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This is an excerpt from the Scala Cookbook (partially modified for the internet). This is Recipe 20.6, “Scala best practice: How to use the Option/Some/None pattern.”Back to top
For a variety of reasons, including removing
null values from your Scala code, you want to use what I call the Option/Some/None pattern. Or, if you’re interested in a problem (exception) that occurred while processing code, you may want to return Try/Success/Failure from a method instead of Option/Some/None.
A very important warning: When you drag your folder over to the PLACES section of the Finder, make sure your image looks like the image shown above, where the folder is clearly going to be placed between two existing folders. If you drag your folder over to the left side, and you're highlighting another folder in the PLACES section, you're going to end up moving your folder to that other folder. That's a great technique for moving your folder from one place to another, but it's not what I'm trying to describe here.
One of the cool things about the Mac Finder is that you can create shortcuts, or bookmarks, to folders that you visit frequently. This is cool, because instead of clicking around to get to your commonly used directories, you can get to them with just one mouse click. That's as fast I can think to make it.