预期收益的“＃=>”约定 [英] The `#=>` convention for expected returns
问题描述
Ruby惯例是使用＃=> 来描述期望的回报。我意识到我自己使用了＃=> （带有一些空格或制表符）。这只是一个约定，没有正式的规范，因此我想问一下Ruby程序员中的约定是什么。
It is a Ruby convention to use #=> for describing expected returns. I realized that I use # => (with some space or tabs) myself. This is just a convention, and there is no formal specification, so I would like to ask what the convention is among Ruby programmers. Is
-
＃=>是唯一正确的方法还是首选，
#=>the only correct way or is preferred,# =>is preferred, or- Either is almost equally used?
并且，是否有任何理由排除或喜欢一种形式？
And, would there be any reasons to exclude or prefer one form?
推荐答案
我不会说这是一个约定。至少我还没有读过任何地方。我之所以使用它，只是因为我的编辑器（TextMate）在评估代码时可以帮助扩展这些标记。例如，如果我键入以下行：
I wouldn't say it's a convention. At least, I haven't read anywhere about it. I use it myself only because my editor (TextMate) helpfully expands these markers when evaluating code. For example, if I type this line:
2 + 3 #
然后按TAB键，它将在哈希字符后插入 => 。该行变为：
And then press TAB, it will insert => after the hash character. The line becomes this:
2 + 3 # =>
然后，如果我按下快捷键，它将运行代码并在之后插入/更新相应行的值＃=> 标记。
Then if I press a shortcut, it will run the code and insert/update value of corresponding lines after the # => markers.
2 + 3 # => 5
此外，我个人认为＃=> 比＃=> 更具可读性。
Also, I personally think that # => looks much more readable than #=>.
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