	author_title	author_url	author_image_url	description	image
accumulate	math,array,beginner	Deepak Vishwakarma	https://github.com/deepakshrma	https://avatars2.githubusercontent.com/u/7682731?s=400	Implementation of "accumulate" in typescript, javascript and deno.	https://www.positronx.io/wp-content/uploads/2018/11/positronx-banner-1152-1.jpg

Returns an array of partial sums.

Use Array.prototype.reduce(), Array.prototype.slice(-1) and the unary + operator to add each value to the unary array containing the previous sum.

const accumulate = (...nums: number[]): number[] =>
  nums.reduce((acc: number[], n) => [...acc, n + +acc.slice(-1)], []);

accumulate(1, 2, 3, 4); // [1, 3, 6, 10]
accumulate(...[1, 2, 3, 4]); // [1, 3, 6, 10]