创建符号数组 [英] Create array of symbols

问题描述

有没有更简洁的方法来做这样的事情?

Is there a cleaner way to do something like this?

%w[address city state postal country].map(&:to_sym) 
#=> [:address, :city, :state, :postal, :country]

我本以为 %s 会做我想做的事，但事实并非如此.它只需要括号之间的所有内容，并从中生成一个大符号.

I would have figured %s would have done what I wanted, but it doesn't. It just takes everything between the brackets and makes one big symbol out of it.

只是一个小小的烦恼.

推荐答案

原始答案写于 11 年 9 月，但是，从 Ruby 2.0 开始，有一种更短的方法来创建符号数组！这个文字:

The original answer was written back in September '11, but, starting from Ruby 2.0, there is a shorter way to create an array of symbols! This literal:

%i[address city state postal country]

会做你想做的事.

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