adjacentCombine (original) (raw)

Combine adjacent values of an array.

function adjacentCombine(x, fc, acc) // x: an array // fc: combine function (u, v) // acc: initial value

const xarray = require('extra-array');

var x = [1, 2, 3, 4]; xarray.adjacentCombine(x, (u, v) => v-u, 0); // → [ 1, 1, 1, 1 ]

xarray.adjacentCombine(x, (u, v) => u*v, 1); // → [ 1, 2, 6, 12 ]

xarray.adjacentCombine(x, (u, v) => u+v, 10); // → [ 11, 3, 5, 7 ]

References

• std::adjacent_difference() : cppreference.com