From: Martin Pirker <nospam@...>
Date: 2004-04-21T10:29:07+09:00
Subject: efficient collect+compact ?

Hello...

What's the most efficient way for

puts [1,2,3,4,5,6,7,8,9,10].collect{ |x| next if x % 2 == 0; x+10 }.compact
or
puts [1,2,3,4,5,6,7,8,9,10].collect!{ |x| next if x % 2 == 0; x+10 }.compact!


Or:
I want to iterate over all array elements, process them, decide
whether the result is any good, and keep only the good ones.
It's ok doing that by chaining collect+compact, but I ponder this must
be slow/inefficient for array with xxxxx elements.

I read Array and Enumerable docs, have I missed something[1] or does
a straight "collect everything but nil" function not exist?


Martin

[1]
(it's already past 3am but I remember searching the same thing sometime ago)