Created
April 18, 2011 23:35
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Reverse an array in Ruby without .reverse
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| i = 0 | |
| j = array.length - 1 | |
| while i < j do | |
| last = array[j] | |
| first = array[i] | |
| array[i] = last | |
| array[j] = first | |
| i += 1 | |
| j -= 1 | |
| end | |
| puts array |
def reverse(a)
a.length.times do |i|
a.insert(i, a.pop)
end
end
def reverse_array(arr)
length = arr.length
half_length = length / 2
(0...half_length).each do |i|
# Swap elements from the beginning and end of the array
arr[i], arr[length - 1 - i] = arr[length - 1 - i], arr[i]
end
return arr
end
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def reverse(array)
rev = []
rev << array.pop until array.empty?
rev
end