CollectionMap

An extension of Map that auto-initializes new values with empty collections and auto-removes empty collections being set

v1.0.2 URL: https://unpkg.com/CollectionMap@1.0.2/collectionmap.js

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autovivification map values initialize collection array set defaults auto-initialize auto-remove defaultdict

@aureooms/js-collections

Python's collections library for JavaScript

v4.0.0 URL: https://unpkg.com/@aureooms/js-collections@4.0.0/lib/index.js

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collection collections count counter defaultdict dict hash javascript js list map ordereddict set

defaultdict2

Dictionary-like object with a handler for missing keys

v1.1.1 URL: https://unpkg.com/defaultdict2@1.1.1/index.js

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defaultdict dictionary missing default default_factory

@notwoods/default-map

A Map subclass that automatically adds missing values

v1.0.0 URL: https://unpkg.com/@notwoods/default-map@1.0.0/index.js

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map default defaultmap default-map defaultdict default-dict collections with default

undefined-killer

Simple solution to this problem: "TypeError: Cannot set property 'x' of undefined"

v1.0.0 URL: https://unpkg.com/undefined-killer@1.0.0/index.js

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undefined-killer undefined typeof property setproperty object defaultdict