Beefy Boxes and Bandwidth Generously Provided by pair Networks
There's more than one way to do things
 
PerlMonks  

Answer: How do I convert date format between 'DD-MM-YYYY' and 'YYYY-MM-DD' back & forth?

by naikonta (Curate)
on May 08, 2007 at 19:35 UTC ( #614227=categorized answer: print w/replies, xml ) Need Help??

Q&A > dates and times > How do I convert date format between 'DD-MM-YYYY' and 'YYYY-MM-DD' back & forth? - Answer contributed by naikonta

Well, basically, just reverse the date components in the list and put it back as string.
my $in_date = '30-04-2007'; my $db_date = join '-', reverse split '-', $in_date; # to get the original format, do the same thing my $pr_date = join '-', reverse split '-', $db_date; print "in: $in_date; db: $db_date; pr: $pr_date\n"; # in: 30-04-2007; db: 2007-04-30; pr: 30-04-2007
For multi-possible-separator, use the non-digit character class for split().
my $in_date = '02/05/2007'; # or 02.05.2007, or any non-digit-separato +rs my $db_date = join '-', reverse split /\D/, $in_date; # to get the original format, do the same thing as before my $sep = '-'; my $pr_date = join $sep, reverse split '-', $db_date; print "in: $in_date; db: $db_date; pr: $pr_date\n"; # in: 02/05/2007; db: 2007-05-02; pr: 02-05-2007
In this situation, there's no way to convert the date back with its original separator unless you kept it somewhere somehow, if that really matters. Besides, this might be a good chance to enforce your standard separator :-)

  • Comment on Answer: How do I convert date format between 'DD-MM-YYYY' and 'YYYY-MM-DD' back & forth?
  • Select or Download Code
Log In?
Username:
Password:

What's my password?
Create A New User
Chatterbox?
[Corion]: ovedpo15: You could split on comma, and then join everything together, except the last part. Or you could match and make sure that the last part has no comma, like qr!,[^,]+$!, or you could use rindex.
[ovedpo15]: But I don't know the length of the string. will it still work?
[ovedpo15]: The only thing I know is that there is a comma at the end and a value after that
[hippo]: Try it and see. Your computer won't explode.
[Corion]: length will tell you the length of a string.
[Corion]: But if you are parsing CSV, again, let me point to Text::CSV_XS, which you should use instead
[hippo]: +1 for Text::CSV_XS
[ovedpo15]: Im not allowed to use additional modules, so I can't use it. looking for a simple regex to do this task though..
[Corion]: Ah, so this is homework? Then most likely, you should review your course material closer. It would greatly surprise me if the course material wouldn't mention the topics that will be used in the homework...

How do I use this? | Other CB clients
Other Users?
Others perusing the Monastery: (10)
As of 2018-05-27 10:39 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    Notices?