array-windows

Iterator over all contiguous windows (overlapping subslices) of predetermined size from a given array. The windows overlap. If the window slice is shorter than size, the iteration ends. size must not be bigger than the array length.

Install

$ npm install array-windows

$ yarn add array-windows

Use

const arrayWindows = require('array-windows')
const arr = ['b', 'a', 'l', 'i']
const windowSize = 2

arrayWindows(arr, windowSize, function(win) {
  // win variable contains an array with length equals to windowSize
  // 1 Iteration: win is ['b', 'a']
  // 2 Iteration: win is ['a', 'l']
  // 3 Iteration: win is ['l', 'i']
})

API

arrayWindows(array, size, callback)

array array

An array containing the values that we want to iterate through.

size number

It represents how many values to the right of the current iteration index the the algorithm will take into account to call the callback with.

callback(win) function

This function will receive the window slice as an argument, the length of this array is determined by the size attribute. If the window slice is shorter than the size the iteration ends.