weakmap-memoize
v0.0.2 memoize weakmap
weakmap-memoize
This is a very lightweight WeakMap
-based memoization wrapper that allows you to
use your own preferred WeakMap
implementation, of which there are
many.
NOTE: You are constrained in that only the first argument to your function will used to do the memoization, and it must be an object.
Usage:
var memoize = require('weakmap-memoize')
var WeakMapShim = require('weakmap-shim')
var times = 0
var myFunction = memoize(WeakMapShim(), function (obj) {
times++
return obj.num + 1
})
var one = {num: 1}
var two = {num: 2}
assert.equal(myFunction(one), 2)
assert.equal(times, 1)
assert.equal(myFunction(one), 2)
assert.equal(times, 1)
assert.equal(myFunction(two), 3)
assert.equal(times, 2)
assert.equal(myFunction(two), 3)
assert.equal(times, 2)
myFunction = memoize(WeakMapShim(), function (obj1, obj2) {
return obj1.num + obj2.num
})
assert.equal(myFunction(one, two), 3)
npm i [email protected]
Metadata
- Public Domain
- Whatever
- Daniel Naab
- released 12/21/2015