chrislconover

class ParentViewModelClass {  

  func singleSelectionCell(_ title: String) -> FormCellBuildable {
        return FormCheckmarkCellModel(
            title: title, selected: false,
            didSelect: { model in
                // create single use subscription
                let _ = self.selectedValue.asObservable().withPrevious(startWith: nil).take(1)
                    .filter { $0.1 != nil }.map { ($0.0, $0.1!) }
                    .subscribe(onNext: { from, to in

chrislconover

import RxSwift

var disposeBag: DisposeBag! = DisposeBag()
var variable: Variable<[Int]>!
    = Variable<[Int]>([1, 2, 3])
var variableObserver: Observable! = variable.asObservable()
var subject: PublishSubject<[Int]>! = PublishSubject<[Int]>()
var observable: Observable<[Int]>!

func foo() {

chrislconover

let v = Variable<[Int]>([1, 2, 3])
let withDiffs = v.asObservable().withDiffs(startingWith: [])
    .subscribe(onNext: { print("With diffs: \($0)") })

let justDiffs = v.asObservable().diffs(startingWith: [])
    .subscribe(onNext: { print("Just diffs: \($0)") })
v.value = [1, 3, 4]


prints: 

chrislconover

// Adapted from original Apple Obj-C sample code

import UIKit
import CoreText
import QuartzCore



@IBDesignable
class ClippingLabel : UILabel {

chrislconover

// https://gist.github.com/MrAlek/3d1520ca2c5d981489e2

import UIKit

enum Direction {
    case left, right, up, down

    var pointVector: CGPoint {
        switch self {
        case .left: return CGPoint(x: -1, y: 0)