How to call different methods as given in an array

转载于 2014-06-23 11:36:52 发布 · 314 阅读

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本文介绍了一种在Ruby中对数组中的每个元素应用不同方法进行转换的方法。通过定义一个特殊的数组方法，可以有效地将字符串数组中的元素分别转换为字符串、整数、符号和浮点数。

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Especially when working with structs, it would be nice to be able to call a different method per each element in an array, something like this:

array = %w{name 4 tag 0.343}
array.convert(:to_s, :to_i, :to_sym, :to_f)
# => ["name", 4, :tag, 0.343]

Are there any simple one-liners, ActiveSupport methods, etc. to do this easily?

I think it can be done as below way also :-

array = %w{name 4 tag 0.343}

class Array
  def convert(*args)
    self.zip(args).map { |string, meth| string.public_send(meth) }
  end
end    

array.convert(:to_s, :to_i, :to_sym, :to_f) # => ["name", 4, :tag, 0.343]