Also non-destructively: 
my @myMainArray = 
    map { [ $myArray[$_] .. $myArray[$_+4] ] } 
    grep { !($_ % 5) } 0 .. $#myArray;

[download]
That assumes the list has at least 5 elements and is exactly divisible by 5. Otherwise: 
my @myMainArray = 
    map  { 
        exists $myArray[ $_+4 ] 
        ? [ $myArray[$_] .. $myArray[$_+4] ] 
        : [ $myArray[$_] .. $myArray[-1] ] 
    } 
    grep { !($_ % 5) } 0 .. $#myArray;

[download]

In reply to Re: how to seperate array after a certain number of elements? by un-chomp
in thread how to seperate array after a certain number of elements? by adrive

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