in reply to RE: RE: Writing the contents of an array to a file
in thread Writing the contents of an array to a file

FYI, $" is to print "@list" as $, is to print @list or print $a, $b, $c 
@a = qw{ one two };
@b = qw{ tre for };
{
   local $" = "-";
   print "@a @b";        # one-two tre-for
}
{  local $, = "-";
   print @a, @b;         # one-two-tre-for
   local $" = ":";
   print "@a", "@b";     # one:two-tre:for
}

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Cheers

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(tye)RE: Writing the contents of an array to a file
by tye (Sage) on Sep 29, 2000 at 00:06 UTC

    Note also that while each pair of lines of code below produce the same output: 

        print FILE "@array";
    print FILE join $", @array;

    print FILE @array;
    print FILE join $,, @array;

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    they are not equivalent in terms of performance. Only print FILE @array avoids building a potentially huge string in memory before writing. In practice, the speed improvement is usually small (or even negative) but I prefer to allow for huge arrays and avoid the join if I'm just going to write the result to a file and then throw the constructed string away.

    Though I do find appealing the way that using join prevents your code from breaking if you accidentally sneak a scalar context into the mix (typing a "." when you meant a ",", for example).

            - tye (but my friends call me "Tye")
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