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Aurora Anderson whiteboard 2 #4
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aurora-answers.rb
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list.length.times do | ||
result << list[rev] | ||
rev -= 1 | ||
end |
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This works and is easy to follow, but if requires iterating through the list twice. Can you think of a way to do this only iterating through the list once? (check the solutions branch for my solution)
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Revision looks good!
aurora-answers.rb
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def switchPairs(list) | ||
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result = [] |
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This solution was supposed to modify the array in place, not create a new copy of the array.
rewrote per your suggestions! |
aurora-answers.rb
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second = list[i+1] | ||
result << second | ||
result << first | ||
list[i], list[i+1] = list[i+1], list[i] |
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Ahh, fun! This is maybe kinda ruby magic (in the sense you can't do this in other languages), but I like it. :)
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