Ruby Array rotate!()用法及代碼示例

Array＃rotate！()：rotate！()是一個Array類方法，該方法返回在原處旋轉的self，以便count的元素首先出現，然後返回self。

用法：Array.rotate!()

參數：數組

返回：將self旋轉到位，以便指定元素首先出現，然後返回self。

範例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"

輸出：

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]

範例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"

輸出：

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

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

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

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