Ruby | Array rotate!() function
Last Updated :
06 Dec, 2019
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 :
a = [ 18 , 22 , 33 , nil , 5 , 6 ]
b = [ 1 , 4 , 1 , 1 , 88 , 9 ]
c = [ 18 , 22 , 50 , 6 ]
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"
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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 :
a = [ "abc" , "nil" , "dog" ]
c = [ "cat" , nil ]
b = [ "cow" , nil , "dog" ]
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"
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Output :
rotate!() method form : ["nil", "dog", "abc"]
rotate!() method form : ["dog", "cow", nil]
rotate!() method form : [nil, "cat"]
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