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

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??
JavaFan,
It's not really necessary to do so in Perl...

Probably why I have never adopted it. That doesn't mean that there aren't people out there recommending it. For those following along at home, perl doesn't always issue a warning with the assignment operator in a conditional:

#!/usr/bin/perl use strict; use warnings; if (my $foo = foo()) { print "No warning\n"; } if (my @asdf = (1..5)) { print "No warning here either\n"; } if (my $bar = {one => 1}) { print "Look Ma, no warning\n"; } while (my $rec = <DATA>) { # ... } sub foo { return 42; }

Of these, the only suspect one is the first and perl assumes you know what you are doing. Writing it with the operands reversed would have generated an error (assuming no lvalue attributes) but I agree, this is a stretch.

You have re-inforced my two points. A lesson learned the hard way is learned best and there is no substitute for experience but figuring out how much of other's experience to rely on is tricky.

Cheers - L~R


In reply to Re^3: Avoiding silly programming mistakes by Limbic~Region
in thread Avoiding silly programming mistakes by missingthepoint

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



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

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

How do I use this?Last hourOther CB clients
Other Users?
Others making s'mores by the fire in the courtyard of the Monastery: (9)
As of 2024-03-28 09:39 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found