Ruby | reverse function

The reverse function in Ruby is used to reverse the input array into another new array and keep the input array as it is before.

Syntax: Array.reverse
Here Array is the input array whose elements are to be reversed.

Parameters: This function does not accept any parameters.

Returns: the another new array of reversed elements of the input array.

Example 1:

# Initializing some arrays of elements
Array1 = ["a", "b", "c", "d"]
Array2 = []
Array3 = [1]
Array4 = [1, 2]
Array5 = ["Ram", "Geeta", "Shita"]

# Calling to reverse function
A = Array1.reverse
B = Array2.reverse
C = Array3.reverse
D = Array4.reverse
E = Array5.reverse

# Printing the new reversed array
puts "#{A}"
puts "#{B}"
puts "#{C}"
puts "#{D}"
puts "#{E}"

Output:

["d", "c", "b", "a"]
[]
[1]
[2, 1]
["Shita", "Geeta", "Ram"]

Example 2:

# Initializing some arrays of elements
Array1 = ["a", "b", "c", "d"]
Array2 = []
Array3 = [1]
Array4 = [1, 2]
Array5 = ["Ram", "Geeta", "Shita"]

# Calling to reverse function
A = Array1.reverse
B = Array2.reverse
C = Array3.reverse
D = Array4.reverse
E = Array5.reverse

# Printing original input array
puts "#{Array1}"
puts "#{Array2}"
puts "#{Array3}"
puts "#{Array4}"
puts "#{Array5}"

Output:

["a", "b", "c", "d"]
[]
[1]
[1, 2]
["Ram", "Geeta", "Shita"]

Note: In the above example, it can be seen that after calling the reverse function it reverse the original input array into another array and keep the original array as it is before.

Reference: https://devdocs.io/ruby~2.5/array#method-i-reverse