CGI/Perl Guide | Learning Center | Forums | Advertise | Login Site Search: in Perl Guide PerlGuru Forums Learning Ctr

	MAIN INDEX	SEARCH POSTS	WHO'S ONLINE	LOG IN

Home: Fun With Perl: Perl Quizzes - Learn Perl the Fun Way: undef(); and delete();

sleuth Enthusiast Dec 12, 2000, 1:45 PM Post #1 of 3 (26678 views) undef(); and delete(); Can't Post $hash{'key'} = "value"; What is the difference between undef($hash{'key'}); and delete($hash{'key']); ? Sleuth

perlplexer Deleted Dec 13, 2000, 6:13 AM Post #2 of 3 (26666 views) Re: undef(); and delete(); [In reply to] Can't Post 1) delete($hash{'key'}); - deletes both the key and the value from %hash returning the deleted value. exists($hash{'key'}) returns false 2) undef($hash{'key'}); - simply undefs the value that is associated with 'key' exists($hash{'key'}) returns true

sleuth Enthusiast Dec 13, 2000, 12:06 PM Post #3 of 3 (26657 views) Re: undef(); and delete(); [In reply to] Can't Post   Perfect Score!!!! You hit it right in the mark, that's exactly what I was getting at. If you undef the hash key, exists($hash{'key'}); returns true. Great job perlplexer, Sleuth

Announcements     PerlGuru Announcements Perl Programming Help     Frequently Asked Questions     Beginner     Intermediate     Advanced     Regular Expressions     mod_perl     DBI     Win32 Programming Help Fun With Perl     Perl Quizzes - Learn Perl the Fun Way     Perl Golf     Perl Poetry Need a Custom or Prewritten Perl Program?     I need a program that...     I Need a Programmer for Freelance Work     Throw Down The Gauntlet General Discussions     General Questions     Feedback     Tutorial/Article Suggestions for The Learning Cent     Internet Security Other Programming Languages     Javascript     PHP

Search this forum this category all forums for All words Any words Whole Phrase (options)

Powered by Gossamer Forum v.1.2.0

Web Applications & Managed Hosting Powered by Gossamer Threads
Visit our Mailing List Archives