Ruby Array count()用法及代碼示例

Array＃count()：count()是一個Array類方法，它返回數組中元素的數量。它還可以找到數組中特定元素的總數。

用法： Array.count()

參數：  obj - specific element to found

返回： removes all the nil values from the array.

代碼＃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"

輸出：

counting:6

counting:3

counting:2

代碼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"

輸出：

counting:3

counting:0

counting:2

相關用法

注：本文由純淨天空篩選整理自mayank5326大神的英文原創作品 Ruby | Array count() operation。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。