Hey all, just wanted to throw out a new module of mine that I finished
up this weekend: array-index[0]. This module makes it easy to define
your own "array classes", that invoke custom accessor functions when
the numerical indexes are gotten or set.
I personally needed this module to implement "ref-array", which will
be a module that lets you create arbitrary typed arrays backed by
Buffers using the "ref" interface. Ultimately this will be sweet when
using node-ffi.
As a silly example, here's how you can invoke "Math.pow(2, index)" for
whatever index is accessed on the "array-index" instance:
var ArrayIndex = require('array-index')
// let's just create a singleton instance.
var a = new ArrayIndex()
// the "__get__" function is invoked for each "a[n]" access.
a.__get__ = Math.pow.bind(Math, 2)
// you must set the "length" on each instance manually
a.length = 10
console.log(a)
// [ 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, __get__: [Function] ]
You can probably come up with some pretty sweet use-cases for this,
and let me know if you do! Cheers!
[0]: https://github.com/TooTallNate/array-index
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