Easy Peasy v4

memo

This helper provides you with a mechanism by which to create a memoised function. A memoised function will cache its results until its inputs change.

Internally Easy Peasy uses a lot of memoisation, and there are cases you may want to create a memoised function, incorporating it into your Easy Peasy model. This helper allows you to avoid bringing your own memoisation library to the table.

Arguments

  • fn (Function, required)

    The function to memoise.

  • cacheSize (number, required)

    The size of the memoisation cache. Your memoised function will cache variations of the inputs to your function up to the given cache size.

Example

import { memo } from 'easy-peasy';

const fullName = (firstName, lastName) => `${firstName} ${lastName}`;

const memoisedFullName = memo(fullName, 2);

memoisedFullName('Mary', 'Poppins'); // new cache entry
memoisedFullName('Mary', 'Poppins'); // cache hit
memoisedFullName('Bob', 'Poppins'); // new cache entry
memoisedFullName('Bob', 'Poppins'); // cache hit

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