language-comparisons

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Closed 6 years ago . Locked . This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new answers or interactions. I've searched on the Internet for comparisons between F# and Haskell but haven't found anything really definitive. What are the primary differences and why would I want to choose one over the other? 回答1: Haskell

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Closed 6 years ago . Locked . This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new answers or interactions. I've searched on the Internet for comparisons between F# and Haskell but haven't found anything really definitive. What are the primary differences and why would I want to choose one over the other? 回答1: Haskell

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Closed 6 years ago . Locked . This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new answers or interactions. I've searched on the Internet for comparisons between F# and Haskell but haven't found anything really definitive. What are the primary differences and why would I want to choose one over the other? 回答1: Haskell

问题 Is there an equivalent of Python str.format in PHP? In Python: "my {} {} cat".format("red", "fat") All I see I can do in PHP natively is by naming the entries and using str_replace : str_replace(array('{attr1}', '{attr2}'), array('red', 'fat'), 'my {attr1} {attr2} cat') Is there any other PHP's native alternatives? 回答1: sprintf is the closest thing. It's the old-style Python string formatting: sprintf("my %s %s cat", "red", "fat") 回答2: As PHP doesn't really have a proper alternative to str

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 6 years ago . 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

问题 Background Perl and Ruby have the __END__ and __DATA__ tokens that allow embedding of arbitrary data directly inside a source code file. Although this practice may not be well-advised for general-purpose programming use, it is pretty useful for "one-off" quick scripts for routine tasks. Question: What other programming languages support this same or similar feature, and how do they do it? 回答1: Perl supports the __DATA__ marker, which you can access the contents of as though it were a regular

问题 I program in PHP mostrly and Ruby sometimes I happen to be in need of a way to implements those "hash arguments" into my PHP funcions (Like, say, an HTML select helper) draw_select :name => :id, :onclick => 'alert(this.value)' The problem in PHP is that I would have to define an argument order to implement many possible attributes. I have been thinking of just define 1 string argument and use json_decode() so i can pass arguments like this: draw_select("'name': 'id', 'onclick': 'alert(this

问题 In Lisp, you can have something like this: (setf my-stuff '(1 2 "Foo" 34 42 "Ni" 12 14 "Blue")) (format t "~{~d ~r ~s~%~}" my-stuff) What would be the most Pythonic way to iterate over that same list? The first thing that comes to mind is: mystuff = [1, 2, "Foo", 34, 42, "Ni", 12, 14, "Blue"] for x in xrange(0, len(mystuff)-1, 3): print "%d %d %s" % tuple(mystuff[x:x+3]) But that just feels awkward to me. I'm sure there's a better way? Well, unless someone later provides a better example, I

问题 Does C++ offer something similar to Ada's subtype to narrow a type? E.g.: type Weekday is (Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday); subtype Working_Day is Weekday range Monday .. Friday; 回答1: No, not natively. What you describe might be best represented as a scoped enum, accompanied by a separate scoped enum with a subset of enumerations who share numerical representations with the "parent" scoped enum. You could further define some conversions between the two, but

问题 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