Ruby 数组length()函数

Array#length() : length() 是一个数组类的方法，用于返回数组中元素的数量。

语法。Array.length()

参数。数组

返回：数组中的元素数量。

例子 #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"

输出:

length() method form : 6

length() method form : 6

length() method form : 4

例子 #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"

输出:

length() method form : 3

length() method form : 3

length() method form : 2