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This is one of those features that I've read Lua has and JS doesn't that sounds really good in theory. But I haven't ever run into a situation where I've wanted
by maxwell 18y ago
This is one of those features that I've read Lua has and JS doesn't that sounds really good in theory. But I haven't ever run into a situation where I've wanted an index other than a number or string. It's probably just a blub paradox though; I'm curious, in what situations are other values particularly useful as keys?
- LogicHoleFlaw 18y agoIn Lua I've done stuff like maps of functions to tables of functions for permuting different methods of computation... kinda wacky but it does what I need.
- boucher 18y agoAny time you ever need to map an object to another object, you need this functionality. Without a memory address, object's don't have any other unique values associated with them. It's actually a pretty fundamental problem. Of course, like most things wrong with javascript, you can fix it if you work for it. Objective-J fixes all the things we had problems with, and this is one of them. A lot of things in Cappuccino would not be possible without the hashing feature Tom mentioned. As a hash table, JavaScript objects are pretty awful. You can't get a count of objects unless you literally count all the keys. And you can't iterate over the keys if anyone else has added anything to the Object prototype. Cappuccino has a proper hash table, CPDictionary, which solves both of those problems. There's a lot of other data structures that address some of the author's listed concerns.