The Value in Trees
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The document discusses the implementation and challenges of a distributed value store (DVS) for managing data structures related to documents, sections, and paragraphs in a programming context. It highlights issues such as edit handling and snapshot management while outlining the pros of using value types, including thread safety and memory efficiency. The document also includes code examples and attributions for various image sources.
![struct Document {
var sections: [Section]
}
struct Section {
var paragraphs: [Paragraph]
}
struct Paragraph {
var style: ParagraphStyle
var content: String
}](https://image.slidesharecdn.com/dotswift2017drewmccormack-170201104940/85/The-Value-in-Trees-14-320.jpg)
![class ViewController {
var document: Document {
didSet {
self.reloadViews()
}
}
}
let c = ViewController()
c.document.sections[0].paragraphs[0].style = ...](https://image.slidesharecdn.com/dotswift2017drewmccormack-170201104940/85/The-Value-in-Trees-15-320.jpg)
![DISTRIBUTED VALUE STORE (DVS)
struct Person {
var name = "Bob"
var age = 32
var tags = ["clean", "smart"]
}](https://image.slidesharecdn.com/dotswift2017drewmccormack-170201104940/85/The-Value-in-Trees-22-320.jpg)
![DISTRIBUTED VALUE STORE (DVS)
struct Person {
var name = "Bob"
var age = 32
var tags = ["clean", "smart"]
}
CloudKit Repository](https://image.slidesharecdn.com/dotswift2017drewmccormack-170201104940/85/The-Value-in-Trees-23-320.jpg)
![DISTRIBUTED VALUE STORE (DVS)
struct Person {
var name = "Bob"
var age = 32
var tags = ["clean", "smart"]
}](https://image.slidesharecdn.com/dotswift2017drewmccormack-170201104940/85/The-Value-in-Trees-24-320.jpg)
The Value in Trees
- 1. THE VALUE IN TREES DREW MCCORMACK
- 5. SKETCH PROBLEMS ▸ Edits during saves ▸ Edits during rendering ▸ Fragile undo
- 11. 1.02.0
- 13. VALUE TYPES PROS ▸ Stack memory ▸ No reference counting ▸ Safe between threads ▸ No changes behind your back
- 14. struct Document { var sections: [Section] } struct Section { var paragraphs: [Paragraph] } struct Paragraph { var style: ParagraphStyle var content: String }
- 15. class ViewController { var document: Document { didSet { self.reloadViews() } } } let c = ViewController() c.document.sections[0].paragraphs[0].style = ...
- 16. 1.02.0
- 18. CAN I HAVE A VALUE STORE FOR XMAS?
- 19. …AND CAN I HAVE IT SYNC?
- 20. DISTRIBUTED VALUE STORE (DVS)
- 21. DISTRIBUTED VALUE STORE (DVS) Repository
- 22. DISTRIBUTED VALUE STORE (DVS) struct Person { var name = "Bob" var age = 32 var tags = ["clean", "smart"] }
- 23. DISTRIBUTED VALUE STORE (DVS) struct Person { var name = "Bob" var age = 32 var tags = ["clean", "smart"] } CloudKit Repository
- 24. DISTRIBUTED VALUE STORE (DVS) struct Person { var name = "Bob" var age = 32 var tags = ["clean", "smart"] }
- 26. import Impeller struct Person: Storable { static let storedType = "Person" var metadata = Metadata() var name = "No Name" var age: Int? = nil ...
- 27. init?(readingFrom repository:ReadRepository) { name = repository.read("name")! age = repository.read(optionalFor:"age")! } func write(in repository:WriteRepository) { repository.write(name, for: "name") repository.write(age, for: "age") }
- 29. ATTRIBUTION IMAGES ▸ Sketch Logo ▸ https://www.sketchappsources.com/free-source/2332-new-sketch-vector-icon.html ▸ Bamboo Forest ▸ https://www.pexels.com/photo/nature-forest-trees-bamboo-5091/ ▸ Redwood Forest ▸ https://commons.wikimedia.org/wiki/File:Sequoia_sempervirens_Big_Basin_Redwoods_State_Park_4.jpg ▸ Notes ▸ http://www.cooperazionetrentina.it/Giovani/Iniziative/Iniziative-2015/I-giovani-e-la-cooperazione-che-cambia-7-edizione ▸ Crop Circles ▸ https://commons.wikimedia.org/wiki/File:CropCircleW.jpg ▸ iPhone ▸ https://commons.wikimedia.org/wiki/File:IPhone_with_icons.svg ▸ Database Icon ▸ https://pixabay.com/en/database-diagram-data-storage-disk-29954/ ▸ Jedward ▸ https://www.flickr.com/photos/chiropractic/6849052778 ▸ No cycling ▸ https://commons.wikimedia.org/wiki/File:Uruguay_Road_Sign_Bicycles_Only.svg ▸ Planting ▸ https://www.flickr.com/photos/usfsregion5/3598029211