0x00 Lesson
Arrays
are also structs, which means they too have their own methods and properties we can use to query and manipulate the array.
Here’s a simple array to get us started:
var toys = ["Woody"]
You can read the number of items in an array using its count
property:
print(toys.count)
If you want to add a new item, use the append()
method like this:
toys.append("Buzz")
You can locate any item inside an array using its firstlndex()
method, like this:
toys.firstIndex(of: "Buzz")
That will return 1
because arrays count from 0
.
Just like with strings, you can have Swift sort
the items of the array alphabetically:
print(toys.sorted())
Finally, if you want to remove an item, use the remove()
method like this:
toys.remove(at: 0)
Arrays have lots more properties and methods - try typing toys.
to bring up Xcode’s code completion options.
0x01 我的小作品
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