klundberg’s gists

klundberg / Binding+initially.swift

Created June 28, 2023 06:41

A mutable variant of Binding.constant to help with swiftui previews

	extension Binding {
	/// like Binding.constant but lets you update the value and stores that updated value via a captured enclosing reference.
	public static func initially(_ value: Value) -> Binding<Value> {
	let box = Box(value)
	return .init(
	get: { box.value },
	set: { box.value = $0 }
	)
	}

klundberg / machine.js

Created November 14, 2019 23:26

Generated by XState Viz: https://xstate.js.org/viz

klundberg / optional-collection.swift

Last active February 24, 2018 23:13

Potential Swift 4.1 implementation of conditional conformace to Collection for Optional<Collection>

	public struct OptionalIndex<InnerIndex: Comparable> {
	let inner: InnerIndex?

	init(_ base: InnerIndex) {
	inner = base
	}

	init() {
	inner = nil
	}

klundberg / optional-conditional-collection.swift

Created February 21, 2018 06:39

Conditional conformance in swift 4.1 for optional for some common protocols

	extension Optional: Collection where Wrapped: Collection {
	public typealias Element = Wrapped.Element
	public typealias Index = Wrapped.Index

	public func index(after i: Wrapped.Index) -> Wrapped.Index {
	switch self {
	case let value?:
	return value.index(after: i)
	case nil:
	fatalError() // TODO: ???

klundberg / genesis_public_key

Created February 20, 2018 21:49

041f94dcd6f7e66679da2ead9c76e5aaa24f0d17ec559ab354806133340f877095226f2d4bc36a07c4cf1f1e9269bb3bb55970234a0af292c869446ce0f6e8e886;nsirlconnection

klundberg / json-codable.swift

Last active September 2, 2021 22:35

encode/decode arbitrary JSON data with swift 4's Codable

	enum JSONValue: Codable, Equatable {
	struct JSONValueDecodingError: Error {
	let message: String
	}

	case boolean(Bool)
	case number(Double)
	case string(String)
	case array([JSONValue?])
	case object([String: JSONValue?])

klundberg / SnakeCaseCodingKeys.stencil

Created September 16, 2017 02:28

Sourcery template that adds CodingKeys overrides for Codable types to convert camelCase property names to snake_case in the serialized format.

	{% for type in types.based.Codable\|!enum %}
	public extension {{ type.name }} {
	enum CodingKeys: String, CodingKey {
	{% for variable in type.variables\|instance %}
	{% if variable\|annotated:"keyOverride" %}
	case {{ variable.name }} = "{{ variable.annotations.keyOverride }}"
	{% else %}
	case {{ variable.name }} = "{{ variable.name\|camelToSnakeCase }}"
	{% endif %}
	{% endfor %}

klundberg / build.log

Created June 13, 2017 02:20

FutureKit build errors with Xcode 9

	/usr/bin/xcrun xcodebuild -workspace /Users/klundberg/workspaces/wayfair-ios/Carthage/Checkouts/FutureKit/FutureKit.xcworkspace -scheme FutureKit\ iOS -configuration Release -derivedDataPath /Users/klundberg/Library/Caches/org.carthage.CarthageKit/DerivedData/FutureKit/3.0.0 -sdk iphoneos ONLY_ACTIVE_ARCH=NO BITCODE_GENERATION_MODE=bitcode CODE_SIGNING_REQUIRED=NO CODE_SIGN_IDENTITY= CARTHAGE=YES clean buildUser defaults from command line:
	IDEDerivedDataPathOverride = /Users/klundberg/Library/Caches/org.carthage.CarthageKit/DerivedData/FutureKit/3.0.0

	Build settings from command line:
	BITCODE_GENERATION_MODE = bitcode
	CARTHAGE = YES
	CODE_SIGN_IDENTITY =
	CODE_SIGNING_REQUIRED = NO
	ONLY_ACTIVE_ARCH = NO
	SDKROOT = iphoneos11.0

klundberg / copyonwrite.swift

Last active April 1, 2017 23:27

Encapsulating copy-on-write behavior in a reusable way.

	// Written using Swift 3.0.x

	fileprivate final class Box<T> {
	let unbox: T
	init(_ value: T) {
	unbox = value
	}
	}

	public struct CopyOnWrite<T: AnyObject> {

klundberg / keybase.md

Created October 18, 2016 00:46

I hereby claim:

To claim this, I am signing this object:

K. Lundberg klundberg