25 lines
744 B
Ruby
25 lines
744 B
Ruby
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# frozen_string_literal: true
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# Description: This program reverses array elements by swapping the first half part of the array
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# Time Complexity : O(n/2), where n is the array size
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# Auxiliary Space : O(1)
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module Arrays
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def self.reverse_array(arr)
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n = arr.length
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mid = n / 2
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(0...mid).each { |i| arr[i], arr[n - i - 1] = arr[n - i - 1], arr[i] }
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arr
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end
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end
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RSpec.describe Arrays do
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describe '.reverse_array' do
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it 'reverses the elements of an array' do
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expect(Arrays.reverse_array([1, 2, 3, 4, 5])).to eq([5, 4, 3, 2, 1])
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expect(Arrays.reverse_array([1, 2, 3, 4])).to eq([4, 3, 2, 1])
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expect(Arrays.reverse_array([1])).to eq([1])
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expect(Arrays.reverse_array([])).to eq([])
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end
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end
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end
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