Ruby Array length()用法及代碼示例

Array＃length()：length()是一個Array類方法，它返回數組中元素的數量。

用法：Array.length()

參數：數組

返回：數組中元素的數量。

示例1:

# Ruby code for length() 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] 
  
# length method example 
puts "length() method form : #{a.length()}\n\n"
  
puts "length() method form : #{b.length()}\n\n"
  
puts "length() method form : #{c.length()}\n\n"

輸出：

length() method form : 6

length() method form : 6

length() method form : 4

示例2:

# Ruby code for length() method 
  
# declaring array 
a = ["abc", "nil", "dog"] 
  
# declaring array 
c = ["cat", nil] 
  
# declaring array 
b = ["cow", nil, "dog"] 
  
  
# length method example 
puts "length() method form : #{a.length()}\n\n"
  
puts "length() method form : #{b.length()}\n\n"
  
puts "length() method form : #{c.length()}\n\n"

輸出：

length() method form : 3

length() method form : 3

length() method form : 2

相關用法

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