lipka

CGFloat ScaleToAspectFitRectInRect(CGRect rfit, CGRect rtarget)
{
    // first try to match width
    CGFloat s = CGRectGetWidth(rtarget) / CGRectGetWidth(rfit);
    // if we scale the height to make the widths equal, does it still fit?
    if (CGRectGetHeight(rfit) * s <= CGRectGetHeight(rtarget)) {
        return s;
    }
    // no, match height instead
    return CGRectGetHeight(rtarget) / CGRectGetHeight(rfit);

lipka

1. Install Xcode (available in the Mac App Store)
2. Install [Brew](https://brew.sh)
3. Install [Cocoapods](https://cocoapods.org)
4. Install [Fastlane](https://docs.fastlane.tools)
5. In Xcode, make sure that under Preferences/Locations the Command Line Tools field is not empty
6. Add provisoning profiles and certificates
7. Install [Buildkite agent](https://buildkite.com/docs/agent/v3/osx)
    * `brew tap buildkite/buildkite`
    * `brew install --token='INSERT-YOUR-AGENT-TOKEN-HERE' buildkite-agent`
    * Run `brew info buildkite-agent` and execute the command displayed at the end to autostart the agent

lipka

// Swift's `Task` silently discards errors from throwable callsites. `SafeTask` forces you to explicitly handle errors at the callsite and helps you avoid mistakes with silently discarded errors.

@discardableResult func SafeTask<Success>(priority: TaskPriority? = nil, operation: @escaping () async -> Success) -> Task<Success, Never> where Success: Sendable {
    return Task(priority: priority, operation: {
        await operation()
    })
}

lipka

import Foundation

// Based on https://www.swiftbysundell.com/articles/caching-in-swift/

final class Cache<Key: Hashable, Value> {
    private let wrapped = NSCache<WrappedKey, Entry>()

    func insert(_ value: Value, forKey key: Key) {
        let entry = Entry(value: value)
        wrapped.setObject(entry, forKey: WrappedKey(key))

lipka

import Foundation

/**
 Limits the rate at which a closure is executed by preventing it's execution until a specified amount of time has elapsed.

 Example:
 ```
 let fetchThrottle = Throttle(interval: 60)

 fetchThrottle {