Underscore.m

This brings to mind google's warning re: the use of functional idioms in Java: http://code.google.com/p/guava-libraries/wiki/FunctionalExplained Objective-C blocks make things…

I just spent the last month learning about iOS (and Obj-C). I didn't find the square brackets that terrible. Explicit is better than implicit after all. It seems like dot…

Indeed. Plus I think well-designed Objective-C is some of the prettiest code out there. Though I've been using it for a few years now almost exclusively (for the most part) so…

I've tried that, but once you pass in blocks as arguments, the whole thing becomes a lot harder to read. I have no clue how to indent ``` [[array filter:^BOOL (id obj) { return…

The blocks do make it messy but you don't need them, at least in this simple case, if you write your category to take selectors. [[array filter:@selector(passesTest)]…

It should be a category on NSObject so it supports anything that supports fast enumeration which could be anything. And the indentation in the above is correct. The way you've…

Uh, I did read it. Yes, it's a bad idea. So is adding random things to NSObject for protocols that it does not conform to. That's actually worse, I'd argue, since you suddenly…

I am not saying that named arguments are a bad idea, in fact they are awesome! Often, they make code a lot more readable, consider for example ``` [UIMelon…

What's the advantage of implementing map/filter as property accessors of a wrapper object instead of just doing: ``` NSArray* map(id<NSFastEnumeration> enumerable, id(^)(id…

In the case of NSDictionary, Underscore.m's map iterates over objects and keys. Fast Enumeration only iterates over the dictionary's keys, when you probably want the value or…

What's the advantage of implementing map/filter as property accessors of a wrapper object instead of just doing: ``` NSArray* map(id<NSFastEnumeration> enumerable, id(^)(id…

Interesting if you're already used to underscore.js. The more Objective-C way to do this, without the dot syntax and the need for wrapping, is to add categories (sets of extra…

There are also ports of Underscore.js to Perl & Lua: * http://vti.github.com/underscore-perl/ * http://mirven.github.com/underscore.lua/

And AS3, if you're into that sort of thing (self-plug): https://github.com/amacdougall/underscore.as

What's the advantage of implementing map/filter as property accessors of a wrapper object instead of just doing: ``` NSArray* map(id<NSFastEnumeration> enumerable, id(^)(id…

Objective-C is a superset of C, functions can be just that - a function. Especially for higher-order functions like map and filter. Not everything needs to be glued to an object.