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Think about Loose Coupling

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I've glanced at Ruby before, probably after someone remarked on how clean it is. I just took another look this afternoon, and was once again found myself ready to abandon the attempt without doing anything useful, for the usual reasons:
  • Lack of documentation: If I write a method that takes a block, how do I then pass that block on to another method? The introductory guides give examples, but no general rules for how blocks work. After a bit of searching, I found the Pragmatic Programmers' guide which, although good, appears to be at least a year out of date. And I still haven't found the answer, though I'm not done searching. Then again, maybe I'm just slow or something.
  • Hackishness: The syntax is usually clean, friendly, DWIM, and the like. But when you look at some of the corner cases, it gets frightening. Take a look at this from the doc:
    When Ruby sees a name such as ``a'' in an expression, it needs to determine if it is a local variable reference or a call to a method with no parameters. To decide which is the case, Ruby uses a heuristic. As Ruby reads a source file, it keeps track of symbols that have been assigned to. It assumes that these symbols are variables. When it subsequently comes across a symbol that might be either a variable or a method call, it checks to see if it has seen a prior assignment to that symbol. If so, it treats the symbol as a variable; otherwise it treats it as a method call.
    So if I add a local variable "foo", it can silently mask subsequent calls to a function "foo" that I've been happily calling for a month? Yikes. Sure, Perl has some wierd things going on in places, but they mostly just show up in golf games.
Don't get me wrong -- it's a fun, interesting language; if you squint a bit, it's clean at a higher level. But it still seems like a hack, not a solid foundation for software. I wouldn't trust it with my file system.


In reply to (OT -- ruby) Re: Re: Favorite programming language, other than Perl: by educated_foo
in thread Favorite programming language, other than Perl: by Petruchio

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