I've tried searching for Data Structure / Algorithms books that provide examples in either Objective-C, or another language supporting keyword message syntax, to no avail.
The reason I'm interested in this is because I really think the keyword syntax would help me understand the intent of code, which I find I have to think longer about in languages with typical function call syntax.
A good example is this snippet from a SplayTree implementation in C:
/* Continue down the tree. */
n = splay_tree_splay_helper (sp, key, next, node, parent);
The function name is pretty unhelpful, and even with the comment I have to thoroughly read the code to have any idea what's really happening there.
I know that technically any piece of C code is valid Objective-C, but I'm looking for something that structures algorithm implementations utilizing a good object model like Objective-C's since I believe the resulting code is more maintainable. This may seem counter-intuitive in the performance restricted space of algorithm design, but I've seen plenty of Algorithms books that have examples in idiomatic Ruby, Python, Javascript etc.
Basically I'm looking for anything with a good object model that allows for very descriptive keyword messages, whether it's Objective-C or even (though probably unlikely) anything else in the Smalltalk family.
Why would you want a book? Just download a smalltalk environment and read the whole actual source. Open a system browser, select one of the Collections categories (collection of classes) and start browsing the code (the extra column is for message categories). Open a workspace, type Object cmd-B (or ctrl-B, for browse) and see for yourself why the single responsibility principle was invented. Navigate through the code with hierarchy, senders and implementors.