>>>>> "AA" == Alex Aminoff <[email protected]> writes:
AA> On Tue, 25 May 2010, Uri Guttman wrote: >> so that is 6 ways to do it without eval and tied. :) AA> Thanks, I did in fact consider, and in a couple cases implement, all AA> of those possible solutions, but was not happy with any of them. AA> Basically, either the template is too cluttered: AA> <a href="[%url%]">[%title%]</a>... AA> or I am using regexp replacement. I suppose I trust perl's parser and AA> variable interpolation more than my own, which is why I like eval. you should NOT like eval. it is very dangerous and overkill for this. eval should be a last resort when no other reasonable solution can be found. it is not a basic tool but only meant for advanced things because of its danger. AA> I won't know the names of the methods until run-time since I am AA> building a general purpose utility that can be used with any object. so? you need to deal with that issue regardless of interpolation as i pointed out before. AA> If we don't like eval I might be able to use String::Interpolate AA> instead, though honestly I have read their documentation 3 times now AA> and still don't precisely understand it. AA> Broadly, what I want to do is almost what is described here: AA> http://dev.perl.org/perl6/rfc/222.html AA> except that I have one object on which all the methods will be called, AA> so no need to repeat the object many times. repeat the object? show some example code of what you mean. AA> Possibly that means I can "use v6" and get what I want, although I AA> have not read up on what else that would change AA> backwards-incompatibly. it means you are dependent on v6 modules. not a killer if you don't need to worry about older perls. AA> So it sounds like the best practice would be to go back to my own AA> regexp substitution. Hm. Is there perhaps a packaged regexp somewhere AA> that finds and replaces exactly the same strings of the form $abcd AA> that the perl parser would? again, one of my solutions is fine. try the hash one and straight interpolation. you can code up a loop to make many method calls and store the results in the hash. then the string is easy to create and interpolate. or even use a bunch of scalars if there aren't too many. you haven't shown enough user code or requirements to help us make a best practice selection. uri -- Uri Guttman ------ [email protected] -------- http://www.sysarch.com -- ----- Perl Code Review , Architecture, Development, Training, Support ------ --------- Gourmet Hot Cocoa Mix ---- http://bestfriendscocoa.com --------- _______________________________________________ Boston-pm mailing list [email protected] http://mail.pm.org/mailman/listinfo/boston-pm
