Ruby Array count()用法及代码示例

Array＃count()：count()是一个Array类方法，它返回数组中元素的数量。它还可以找到数组中特定元素的总数。

用法： Array.count()

参数：  obj - specific element to found

返回： removes all the nil values from the array.

代码＃1：count()方法示例

# Ruby code for count() method 
# to count elements 
  
# declaring array 
a = [18, 22, 33, nil, 5, 6] 
  
# declaring array 
b = [1, 4, 1, 1, 88, 9] 
  
# declaring array 
c = [18, 22, nil, nil, 50, 6] 
  
# counting total elements 
puts "counting:#{a.count}\n\n"
  
# counting 1 
puts "counting:#{b.count(1)}\n\n"
  
# counting 'nil' 
puts "counting:#{c.count(nil)}\n\n"

输出：

counting:6

counting:3

counting:2

代码2：count()方法示例

# Ruby code for count() method 
# to count elements 
  
# declaring array 
a = ["abc", "nil", "dog"] 
  
# declaring array 
b = ["cow", nil, "dog"] 
  
# declaring array 
c = ["cat", nil, nil] 
  
# counting total elements 
puts "counting:#{a.count}\n\n"
  
# counting 1 
puts "counting:#{b.count(1)}\n\n"
  
# counting 'nil' 
puts "counting:#{c.count(nil)}\n\n"

输出：

counting:3

counting:0

counting:2

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注：本文由纯净天空筛选整理自mayank5326大神的英文原创作品 Ruby | Array count() operation。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。