Re: How do I find the size of an array?


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Re: How do I find the size of an array?

by usless_blonde (Initiate)

on Oct 14, 2003 at 12:53 UTC ( [id://299087]=note: print w/replies, xml )

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in reply to How do I find the size of an array?

Just to be reaaly stupid. What does $#array mean?
I can't do that as everything after the # is ignored!

{QandAEditor note-- Summarizing a followup to this node: $#array is the index of the last element in @array. #, in this case, doesn't begin a comment.

$#array is not necessarily equal to scalar @array - 1. Use @array in scalar context to determine the size of an array. Use $#array when determining the index number of the last element of @array. }

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Re: Answer: How do I find the size of an array?
by DrHyde (Prior) on Oct 14, 2003 at 15:23 UTC

For example, if you have @array = qw(ant bat cat dog eagle fish ghoti) then $#array is 6 (the index of 'ghoti'). The number of elements in the array is usually $#array + 1.

Note that those values will change if $[ is set to anything other than 0. To cope with those times when someone has been naughty (use of $[ is strongly discouraged), you should get the number of elements in an array by evaluating @array in scalar context, such as: