This bit is quite wrong:

my @names = map {$i > 6 ? push(@names,$input2arr[$i]) : $i++ } @input2
+arr;

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Inside the map block (i.e. the bit between { and }) you don't just put the equivalent of what you'd put inside a foreach block. Allow me to demonstrate with a simple example...

my @letters  = ('a', 'b', 'c');
my @capitals;
foreach my $l (@letters) {
  push @capitals, uc($l);
}

[download]

Don't do this:

my @letters  = ('a', 'b', 'c');
my @capitals = map { $i++; push @capitals, uc($letters[$i]) } @letters
+;

[download]

Do this:

my @letters  = ('a', 'b', 'c');
my @capitals = map { uc($_) } @letters;

[download]

What map does basically is to execute the contents of the block on each item in the given list, making a new list from all the results. Note in the above example, the code within the block doesn't need to do any pushing onto @capitals, and it doesn't need to look at @letters - the map function does that for you.

Your particular example can be written as:

my $i = 0;
my @names = map { $i++ > 6 ? ($_) : () } @input2arr;

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Though using grep in this case might be better.

my $i = 0;
my @names = grep { $i++ > 6 } @input2arr;

[download]

Or just use an array slice:

my @names = @input2arr[ 7 .. $#input2arr ];

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perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

In reply to Re: bit of help with map function by tobyink
in thread bit of help with map function by sweepy838

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