Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?

Comment on

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

Why does Perl have while when we have if / goto? They can both do the same thing, right?

Just because you can shoehorn some construct into doing something else does not mean that that it is the best tool for the job. It may not be the clearest indication of the programmers intent, may cause confusion with a person later reading the code, and so on. To me, there would be a disconnect between the for / when, and every time I would read it, there would be a short time where I would have to do a mental switch between "this is a loop" and "this is a set of choices based on a value". For the given / when, I would immediately be expecting a set of choices.

There is also a false assertion in your question - that the two constructs do the same thing. See the output for perl -MO=Terse ... for the two samples given. moritz has gone into some of the differences between them in his post.


In reply to Re: given and for by MidLifeXis
in thread given and for by GlitchMr

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!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • 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
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            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?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others perusing the Monastery: (2)
    As of 2017-12-16 23:07 GMT
    Find Nodes?
      Voting Booth?
      What programming language do you hate the most?

      Results (459 votes). Check out past polls.