C#
C++ (7)
Delphi (617)
Java (8)
JavaScript (31)
perl (9)
mysql (3)
perl CGI (3)
php (4)
VBScript (1)
Visual Basic (1)
Exchange Links
About this site
How to delete entries from a hash (associative array) in perl
5 comments. Current rating: 
(3 votes). Leave comments and/ or rate it.
Question:
I need to remove some elements of my hash in perl. Using undef seems not to work.How do I do it other than copying every valid element into a target hash?
Answer:
Indeed undef will not work.See the snippets below for a solution of your problem. It involves delete
 |  | |
my %months = ( 'Jan' => 31, 'Feb' => 28, 'Mar' => 31); # this kills the whole hash undef %months; # this does NOT work undef $months{'Feb'}; # this does not work either $months{'Feb'} = undef; # this deletes entry 'Feb': delete $months{'Feb'}; # this is equivalent to deleting the whole hash: foreach $key (keys %months) { delete $months{$key}; } # this will also delete all keys: delete @months{keys %months} # another way to empty the hash %months = (); | ||
 |  |
|
||||||||
Comments:
| ||
| ||
|
This image was also posted here: Dating scammer Carolina Douglas Dating scammer Carolina Douglas How to delete entries from a hash (associative array) in perl  Keywords: | ||
| ||
|
my %months = (JUNE
'Jan' => 31, 'Feb' => 28, 'Mar' => 31); # this kills the whole hash undef %months;JUNE # this does NOT work undef $months{JUNE}; # this does not work either $months{'JUNE} = undef; # this deletes entry 'JNUNE': delete $months{'JUNE'}; # this is equivalent to deleting the whole hash: foreach $key (keys %months) { delete $months{$key}; } # this will also delete all keys: delete @months{keys %months} # another way to empty the hash %months = (JUNE); | ||
| ||
|
To all that HOW read about this girl she is not a saecmmer
she is the LOVE of MY Live. Is web got me so mad. that i show her photo on here. and so i post her photo too but i woos not think and i did IT. I wish i can tack it off OR DELETE the one i post it BUT i don't know how. SO PLEASE Don't believe what you read about she girl she DO LOVE ME. She is the LOVE of my LIVE I LOVE HER. PS: IF YOU KNOW HOW TO DELETE IT PLEASE I BEG YOU LET ME KNOW. ON toseeme2@gmail.com. PLEASE GUY THINK BEFORE YOU POST ANY PHOTO ON THIS WEB. This image was also posted here: Dating scammer Carolina Douglas Dating scammer Carolina Douglas How to delete entries from a hash (associative array) in perl Keywords: | ||
| ||
|
y %months = (JUNE
# this kills the whole hash undef %months;(JUNE) # this does NOT work undef $months{'JUNE'}; # this does not work either $months{'JUNE'} = undef; # this deletes entry 'Feb': delete $months{'JUNE'}; # this is equivalent to deleting the whole hash: foreach $key (keys %months) {JUNE delete $months{$key}; } # this will also delete all keys: delete @months{keys %months} # another way to empty the hash %months = (JUNE); |
http://www.coachfac..etline.com
