Ruby Array one?()用法及代碼示例

Array＃one？()：one？()是一個Array類方法，它檢查數組是否隻有一個數組元素。

用法：Array.one?()

參數：數組

返回：true-如果數組隻有一個元素，否則返回false。

範例1：

# Ruby code for one?() method 
  
# declaring array 
a = [18, 22, 33, nil, 5, 6] 
  
# declaring array 
b = [1, 4, 1, 1, 88, 9] 
  
# declaring array 
c = [2] 
  
# one? method example 
puts "one?() method form:#{a.one?()}\n\n"
  
puts "one?() method form:#{b.one?()}\n\n"
  
puts "one?() method form:#{c.one?()}\n\n"

輸出：

one?() method form:false

one?() method form:false

one?() method form:true

範例2：

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

輸出：

one?() method form:false

one?() method form:false

one?() method form:true

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 one?() function。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。