Tag: dictionary
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Tip: Deep Dive into Any? Dictionaries
In many factory methods, you’ll find parameters with type Any? like this: userInfo parameters in iOS and context in watchOS use these. You can place anything there, but most often, you’ll use a dictionary of type [String:Any]. This is a great way of moving multiple values from one method to another without making a class…
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How to Make Drill-Down Tables in Swift
Table views are a lot like potato chips: You can’t have just one. Often, table views relate to each other in what is often referred to as a drill-down. Drill downs typically take the selected data and provide another list in a table about the selection. It creates a hierarchical selection. You might have a…
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Swift WatchKit: Selecting With Multiple Rows in Apple Watch
In the last lesson we created a multi-row table. However, we can only view the table, not select from the table. Multi-row tables provide some challenges with selection. Along the way, we’ll make a new interface to display selected information, using a technique we have not yet covered in this series: A dictionary as a…
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The Swift Swift Tutorial: Using Dictionaries and Optional Types
[Updated for Swift 2.0/iOS9 9/10/2015 – SJL ] In our last lesson, The PizzaDemo App so far told us some information about pizza sizes. What would be nice is for it to tell us the price for a pizza, based on the area of the pizza. We can learn about Swift dictionaries that way. For…
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From Apple to Raspberry Pi: Why use a Tkinter Listbox?
As those who have followed this series over the last few weeks might have noted, I’ve racked my brain trying to get around the Tkinter Listbox. For those not familiar with the Tkinter Listbox, it’s a GUI widget which allow for selection from a list of items, but the items can only be one word…
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