berikv

func exponentialMovingAverage(currentAverage: Double, newValue: Double, smoothing: Double) -> Double {
    return smoothing * newValue + (1 - smoothing) * currentAverage
}

// Usage:
// var a = 3
// a = exponentialMovingAverage(a, 8, 0.5)


// Swift 2

berikv

import PlaygroundSupport
import SwiftUI

// MARK: - Game

extension TicTacToe.Board {
    var hasNonEmptyCells: Bool {
        self.flatMap { $0 }
            .contains(where: { $0 != .empty })
    }

berikv

#!/bin/sh

set -x

sudo rm -rf /Library/Developer/CommandLineTools/
sudo rm -rf /Applications/Xcode.app
rm -rf ~/Library/Preferences/com.apple.dt.Xcode.plist
rm -rf ~/Library/Caches/com.apple.dt.Xcode
rm -rf ~/Library/Application\ Support/Xcode
rm -rf ~/Library/Developer/

berikv

import SwiftUI
/**
  * An @ViewBuilder will only allow statements that result in a View.
  * `print(value)` does not result in a view and is not allowed in a @ViewBuilder such as `var body: some View`.
  * This view extension allows you print inside a @ViewBuilder.
  *
  * Usage:
  * ```
  *    struct MyView: View {
  *        var body: some View {

berikv

#!/bin/bash

FFMPEG=$(command -v ffmpeg)
INFILE=$1
OUTFILE="${INFILE}.gif"
TMPFILE="${INFILE}_gifify_palette.png"

if ! $FFMPEG -L > /dev/null 2>&1; then
    echo "Run: brew install ffmpeg"
    exit 1

berikv

#! sh

# Install:
#  - Place this file next to the Package.swift in your project
#  - Open a terminal and cd to the project directory
#  - Run: brew install lcov
#  - Run: chmod +x coverage.sh
#
# Usage:
#  Run: ./coverage.sh

berikv

/// Retry a block of code until it succeeds, maximum n times
///
/// Usage:
/// ```
/// var failTimes = 3
/// try retry(5) {
///     if failTimes > 0 {
///         failTimes -= 1
///         throw MyError()
///     }

berikv

// Drop this code in an xcode playground for iOS
// Open the canvas to see the view rendered
// Cmd+Enter to Run

import PlaygroundSupport
import SwiftUI

// Wrap your application state in observable objects
// Adhering to ObservableObject is needed for @ObservedObject, @StateObject and @EnvironmentObject
final class Clock: ObservableObject {

berikv

protocol P {}
struct S: P {}
extension P {
    static var a: P { S() }
}
let v = P.a
// error: static member 'a' cannot be used on protocol metatype 'P.Protocol'
// let v = P.a

berikv

# Paste these lines into your ~/.bashrc or other shell initialisation script
# Note that for most of these, your gitconfig has to have the aliasses from the .gitconfig in this gist

alias co='git checkout'
alias st='git status'
alias add='git add'
alias commit='git commit'

# Amend anything that is staged