当使用ruby定义一系列键时，将所有Key值作为组合字符串获取

Get all the Key values as a combined string when a range of keys are defined using ruby

我有以下代码

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class MyClass

def my_method(first,last)
#this should take 2 numbers as arguments and should return the keys value(s) as a combined string
end
private
def lines_of_code
{
1 =>"This is first",
2 =>"This is second",
3 =>"This is third",
4 =>"This is fourth",
5 =>"This is fifth"
}
end
m = MyClass.new
m.my_method(2,4) # This is secondThis is thirdThis is fourth"

我应该将一个范围传递给my_method，因为inturn应该返回组合值字符串。
对不起，如果已经发布了。

提前致谢。

这是一个使用Hash#values_at的技巧：

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class MyClass

def my_method(first, last)
lines_of_code.values_at(*first..last)
end

private

def lines_of_code
{
1 =>"This is first",
2 =>"This is second",
3 =>"This is third",
4 =>"This is fourth",
5 =>"This is fifth"
}
end
end

m = MyClass.new
p m.my_method(2,4)
# >> ["This is second","This is third","This is fourth"]
# to get a string
p m.my_method(2,4).join("")
# >>"This is second This is third This is fourth"