Kv

kv

• a key-value data structure
• with strings for keys
• 'immutable'
• json/redux friendly
• fast (O(logN)) updates
• fast reads via WeakMap memoization

npm install @threepointone/kv --save

api

import { make, get, set, del, entries, toObject } from '@threepointone/kv'

• make() : create a new kv store

let o = make()

• get(o, key) : like o[key]

• set(o, key, value) : like { ...o, [key]: value }

• del(o, key) : like { ...o, [key]: undefined }

• entries(o): returns an array of [k, v] entries

• toObject(o) : returns a regular js object with k:v entries

rationale

(AKA "Why would I use this over Immutable.js/mori/seamless-immutable/etc?")

I made this module for redux-react-local, to solve a very specific use case with unique constraints. Specifically -

• fast writes/updates
• it sticks close to regular json objects, no custom types
• redux friendly, ie - you can stick it on a redux store and it should just work
• server side render friendly - because they're regular objects, one can simply serialize/deserialize across the wire
• did not need Lists, Vectors, etc,

todo

• satisfy Iterable protocol
• compare perf with other libs
• reclaim GC when deleting keys