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Module

x/fun/mod.ts>array.modifyAt

A collection of algebraic data types, lenses, and schemables based on a light weight higher kinded type implementation. Written for deno.
baetheus/fun
Latest
function array.modifyAt
import { array } from "https://deno.land/x/fun@v2.0.0/mod.ts";
const { modifyAt } = array;

Create a new array by modifying a value of an array at an index. If the index is out of range of the existing array then no change is made.

Examples

Example 1

import * as A from "./array.ts";
import { pipe } from "./fn.ts";

const inc = (n: number) => n + 1
const modifyAt = A.modifyAt(0); // Modify value at
const arr = [1, 2, 3];

const result1 = pipe(arr, modifyAt(inc)); // [2, 2, 3]
const result2 = pipe(arr, A.modifyAt(100)(inc)); // [1, 2, 3]

Parameters

index: number