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Tag Archives: Swift
Simplifying NSJSONSerialization in Swift
While writing a pet project app in Swift I put together this convenience function that simplifies converting an NSData into JSON objects via the NSJSONSerialization class. My JSONObjectWithData function adds a Swift-friendly API on top of the Foundation method of the same name. Here is … Continue reading
Nil-coalescing Operator in Swift
Update: As of Xcode 6 Beta 5 this article is obsolete. Swift now includes a nil coalescing operator (??). I am leaving this article on my blog for people who are curious about why such an operator exists or when … Continue reading
Custom Threading Operator in Swift
The Swift language supports custom operator functions, similar to operator overloading in C++. This kind of language feature has been known to enable overly “enthusiastic” developers to create a quagmire of unreadable code, which is why I was surprised to see … Continue reading
Understanding Swift’s reduce Method
Swift’s API includes many functions and instance methods that reflect its functional programming heritage. A prime example is called reduce. You can reduce a collection of values down to just one value, such as calculating the sum of every person’s age in an array of … Continue reading
Create a Swift Dictionary from an Array
Here is a Gist I posted showing a Swift utility function that enables you to create a Dictionary containing an optional entry for every element in an Array. It uses the reduce function to create one Dictionary from every element in … Continue reading
Cross-join two Swift arrays
Here is a Gist I just published on GitHub of a utility function that performs a cross-join between two Swift arrays. This allows you to iterate over one array for every element in another array, and return an optional value built for … Continue reading
Randomly shuffle a Swift array
I just posted a Gist on GitHub that shows how to add a shuffle method to Swift’s Array class, which randomizes the order of an array’s elements. My shuffle method relies on the arc4random function, which means that the file containing that extension … Continue reading