language-comparisons

I'm trying to reimplement python slice notation in another language (php) and looking for a snippet (in any language or pseudocode) that would mimic the python logic. That is, given a list and a triple (start, stop, step) or a part thereof, determine correct values or defaults for all parameters and return a slice as a new list. I tried looking into the source . That code is far beyond my c skills, but I can't help but agree with the comment saying: /* this is harder to get right than you might think */ Also, if something like this is already done, pointers will be greatly appreciated. This is

Having a background in Haskell I am currently trying to get familiar with Scala. I encountered some problems trying to translate a small, extensible expression language from Haskell into Scala. The underlying issue of writing a data type that is extensible with both new data-variants and operations is commonly known as the expression problem . My original solution in Haskell uses type classes and instance declarations with constraints. The base of my expression is defined as follows: module Expr where class Expr e where eval :: e -> Integer data Lit = Lit Integer instance Expr Lit where eval

I am in the planning stages of a new Flash game project and was wondering which language would be better to use? I already have a strong understanding of Actionscript 3, and have not worked with Haxe yet, but I have read the language reference docs and it seems that Haxe has some of the features from my other favorite languages, C# and Ruby. So my question has two parts: 1) Can Haxe interop with flash components (swc files)? Like for instance if i use the Flash IDE to skin some controls, can i import those controls and use them in Haxe? 2) Are there any performance benefits to the Haxe

For those of you experienced in both Haskell and some flavor of Lisp, I'm curious how "pleasant" (to use a horrid term) it is to write code in Haskell vs. Lisp. Some background: I'm learning Haskell now, having earlier worked with Scheme and CL (and a little foray into Clojure). Traditionally, you could consider me a fan of dynamic languages for the succinctness and rapidity they provide. I quickly fell in love with Lisp macros, as it gave me yet another way to avoid verbosity and boilerplate. I'm finding Haskell incredibly interesting, as it's introducing me to ways of coding I didn't know

I'm learning PHP5 (last time I checked PHP was in PHP4 days) and I'm glad to see that PHP5 OO is more Java-alike than the PHP4 one but there's still an issue that makes me feel quite unconfortable because of my Java background : ARRAYS. I'm reading "Proffesional PHP6" (Wrox) and It shows its own Collection implementation. I've found other clases like the one in http://aheimlich.dreamhosters.com/generic-collections/Collection.phps based on SPL. I've also found that there's some kind of Collection in SPL (ArrayObject) However, I'm surprised because I don't really see people using Collections in