Package Exports

@songbaek/fifo-map
@songbaek/fifo-map/dist/index.js

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Readme

Fifo-map

Simple FIFO behavior map cache using Map(key,value) and Array(for improving FIFO performance).
If your usecase can be enough with get(read item), put(put item & FIFO manage when size is full), delete(invalidate item on your own), it will be fast-read choice.

Memory Usage

Caching N items: N Map items, N ~ 2N Array items
(When using delete() frequently, maximum 2N Array items can be created)

Examples:

Init:

const fifoMap  = new FifoMap({maxSize: 10000});

Get:

fifoMap.get( key )

Get value as key matches. It will return value if key matches, otherwise return undefined.

const value = fifoMap.get( key );

Put:

fifoMap.put( key, value )

Put item. If size is full, it deletes item as FIFO and return deleted item as { key, value }, otherwise return undefined.

const oldItem = fifoMap.put( key, value );

Delete:

fifoMap.delete( key )

Delete item if exists. It will return { key, value } if key matches, otherwise return undefined.

const deletedItem = fifoMap.delete( key );

Clear:

fifoMap.clear()

clear all items.

fifoMap.clear()