Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??

Beyond performance improvement, some of these transformations usually render your code "more correct" (for some suitable definition of correct). Your first point, for example, about unnecessarily quoting variables: in my experience, it's a left-over bad habit of shell programmers. It can lead to errors in strange circumstances, particularly if $foo is an object, and the stringify operator does something you didn't expect, or you didn't realize the stringified version is not the same as the object itself.

More than optimizations, I would categorize these as "Refactoring". Generally speaking, it means changing code without adding functionality, but improving it in some fashion, such as making it easier to maintain. Fowler has an entire book on the subject. Although it uses Java, some of the principles apply to other languages as well.

I recall brother chromatic was working on a refactoring editor for Perl, based on using the B back-end compilers to generate a uniform code tree, then applying these types of changes. He referred to it in his journal on use perl, but I don't know its current state (though I'm sure it'll be thoroughly tested when it's released ;-).


In reply to Re: Idiomatic optimizations by VSarkiss
in thread Idiomatic optimizations by Juerd

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others meditating upon the Monastery: (7)
    As of 2014-08-01 05:35 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      My favorite superfluous repetitious redundant duplicative phrase is:









      Results (256 votes), past polls