Ruby Array rotate!()函数

Array#rotate!() : rotate!() 是一个数组类的方法，它可以返回原地旋转的自我，使计数处的元素先出现，并返回自我。

语法。Array.rotate!()

参数。数组

返回： 将自身旋转到位，使计数处的元素先出现，并返回自身。

例子 #1 :

# 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"

输出:

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]

例子 #2 :

# 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"

输出:

rotate!() method form : ["nil", "dog", "abc"]

rotate!() method form : ["dog", "cow", nil]

rotate!() method form : [nil, "cat"]