Beefy Boxes and Bandwidth Generously Provided by pair Networks
P is for Practical

Comment on

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

If "=~ is the pattern applying operator", then code like if( /foo/ ) would never apply the regex. The two sides of =~ are *not* passed to some built-in function as arguments. The right-hand side is what is run and the left-hand side is the argument if it is present. An "unbound" regex still gets applied. Matching happens even without =~.

The =~ (mostly) is *not* what makes pattern matching happen. The regex is what makes pattern matching happen and the =~ (if present) binds a string to the regex to tell it what to match against (other than the default).

Now, if you have =~ with something that isn't a regex to its right, then you have rather bizarre code and are at the mercy of dubious "do what I mean" guessing. If Perl happens to currently insert a regex constructor for you, my main reaction is that I know I have no code that relies on such.

So the reason we say 'bind' is because one side is the code to run. Like '(' is used to bind arguments to a function -- '(' is not "the function invoking operator", despite that description being somewhat appropriate.

- tye        

In reply to Re^4: Why do we say the =~ operator "binds"? (unapplied?) by tye
in thread Why do we say the =~ operator "binds"? by Cody Pendant

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 romping around the Monastery: (6)
    As of 2018-04-19 16:27 GMT
    Find Nodes?
      Voting Booth?