Ideally, errors should never occur. File we need should always be available and networks should always be present and reliable. Unfortunately this reality is not ideal and we have to deal with the consequences. Thankfully the Swift team included a great way to handle these deviations from the ideal in Swift 2. Swift Error Handling lets us quickly and easily warn the compiler whether a function can throw an error, actually throw it, and handle it in whatever way seems appropriate.
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Error Handling in Swift
