Re: GetOptions and help

It'ds clearly written into Getopt::Long documentation:

Trouble Shooting
       GetOptions does not return a false result when an option is not
+ sup-
       plied

       That's why they're called 'options'.
[download]

So if you want to make some option mandatory, you'll have to check it by yourself :

usage() unless $res;
[download]

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Re^2: GetOptions and help by Anonymous Monk on Mar 16, 2006 at 12:31 UTC
None of the options are mandatory and I don't want them to be. Hence the question still remains . Unless you are suggesting that I have to check for each arguments existence e.g. `usage() unless $res or $mod or $upd` [download] This seems an untidy way to do it ?	[reply] [d/l]
Re^3: GetOptions and help by fishbot_v2 (Chaplain) on Mar 16, 2006 at 12:59 UTC
If none of the options are mandatory, why would you print usage in the second case?	[reply]
Re^4: GetOptions and help by chargrill (Parson) on Mar 16, 2006 at 13:15 UTC
I think the OP means "at least one option is mandatory", not "no options are mandatory". --chargrill `$,=42;for(34,0,-3,9,-11,11,-17,7,-5){$.=pack'c'=>$,+=$_}for(reverse s +plit//=>$ ){$%++?$ %%2?push@C,$_,$":push@c,$_,$":(push@C,$_,$")&&push@c,$"}$C[$# +C]=$/;($#C >$#c)?($ c=\@C)&&($ C=\@c):($ c=\@c)&&($C=\@C);$%=$\|;for(@$c){print$_^ +$$C[$%++]}` [download]	[reply] [d/l]
Re^4: GetOptions and help by Anonymous Monk on Mar 16, 2006 at 13:26 UTC
If I am presented with a program and I don't know what it does or what options are available, I can hazard a guess that there's some kind of help for it. I'd use -h (or perhaps -?) in the first instance and if that didn't work just run the program and see what happens. If nothing is displayed in the second instance I'm none the wiser , hence the requirement to display a help screen .	[reply]