Josh's Swift Journey

Two days in a row baby! We're onto enumerations first. I want to get a couple more entries this week to finish this course, consolidate then explore more on rw.com. Start Time - 18:50 Intro Enums take advantage of type safety - options to choose from. They are value types. Enums Mostly recap here. Case syntax, raw values. Own raw values can be put in. enum Month : Int {          case january = 1 , february , march , april , may , june , july , august , september , october , november , december } let month = Month . january func monthsUntilChristmas (from month: Month ) -> Int {          Month . december . rawValue - month. rawValue } enum Season : String , CaseIterable {          /// ❄️     case winter          /// 🌾     case spring          /// 🌞     c...

No need for any pre text, let's go! The aim is to complete this chapter on closures today.  Start Time - 17:05 Filter, Reduce and Sort So filter can be used - having certain criteria rather than the for loop! Xcode updating so following along without typing at the moment. Another example with grades. This is what we had before - // -------------------------------------- var stock = [ 1.50 : 5 , 10.00 : 2 , 4.99 : 20 , 2.30 : 5 , 8.19 : 30 ] // -------------------------------------- let stockSums = stock . reduce (into: []) { (result, item) in     result. append (item.key * Double (item.value)) } So this is another use of reduce - complex stuff but good practice! You basically don't need to create your own sorting algorithms - this is what the closure does.  Sort Sorting an array of strings -  names . sort () names . sort { (a, b) -> Bool in     a > b } name...

Right so I've connected to my personal hotspot and am going to code on the coach! I'll aim to do around an hour. Continuing with map, let's go! Start Time - 10:33 Flat Map Oh an example about blogs. How apt! So far, all clear - struct Post {          var post: String     var tags: [ String ] } let blog = Post (post: "Hi all!" , tags: [ "first" , "newbie" ]) let secondBlog = Post (post: "Now a bit about me!" , tags: [ "personal" , "info" , "details" ]) We are going to do something to combine these blogs I reckon! OK forget the above - I got confused! let blog = [      Post (post: "Hi all!" , tags: [ "first" , "newbie" ]), Post (post: "Now a bit about me!" , tags: [ "personal" , "info" , "details" ]) ] let tags = blog . flatMap { $0. tags } And extension time on the array agai...