kemchenj

struct SampleCollection<C: RandomAccessCollection>: RandomAccessCollection {
	let storage: C
	let sampleInterval: Int

	var startIndex: C.Index { storage.startIndex }
	var endIndex: C.Index { storage.endIndex }
	func index(before i: C.Index) -> C.Index {
		if i == endIndex {
  		return storage.index(endIndex, offsetBy: -storage.count.remainderReportingOverflow(dividingBy: sampleInterval).partialValue)
		} else {

kemchenj

var sessions = []
var sessionsNodes = document.querySelectorAll("#sessions section.video-container")

for (var i=0;i<sessionsNodes.length;i+=1) {
  var section = sessionsNodes[i]
  var date = section.querySelector("section.sticky section section section span span").textContent
  var sessionsInDateNodes = section.querySelectorAll("ul.videos li.video div.grid div.row")

  var sessionsInDate = []
  

kemchenj

Swift Concurrency

高效，可控，安全的 Concurrency。

整个 Concurrency 功能的结构和思路 https://github.com/SwiftOldDriver/WWDC21/pull/13#issuecomment-862922860：

• async/await
• Structured Concurrency
• Actor
• Global Actor

kemchenj

/*
See LICENSE folder for this sample’s licensing information.

Abstract:
Blur Detector Object.
*/

import AVFoundation
import Accelerate
import UIKit