With a name like
each_cons, I thought you were going to iterate through all the
permutations of how I could
construct a list
you operated upon. For example, I thought
[1,2,3,4].each_cons do |x| # I did not notice the required argument
puts x.inspect
end
would output:
[[1,2,3,4], []]
[[1,2,3], [4]]
[[1,2], [3,4]]
[[1], [2,3,4]]
[[], [1,2,3,4]]
So when I needed to find the local maxima in an image projection to
algorithmically find the staves in sheet music, I
found myself wanting a C-style
for loop.
I didn't know you'd provide me with a wonderful sliding window!
[1,2,3,4].each_cons(2) do |x|
puts x.inspect
end
[1, 2]
[2, 3]
[3, 4]
From now on, I'll turn to you when I need that functionality. Thanks for waiting
on me,
each_cons. Not everyone would be as patient as you.
Warm Regards,
Sam
PS: In case you're interested, the "cons" in "each_cons" is short for "consecutive," not "construct," as
Matz informed me:
Hey! Why don't you make your life easier and subscribe to the full post
or short blurb RSS feed? I'm so confident you'll love my smelly pasta plate
wisdom that I'm offering a no-strings-attached, lifetime money back guarantee!
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