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Here is one approach:

#! perl use Modern::Perl; use Data::Dump; my @array1 = ( undef, undef, 'abcd', 'efgh', undef, undef, 'jklm', 'nopq', undef, undef, ); my @array2 = split /\0\0/, join('', map { $_ // "\0" } @array1); @array2 = @array2[1 .. $#array2] unless $array2[0]; dd @array1; dd @array2;


21:38 >perl ( undef, undef, "abcd", "efgh", undef, undef, "jklm", "nopq", undef, undef, ) ("abcdefgh", "jklmnopq") 21:38 >

Update 1: The above assumes that “blank” means undef. If it means '' (the empty string), then change the expression:

map { $_ // "\0" } @array1


map { $_ || "\0" } @array1
map { $_ eq '' ? "\0" : $_ } @array1

30th January, 2013. Amended to address the problem noted by The Perlman, below.

Update 2: As with muba’s solution below, the above assumes that the array begins with a double blank.

Hope that helps,

Athanasius <°(((><contra mundum Iustus alius egestas vitae, eros Piratica,

In reply to Re: Clubbing array elements together: by Athanasius
in thread Clubbing array elements together: by newbie1991

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