Benjamin Mayo benjaminmayo
benjaminmayo
/ ZipSparsePairs.swift
Last active
March 1, 2020 19:43
This is an example implementation of the zip sparse pairs algorithm in Swift. The sequence iterates through two sorted sequences of elements, which are then paired according to some supplied `predicate`. The sequence returns a stream of `PossiblePair` instances.
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| struct ZipSparsePairsSequence<A: Sequence, B: Sequence> : Sequence { | |
| private var primary: A | |
| private var subset: B | |
| private let predicate: PairingPredicate | |
| fileprivate init(primary: A, subset: B, pairingWith predicate: @escaping PairingPredicate) { | |
| self.primary = primary | |
| self.subset = subset | |
| self.predicate = predicate | |
| } |
benjaminmayo
/ ViewController.swift
Last active
June 6, 2021 08:58
Working example of UIActivityItemProvider customising a shared URL depending on the activity type. http://benjaminmayo.co.uk/twitter-app-sharing-link-garbage
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| import UIKit | |
| class ViewController : UIViewController { | |
| // Monotonous view setup hidden. Imagine there's a button on screen that gets tapped and fires the action below. | |
| @IBAction func shareLinkButtonPressed(_ sender: Any) { | |
| let urlToShare = URL(string: "http://twitter.com/bzamayo")! // the base URL, in a real app this would be provided dynamically based on the current context | |
| let sharingActivityItemProvider = LinkSharingActivityItemProvider(url: urlToShare) // make an activity item provider, defined below | |
| let activityViewController = UIActivityViewController(activityItems: [sharingActivityItemProvider], applicationActivities: nil) |