Good question. Indeed just "get" and "set" would have been fine, but they're also a little intrusive as names. I wanted these names to be out of the way, kinda like __proto__.
On Tue, Sep 18, 2012 at 2:00 PM, Rick Waldron <[email protected]> wrote: > What is the significance of the dunder-bar naming? If it's numeric indices, > then "get" and "set" would work just the same... unless I'm missing > something? > > Rick > > On Tue, Sep 18, 2012 at 2:41 PM, Nathan Rajlich <[email protected]> > wrote: >> >> 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 >> >> -- >> Job Board: http://jobs.nodejs.org/ >> Posting guidelines: >> https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines >> You received this message because you are subscribed to the Google >> Groups "nodejs" group. >> To post to this group, send email to [email protected] >> To unsubscribe from this group, send email to >> [email protected] >> For more options, visit this group at >> http://groups.google.com/group/nodejs?hl=en?hl=en > > > -- > Job Board: http://jobs.nodejs.org/ > Posting guidelines: > https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines > You received this message because you are subscribed to the Google > Groups "nodejs" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/nodejs?hl=en?hl=en -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en
