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begin() and end() return iterators. Python has iterators too, so this concept shouldn't be alien to Python programmers. reverse() is a generic algorithm that op
by nly 13y ago
begin() and end() return iterators. Python has iterators too, so this concept shouldn't be alien to Python programmers. reverse() is a generic algorithm that operates on any pair of bidirectional iterators.
Actually, in C++, you ideally wouldn't reverse the string at all... you'd just call str.rbegin() and str.rend() to grab the reverse iterators, and pass them straight to your next algorithm.
The two approaches are just as consistent as one another, Python just uses a terser syntax (which, in my opinion, isn't as obvious).
In C++14, if all things go according to plan with Concepts Lite, you'll be able to write a short 3-5 line, reusable, version of reverse() that takes your string (or container) as one argument, deduces at compile time, during overload resolution, that begin() and end() return bidirectional iterators, and then does the right thing. Failing that, C++14 may introduce Ranges. So C++ is only getting terser.
- general_failure 13y agoreverse iterate a string? i have never done that
- com2kid 13y ago> Failing that, C++14 may introduce Ranges. It would have been nice to have some sort of simple range syntax added to C or C++ long ago. In the true spirit of C, don't even make it safe, just make it bloody well work. FirstArray[0..3] = SecondArray[4..7]; case 2..10: for(int i : 0..ArrayLength) for(int i : ArrayLength..0) (hah that'd prove horrible if ArrayLength ended up being a negative number, obviously some proper syntax would need to be determined :) ) I am always annoyed that such simple things are ignored in the language. Sure they don't enable any "cool new abilities", but they make using the language a lot more friendly (especially in comparison to having a ton of case fall through statements!)
- nly 13y agoThe problem is your proposed [] syntax implies random access. Many algorithms and data structures don't require or support random access.