![]() ![]() Here's an example with four key-value pairs: let dictionary: = [ Swift dictionaries are a generic collection of key-value elements, where the Key type needs to conform to Hashable (for performance reasons), and the Value type has no restrictions. We will focus on json examples, the same can be applied to plists. In this article let's have a look at a little known behavior when it comes to dictionaries with custom key types. MaFederico Zanetello much every project out there nowadays uses Codable, introduced in 2017 with Swift 4.įast forward to 2021 and Codable can still surprise us: ![]() ![]() If let dataFromString = jsonString.data(using. Decode the JSON data using the APOD struct we created that follows this data's structure. ![]() The struct we are going to use to encode/decode the JSON data above. A multi-line string literal representing the JSON we want to work with. "title": "Orionids Meteors over Inner Mongolia", Follow APOD on: Facebook, Instagram, Reddit, or Twitter", Next month, the Leonids Meteor Shower from Comet Tempel-Tuttle should also result in some bright meteor streaks. An Orionids image featured on APOD one year ago today from the same location shows the same car. Comet Halley is actually responsible for two known meteor showers, the other known as the Eta Aquarids and visible every May. The featured image shows multiple meteor streaks that can all be connected to a single small region on the sky called the radiant, here visible just above and to the left of the belt of Orion, The Orionids meteors started as sand sized bits expelled from Comet Halley during one of its trips to the inner Solar System. Pictured here, over two dozen meteors were caught in successively added exposures last October over Wulan Hada volcano in Inner Mongolia, China. This was expected, as October is the time of year for the Orionids Meteor Shower. "explanation": "Meteors have been shooting out from the constellation of Orion. ![]()
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