print array with separator?
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From: Ben Morrow on 25 Jan 2010 18:11 Quoth Peng Yu <pengyu.ut(a)gmail.com>: > @array=("a", "b", "c"); > print "@array\n"; > > The above code will not print a separator (say a newline) between the > elements. I could use a foreach loop to do so. But I feel that there > might be a more convenient way. Could somebody let me know if there is > one? See $" in perlvar, and remember to restrict the scope of any changes with local. Ben
From: Brad Baxter on 25 Jan 2010 20:36 On 1/25/2010 5:25 PM, Peng Yu wrote: > @array=("a", "b", "c"); > print "@array\n"; > > The above code will not print a separator (say a newline) between the > elements. I could use a foreach loop to do so. But I feel that there > might be a more convenient way. Could somebody let me know if there is > one? > > foreach (@array) { > print; > print "\n"; > } The above code positively does printer a separator (a space) between the elements. Change $" to the separator you want. use warnings; use strict; my @array=("a", "b", "c"); print "@array\n"; $" = "\n"; print "@array\n"; -- Brad
From: John Bokma on 25 Jan 2010 21:37 "John W. Krahn" <someone(a)example.com> writes: > John Bokma wrote: >> >> and one I which I don't like much: >> >> map { print "$_\n" } @array; > > Because it *should* be: > > print map "$_\n", @array; Duh, that one is nearly the same as the first one I listed under "other options" ;-) As for *should*, I don't like map in void context but that's nowadays more a matter of taste than anything else as far as I know. I wouldn't use it though, but like Abigail, IIRC, once wrote, there is no reason to have a problem with map in void context because we use other functions in void context without problems (like print). -- John Bokma j3b Hacking & Hiking in Mexico - http://johnbokma.com/ http://castleamber.com/ - Perl & Python Development
From: Uri Guttman on 25 Jan 2010 23:23 >>>>> "JB" == John Bokma <john(a)castleamber.com> writes: JB> I wouldn't use it though, but like Abigail, IIRC, once wrote, there is JB> no reason to have a problem with map in void context because we use JB> other functions in void context without problems (like print). the point with map in void context is not efficiency but in conveying meaning to the reader. map is intended to generate a list, not execute side effects. for modifier does the same thing and is meant for side effects as it doesn't generate a list. perl has many related things like this and you should choose the one with better semantics for your intentions. map generates lists so use it that way. for modifier doesn't generate lists so use it for side effects. uri -- Uri Guttman ------ uri(a)stemsystems.com -------- http://www.sysarch.com -- ----- Perl Code Review , Architecture, Development, Training, Support ------ --------- Gourmet Hot Cocoa Mix ---- http://bestfriendscocoa.com ---------
From: Dr.Ruud on 26 Jan 2010 04:38
Peng Yu wrote: > @array=("a", "b", "c"); 1. "array" is the stupidest name for an array. 2. whitespace is cheap 0. use strict; use warnings; my @word = qw/ a b c /; my @word = "a" .. "c"; -- Ruud |