带小数位的范围(Range with decimal place)

带小数位的范围(Range with decimal place)

如何检查ruby中带小数位的范围？

我想在红宝石中过滤9.74 - 9.78之间的数组中的结果

if (9.74...9.78) == amounts count += 1 end

这似乎不起作用

How can I check a range with decimal place in ruby?

I want to filter results in an array between 9.74 - 9.78 in ruby

if (9.74...9.78) == amounts count += 1 end

This seems not to work

最满意答案

使用Range#cover执行此操作：

if (9.74...9.78).cover? amounts count += 1 end

示例：

p (9.74...9.78).cover? 9.75 # => true p (9.74...9.78).cover? 9.79 # => false

更新为@m_x建议

# will give you the element in the range array.select{ |item| (9.74..9.78).cover? item } # will give you the element count in the array belongs to the range array.count{ |item| (9.74..9.78).cover? item }

Do this using Range#cover:

if (9.74...9.78).cover? amounts count += 1 end

Example :

p (9.74...9.78).cover? 9.75 # => true p (9.74...9.78).cover? 9.79 # => false

Update as @m_x suggested

# will give you the element in the range array.select{ |item| (9.74..9.78).cover? item } # will give you the element count in the array belongs to the range array.count{ |item| (9.74..9.78).cover? item }