--- Smylers <[EMAIL PROTECTED]> wrote: > David Storrs wrote: > > > On Fri, Jan 03, 2003 at 10:58:49AM -0800, Mr. Nobody wrote: > > > > > --- Smylers <[EMAIL PROTECTED]> wrote: > > > > > > > junction should be sufficient: > > > > > > > > print "date" if $var == any(1 .. 31); > > > > > > Superpositions in the core? You're kidding, right? > > Yeah, somehow they just slipped right in there without anybody on this > mailing list really noticing -- and certainly without any long threads > discussing the syntax for their operator incarnations and the knock-on > effect that could have on other operators ...
I looked through the p6l archives, there really wasn't much discussion about it. > > What's wrong with "if 1 <= $var <= 31"? > > > > ...nothing. If you like it, by all means use it. But, (1) TIMTOWTDI, > > (2) Smyler's version is more visually concise (although, granted, it > > actually takes a few extra chars), (3) Smyler's version puts the > > variable (the important thing in the expression) on the left instead > > of the in the middle, and (4) IMHO, Smyler's version reads better as > > English. It's also far slower. Constructing a 31-element list, junctionizing it, then testing against each element vs. 2 numeric comparisons. I know where my money is... > Those are stylistic things, and to some degree a matter of taste. More > importantly the junction version -- or even better, the smartmatch > version as pointed out by Chris Dutton -- work for arbitrary sets, not > just ranges of consecutive values. Wanting to do this for arbitrary lists dosen't need junctions. "if grep $_ == $var, @mylist" suffices. __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com
