namedtuplemap

NamedTupleMap

A Map which accepts a named tuple as a key. This lib is one of the several possible cache for memoize-immutable, but it can suit other use-cases as it implements a usual Map API.

Install

npm install --save NamedTupleMap

This lib has no dependency, but requires a native implementation of Map.

Usage

var NamedTupleMap = require('NamedTupleMap');

// When the `limit` option is set, NamedTupleMap turns into an LRU cache.
// Clearing the map every X seconds can also be an acceptable strategy sometimes.
var cache = new NamedTupleMap({ limit: 10000 });

var keyPart1 = {};
var keyPart2 = 'yolo';
var keyPart3 = [];
var value = {any: 'thing'};

// Note that following named tuples are wrapped in new objects that are !==
// (otherwise a Map would have been enough).
cache.set({
  oh: keyPart1,
  my: keyPart2,
  goodness: keyPart3
}, value);

cache.has({
  oh: keyPart1,
  my: keyPart2,
  goodness: keyPart3
}) === true;
cache.get({
  oh: keyPart1,
  my: keyPart2,
  goodness: keyPart3
}) === value;

Author

@louis_remi

License

MPL-2.0