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lodash.memoize

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    lodash.memoize

The lodash method `_.memoize` exported as a module.


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Weekly downloads
19M
decreased by-1.84%
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3
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Package description

What is lodash.memoize?

The lodash.memoize package is a function from the Lodash library that creates a memoized version of a function that caches the result of function calls based on the arguments passed. This can improve performance by avoiding repeated calculations for the same inputs.

What are lodash.memoize's main functionalities?

Caching function results

This feature allows you to cache the result of an expensive function call. When the memoized function is called again with the same arguments, the cached result is returned instead of recalculating.

const _ = require('lodash.memoize');
const expensiveFunction = n => {
  console.log('Expensive calculation for', n);
  return n * n;
};
const memoizedExpensiveFunction = _.memoize(expensiveFunction);
console.log(memoizedExpensiveFunction(5));
console.log(memoizedExpensiveFunction(5));

Custom cache resolver

This feature allows you to provide a custom resolver function that determines the cache key for storing results. This is useful when you need to memoize functions that take complex arguments like objects or arrays.

const _ = require('lodash.memoize');
const memoizedFunctionWithResolver = _.memoize(expensiveFunction, (...args) => JSON.stringify(args));
console.log(memoizedFunctionWithResolver({ a: 1 }));
console.log(memoizedFunctionWithResolver({ a: 1 }));

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Readme

Source

lodash.memoize v4.1.2

The lodash method _.memoize exported as a Node.js module.

Installation

Using npm:

$ {sudo -H} npm i -g npm
$ npm i --save lodash.memoize

In Node.js:

var memoize = require('lodash.memoize');

See the documentation or package source for more details.

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Last updated on 13 Aug 2016

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