MemoizeUntil

A unique Memoization Pattern which memoizes until the next time metric - could be until the next minute, hour, day, week.

Get Started

Install memoize_until with:

npm install memoize_until --save-dev

Usage

const MemoizeUntil = require('memoize_until').MemoizeUntil

MemoizeUntil.fetch('min', 'default', () => { 
    return 'SomeComplexOperation'; 
})

options:

1. min : Metric until when you want to memoize. Can be one of ['min', 'hour', 'day', 'week']

2. default : All metric levels come with a 'default' key. More can be added by initializing MemoizeUntil with extra keys

3. cb: callback function. This callback function must return a value which needs to be memoized/cached.

Initialisation

To add custom keys to each metric, pass a custom object to the init function of MemoizeUntil.

MemoizeUntil.init({ 
    min: ['custom1', 'custom2']
})

MemoizeUntil.fetch('min', 'custom1', () => { 
    return 'SomeComplexOperation'; 
})

Extend

To add custom keys during runtime to any metric, use the extend function of MemoizeUntil.

let runtime_key = 'runtime_key';
MemoizeUntil.extend('min', runtime_key)

MemoizeUntil.fetch('min', runtime_key, () => { 
    return 'SomeComplexOperation'; 
})

Nulls

if the value to be memoized is undefined or null, MemoizeUntil wraps it underneath a pseudo null-like object called NullObject and always returns undefined. This ensures that even nulls are memoized.

License

Ritikesh
Licensed under the MIT license.