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Supporting FormatStyle & ParseableFormatStyle To Your Custom Types

A full example of adding String and AttributedString output to our custom types, as well as adding the ability to parse String values into your custom type.

Read the blog post

See the Xcode Playground

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import SwiftUI
let width : CGFloat = 82.0
let height : CGFloat = 82.0
struct ContentView: View {
    @State private var toggle = false
    var body: some View {
        VStack {
            Spacer()
            ZStack {
                Image(systemName: "heart.fill")

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// by dave
float[][] result;
float t, c;

float ease(float p) {
  p = c01(p);
  return 3*p*p - 2*p*p*p;
}

float ease(float p, float g) {

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//------------------------------------------------------------------------
// Author: The SwiftUI Lab
// Post: Advanced SwiftUI Animations - Part 4
// Link: https://swiftui-lab.com/swiftui-animations-part4 (TimelineView)
//

import SwiftUI

struct CyclicTimelineSchedule: TimelineSchedule {
    let timeOffsets: [TimeInterval]

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Processing JSON using jq

jq is useful to slice, filter, map and transform structured json data.

Installing jq

On Mac OS

brew install jq

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Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

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#!/usr/bin/ruby
# Create display override file to force Mac OS X to use RGB mode for Display
# see http://embdev.net/topic/284710

require 'base64'

data=`ioreg -l -d0 -w 0 -r -c AppleDisplay`

edids=data.scan(/IODisplayEDID.*?<([a-z0-9]+)>/i).flatten
vendorids=data.scan(/DisplayVendorID.*?([0-9]+)/i).flatten

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Async calls

<template>
<!-- 
When isLoading is true, the <div> is in the DOM, the <p> is not.
When isLoading is false, Vue will remove the <div> and add the <p> to the DOM,
at which point <MyComponent> will be created and passed the fetched data.
-->

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import Foundation
import SwiftUI

struct GradientCircle: View {
    var body: some View {
        let color1 = Color.init(red: 81/255, green: 204/255, blue: 159/255)
        let color2 = Color.init(red: 154/255, green: 255/255, blue: 248/255)
        let spectrum = Gradient(colors: [ color1, color2])
        let conic =
            LinearGradient(gradient: spectrum, startPoint: UnitPoint(x: 0, y: 0.5), endPoint: UnitPoint(x: 0.5, y: 1))

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//--------------------------------------------------
// The SwiftUI Lab: Advanced SwiftUI Animations
// https://swiftui-lab.com/swiftui-animations-part1
//--------------------------------------------------
import SwiftUI

struct ContentView: View {
    
    var body: some View {
        NavigationView {