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jpsim / scan-shc.swift
Last active Jul 7, 2021
Swift script to scan SHC QR images
View scan-shc.swift
import AppKit
import Compression
import CoreImage
import Foundation
import Vision
// MARK: - Get QR code image from specified path
guard CommandLine.arguments.count == 2 else {
print("Usage: scan-shc [path-to-qr-image]")
jpsim / parallel_map.swift
Created Jun 11, 2021
Parallel map in Swift
View parallel_map.swift
extension Array {
func parallelMap<T>(transform: (Element) -> T) -> [T] {
var result = ContiguousArray<T?>(repeating: nil, count: count)
return result.withUnsafeMutableBufferPointer { buffer in
DispatchQueue.concurrentPerform(iterations: buffer.count) { idx in
buffer[idx] = transform(self[idx])
return { $0! }
jpsim /
Created Jun 14, 2020
FB7736428: SwiftUI navigation bar items unresponsive

With the following code:

import SwiftUI

struct ContentView: View {
    @State private var showPopover = false

    var body: some View {
        NavigationView {
jpsim /
Created Jul 24, 2019
FB6395442: Running 'xcodebuild archive' on a SwiftPM product produces different results than an equivalent .xcodeproj

An Xcode project generates the following archive:

$ tree Yams-macosx.xcarchive
├── Info.plist
├── Products
│   └── Library
│       └── Frameworks
│           └── Yams.framework
jpsim /
Created Apr 22, 2018 — forked from iosdevzone/
A function to find the offsets of newlines ('\n') in UTF-16 encoded string. Try as I might, I cannot get a Swift version within an order of magnitude of the C++ version. Both routines must return arrays of the same size and with equal elements.
#import <Foundation/Foundation.h>
#import <QuartzCore/QuartzCore.h>
#import <iostream>
#import <vector> // Needed for gist to compile.
#pragma mark - Pure Implementation Functions
const static unichar kUTF16Newline = (unichar)'\n'; // old naming habits die hard!
* Calculates an array of line end "positions" for a given string.
* The equivalent Swift function was `(String) -> [Int]` or `(NSString) -> [Int]`

Running jazzy from a fresh Ubuntu machine:

Create a brand new Ubuntu machine

$ doctl compute droplet create jazzy --size 16gb \
    --image ubuntu-16-10-x64 --region sfo1
$ doctl compute ssh jazzy

Install Swift

jpsim /
Created Dec 14, 2017
Build & run a subset of Swift tests on Linux

Build & run a subset of Swift tests on Linux

# Spin up a beefy Digital Ocean droplet
doctl compute droplet create swift-dev --size m-224gb --image ubuntu-16-10-x64 --region sfo2 --ssh-keys XXXXXXX
doctl compute ssh swift-dev
# Install dependencies
apt-get update
apt-get install git cmake ninja-build clang python uuid-dev libicu-dev icu-devtools libbsd-dev libedit-dev libxml2-dev libsqlite3-dev swig libpython-dev libncurses5-dev pkg-config libblocksruntime-dev libcurl4-openssl-dev autoconf libtool systemtap-sdt-dev tzdata
# Clone & build Swift
jpsim /
Last active May 30, 2019
File attachments for rdar://31302382
jpsim /
Last active Jan 18, 2018
Generate Swift docs on Linux with Jazzy and SourceKitten

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