Ruby Array none?()用法及代码示例

Array＃none？()：none？()是一个Array类方法，它检查数组是否为空。

用法：Array.none?()

参数：数组

返回：true-如果数组没有元素，否则返回false

范例1：

# Ruby code for none?() method 
  
# declaring array 
a = [18, 22, 33, nil, 5, 6] 
  
# declaring array 
b = [1, 4, 1, 1, 88, 9] 
  
# declaring array 
c = [] 
  
# none? method example 
puts "none?() method form:#{a.none?()}\n\n"
  
puts "none?() method form:#{b.none?()}\n\n"
  
puts "none?() method form:#{c.none?()}\n\n"

输出：

none?() method form:false

none?() method form:false

none?() method form:true

范例2：

# Ruby code for none?() method 
  
# declaring array 
a = ["abc", "nil", "dog"] 
  
# declaring array 
c = [nil] 
  
# declaring array 
b = ["cow", nil, "dog"] 
  
  
# none? method example 
puts "none?() method form:#{a.none?()}\n\n"
  
puts "none?() method form:#{b.none?()}\n\n"
  
puts "none?() method form:#{c.none?()}\n\n"

输出：

none?() method form:false

none?() method form:false

none?() method form:true

相关用法

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 none?() function。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。