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feat: allow replacement of oldest key#253

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doc-han wants to merge 2 commits intonode-cache:masterfrom
doc-han:auto-replace-oldest
Open

feat: allow replacement of oldest key#253
doc-han wants to merge 2 commits intonode-cache:masterfrom
doc-han:auto-replace-oldest

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@doc-han
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@doc-han doc-han commented Jul 6, 2021

Feature

This pull request is to allow the auto replacement of the oldest key when trying to do a set operation and the max amount of keys has been reached.
Requested by #232

Example

const nodeCache = require("node-cache");
const myCache = new nodeCache({maxKeys: 2, replaceOldestKey: true});

myCache.set("one", "This is the first key");
myCache.set("two", "This is the second key");
// from here maxKeys has been reached, hence, the oldest key which is "one" gets removed
myCache.set("three", "This is the third key");
console.log(myCache.keys());
// output: ["two", "three"]

@cekvenich2
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cekvenich2 commented Oct 29, 2021

Is there a fork where this is included?

danielbom
danielbom reviewed Nov 5, 2021
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@doc-han
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doc-han commented Nov 12, 2021

#212 will make the code on this fix better. Since a Map keeps the order of insertion it'll be easier to locate the oldest key.

@Recodify
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Recodify commented Jan 21, 2022 •
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Would really love this to be merged! Really useful for allowing you to set some sort of vague limit on the size the cache is allow to grow to without preventing new items being inserted. A MAX_HEAP_SIZE option that utilised this "allow replacement of oldest key" method on new insertions would be the holy grail

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@doc-han @cekvenich2 @Recodify @danielbom