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how to reverse array in ruby

# ruby
arr = [0,1,2]
# reverse
arr_rev = arr.reverse
# arr_rev = [2,1,0]; arr = [0,1,2]
arr == arr_rev.reverse!
# true
# ! immediately changes the value and stores it back to the variable
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reverse order array ruby

[1,2,3,4].reverse
# [4,3,2,1]
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