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// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

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Semantic Commit Messages

See how a minor change to your commit message style can make you a better programmer.

Format: <type>(<scope>): <subject>

<scope> is optional

Example

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/*:
 This is a concept re-implementation of the @Binding and @State property wrappers from SwiftUI

 The only purpose of this code is to implement those wrappers myself
   just to understand how they work internally and why they are needed,

 ⚠️ This is not supposed to be a reference implementation nor cover all
      subtleties of the real Binding and State types.
    The only purpose of this playground is to show how re-implementing
      them myself has helped me understand the whole thing better

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    ACTION = build
    AD_HOC_CODE_SIGNING_ALLOWED = NO
    ALTERNATE_GROUP = staff
    ALTERNATE_MODE = u+w,go-w,a+rX
    ALTERNATE_OWNER = grantdavis
    ALWAYS_SEARCH_USER_PATHS = NO
    ALWAYS_USE_SEPARATE_HEADERMAPS = YES
    APPLE_INTERNAL_DEVELOPER_DIR = /AppleInternal/Developer
    APPLE_INTERNAL_DIR = /AppleInternal
    APPLE_INTERNAL_DOCUMENTATION_DIR = /AppleInternal/Documentation

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The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

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import SwiftUI

fileprivate extension DateFormatter {
    static var month: DateFormatter {
        let formatter = DateFormatter()
        formatter.dateFormat = "MMMM"
        return formatter
    }

    static var monthAndYear: DateFormatter {

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image: docker:19.03

variables:
  REPOSITORY_URL: <AWS_ACCOUNT_ID>.dkr.ecr.<REGION_NAME>.amazonaws.com/<ECR_REPOSITORY_NAME>
  REGION: <REGION_NAME>
  TASK_DEFINITION_NAME: <TASK_DEFINITION_NAME>
  CLUSTER_NAME: <CLUSTER_NAME>
  SERVICE_NAME: <SERVICE_NAME>
  CPU: <CPU>
  MEMORY: <MEMORY>

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extension Publisher where Self.Failure == Never {
    public func assignNoRetain<Root>(to keyPath: ReferenceWritableKeyPath<Root, Self.Output>, on object: Root) -> AnyCancellable where Root: AnyObject {
        sink { [weak object] (value) in
            object?[keyPath: keyPath] = value
        }
    }
}

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import Combine
import Foundation

extension NSObjectProtocol where Self: NSObject {
    /// Assigns each unique element assigned to the key paths specified to the inverse object.
    func bidirectionallyAssign<Value: Equatable, B: NSObject>(
        from firstKeyPath: ReferenceWritableKeyPath<Self, Value>,
        to secondKeyPath: ReferenceWritableKeyPath<B, Value>,
        on otherObject: B
    ) -> [AnyCancellable] {

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import Combine

/**
 An observable, mutable property.
 
 Replays the current value when subscribed.
 */
@propertyWrapper
struct Published<Output>: Publisher {
    typealias Failure = Never