insidegui

struct ScrollViewOffsetPreferenceKey: PreferenceKey {
    static var defaultValue: CGPoint = .zero
    
    static func reduce(value: inout CGPoint, nextValue: () -> CGPoint) {
        value = nextValue()
        print("value = \(value)")
    }
    
    typealias Value = CGPoint

chockenberry

//
//  Debug.swift
//
//  Created by Craig Hockenberry on 3/15/17.
//  Updated by Craig Hockenberry on 2/20/24.

//  Usage:
//
//    SplineReticulationManager.swift:
//

Silly dice roller

import Foundation

struct Dice : SequenceType {
    typealias Generator = GeneratorOf<Int>
    let dice:[Int]
    init (rolls:Int, sides:Int) {
        dice = Array(count:rolls, repeatedValue:sides)
    }
    func roll() -> Int {
        return dice.map { Int(arc4random_uniform(UInt32($0 - 1)) + 1) }

kreeger

BDKCollectionIndexView

An index-title-scrubber-bar, for use with a UICollectionView (or even a PSTCollectionView). Gives a collection view the index title bar for -sectionIndexTitles that a UITableView gets for (almost) free. A huge thank you to @Yang from [this Stack Overflow post][so], which saved my bacon here.

The problem

When you're using a UITableView and you define the UITableViewDataSource method -sectionIndexTitlesForTableView:, you get a sweet right-hand-side view for scrubbing through a long table view of fields, separated by sections. The titles are the names of the sections, by default (or at least letters based on the section names).