jeffery812’s gists

jeffery812 / Python3 Virtualenv Setup.md

Created April 22, 2019 15:03 — forked from pandafulmanda/Python3 Virtualenv Setup.md

Setting up and using Python3 Virtualenv on Mac

Python3 Virtualenv Setup

Requirements

Python 3
Pip 3

$ brew install python3

jeffery812 / Identifier

Created April 10, 2019 07:46

https://www.swiftbysundell.com/posts/type-safe-identifiers-in-swift In "Identifying objects in Swift" we took a look at how objects can be identified using the built-in ObjectIdentifier type - and this week, we're going to construct similar identifi


	struct Identifier: Hashable {
	let string: String
	}

	extension Identifier: ExpressibleByStringLiteral {
	init(stringLiteral value: String) {
	string = value
	}
	}

jeffery812 / Observable

Created April 9, 2019 13:53

https://www.swiftbysundell.com/posts/handling-mutable-models-in-swift

	class Observable<Value> {
	private var value: Value
	private var observations = [UUID : (Value) -> Void]()

	init(value: Value) {
	self.value = value
	}

	func update(with value: Value) {
	self.value = value

jeffery812 / UIVIew_Drawing.swift

Created February 22, 2019 19:14

	import UIKit
	import CoreGraphics

	extension UIView {
	func createRoundedRectPath(for rect: CGRect, radius: CGFloat) -> CGMutablePath {
	let path = CGMutablePath()

	let midTopPoint = CGPoint(x: rect.midX, y: rect.minY)
	path.move(to: midTopPoint)

jeffery812 / CoolButton.swift

Created February 22, 2019 19:11

From Ray Wenderlich: https://www.raywenderlich.com/216251-core-graphics-how-to-make-a-glossy-button

	/// Copyright (c) 2019 Razeware LLC
	///
	/// Permission is hereby granted, free of charge, to any person obtaining a copy
	/// of this software and associated documentation files (the "Software"), to deal
	/// in the Software without restriction, including without limitation the rights
	/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	/// copies of the Software, and to permit persons to whom the Software is
	/// furnished to do so, subject to the following conditions:
	///
	/// The above copyright notice and this permission notice shall be included in

jeffery812 / Optional

Created January 18, 2019 18:02

	extension Optional where Wrapped: Collection {
	var isNilOrEmpty: Bool {
	return self?.isEmpty ?? true
	}
	}

jeffery812 / CGRect extension

Last active February 29, 2020 10:20

CGRect centre, largestContainedSquare, smallestContainingSquare

	import QuartzCore

	public extension CGRect {
	public init(centre: CGPoint, size: CGSize) {
	self.init(origin: centre.applying(CGAffineTransform(translationX: size.width / -2, y: size.height / -2)), size: size)
	}

	public var centre: CGPoint {
	return CGPoint(x: midX, y: midY)
	}

jeffery812 / CGSize_rescale

Last active February 29, 2020 10:20

	public extension CGSize {
	public func rescale(_ scale: CGFloat) -> CGSize {
	return applying(CGAffineTransform(scaleX: scale, y: scale))
	}
	}

jeffery812 / Collection

Last active February 29, 2020 10:20

Returns the element at the specified index if it is within bounds, otherwise nil.

	public extension Collection {

	/// Returns the element at the specified index if it is within bounds, otherwise nil.
	subscript (safe index: Index) -> Element? {
	return indices.contains(index) ? self[index] : nil
	}
	}

jeffery812 / AsynchronousOperation.swift

Created February 14, 2018 13:58 — forked from calebd/AsynchronousOperation.swift

Concurrent NSOperation in Swift

	import Foundation

	/// An abstract class that makes building simple asynchronous operations easy.
	/// Subclasses must implement `execute()` to perform any work and call
	/// `finish()` when they are done. All `NSOperation` work will be handled
	/// automatically.
	open class AsynchronousOperation: Operation {

	// MARK: - Properties

Jeffery jeffery812

Python3 Virtualenv Setup

Requirements