Ruby | Array rotate!() function Last Updated : 06 Dec, 2019 Comments Improve Suggest changes Like Article Like Report Array#rotate!() : rotate!() is a Array class method which returns self rotated in place so that the element at count comes first, and returns self. Syntax: Array.rotate!() Parameter: Array Return: self rotated in place so that the element at count comes first, and returns self. Example #1 : Ruby # Ruby code for rotate!() method # declaring array a = [18, 22, 33, nil, 5, 6] # declaring array b = [1, 4, 1, 1, 88, 9] # declaring array c = [18, 22, 50, 6] # rotate! method example puts "rotate!() method form : #{a.rotate!(1)}\n\n" puts "rotate!() method form : #{b.rotate!(2)}\n\n" puts "rotate!() method form : #{c.rotate!(-1)}\n\n" Output : rotate!() method form : [22, 33, nil, 5, 6, 18] rotate!() method form : [1, 1, 88, 9, 1, 4] rotate!() method form : [6, 18, 22, 50] Example #2 : Ruby # Ruby code for rotate!() method # declaring array a = ["abc", "nil", "dog"] # declaring array c = ["cat", nil] # declaring array b = ["cow", nil, "dog"] # rotate! method example puts "rotate!() method form : #{a.rotate!(1)}\n\n" puts "rotate!() method form : #{b.rotate!(2)}\n\n" puts "rotate!() method form : #{c.rotate!(-1)}\n\n" Output : rotate!() method form : ["nil", "dog", "abc"] rotate!() method form : ["dog", "cow", nil] rotate!() method form : [nil, "cat"] Comment More infoAdvertise with us Next Article Ruby | Array rotate!() function M mayank5326 Follow Improve Article Tags : Ruby Ruby-Methods Ruby Array-class Similar Reads Ruby | Array rotate() function Array#rotate() : rotate() is a Array class method which returns a new array by rotating self so that the element at count is the first element of the new array. Syntax: Array.rotate() Parameter: Array Return: a new array by rotating self so that the element at count is the first element of the new a 2 min read Ruby | Array one?() function Array#one?() : one?() is a Array class method which checks whether the array is having only one array element. Syntax: Array.one?() Parameter: Array Return: true - if array has only one element otherwise return false. Example #1 :Â Ruby # Ruby code for one?() method # declaring array a = [18, 22, 33 1 min read Ruby | Array none?() function Array#none?() : none?() is a Array class method which checks whether the array is empty or not. Syntax: Array.none?() Parameter: Array Return: true - if array has no elements otherwise return false Example #1 : Ruby # Ruby code for none?() method # declaring array a = [18, 22, 33, nil, 5, 6] # decla 1 min read Ruby | Array replace() function Array#replace() : replace() is a Array class method which returns an array of all combinations of elements from all arrays. Syntax: Array.replace() Parameter: Array Return: an array of all combinations of elements from all arrays. Example #1 : Ruby # Ruby code for replace() method # declaring array 2 min read Ruby | Array product() function Array#product() : product() is a Array class method which returns an array of all combinations of elements from all arrays. Syntax: Array.product() Parameter: Array Return: an array of all combinations of elements from all arrays. Example #1 : Ruby # Ruby code for product() method # declaring array 2 min read Ruby | Array <=> function Array#() : () is an Array class method which performs the comparison between the two arrays. Syntax: Array.() Parameter: Array for the comparison Return: 1 : if a > b -1 : if a < b 0 : if a = b Example #1 : Ruby # Ruby code for <=>() method # checking equality # declaring arrays a = [18, 2 min read Ruby | Array pop() function Array#pop() : pop() is a Array class method which checks removes the last element from the array and returns it. Syntax: Array.pop() Parameter: Array Return: removes the last element from the array and returns it. Example #1 : Ruby # Ruby code for pop() method # declaring array a = [18, 22, 33, nil, 1 min read Ruby | Array map() function Array#map() : map() is a Array class method which returns a new array containing the values returned by the block. Syntax: Array.map() Parameter: Array Return: a new array containing the values returned by the block. Example #1 : Ruby # Ruby code for map() method # declaring array a = [18, 22, 33, 3 2 min read Ruby | Array rindex() function Array#rindex() : rindex() is a Array class method which returns the index of the last object in the array. Syntax: Array.rindex() Parameter: Array Return: the index of the last object in the array. if not present then nil Example #1 : Ruby # Ruby code for rindex() method # declaring array a = [18, 2 1 min read Ruby | Array reject!() function Array#reject!() : reject!() is a Array class method which returns a new array containing the values which are not returned by the block. Syntax: Array.reject!() Parameter: Array Return: a new array containing the values not returned by the block. Example #1 : Ruby # Ruby code for reject!() method # 1 min read Like