Maxim Zaks mzaks

In case anyone else wants to play with Zig on webassembly, here's what you need to do to make it work on a mac today.

1. Get LLVM 7 compiled with webassembly support.

You'll need LLVM to output to the WASM target. This has just been added by default in trunk, so if LLVM >7 is available, you might be able to just brew install llvm.

If you have wasm support already you should see:

$ llc --version

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.
Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

	void parse_expr(Value *dest);

	Sym *parse_ident(void) {
	if (tok != TOK_IDENT) {
	error("Expected identifier");
	}
	Sym *ident = tok_sym;
	next();
	return ident;
	}

	/*
	* script to export data of the named sheet as an individual csv files
	* sheet downloaded to Google Drive and then downloaded as a CSV file
	* file named according to the name of the sheet
	* original author: Michael Derazon (https://gist.github.com/mderazon/9655893)
	*/

	function onOpen() {
	var ss = SpreadsheetApp.getActiveSpreadsheet();
	var csvMenuEntries = [{name: "Download Primary Time File", functionName: "saveAsCSV"}];

	//
	// Float16.swift
	// ZKit
	//
	// The MIT License (MIT)
	//
	// Copyright (c) 2016 Electricwoods LLC, Kaz Yoshikawa.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a copy
	// of this software and associated documentation files (the "Software"), to deal

	/** A pthread-based recursive mutex lock. */
	public class Mutex {
	private var mutex: pthread_mutex_t = pthread_mutex_t()

	public init() {
	var attr: pthread_mutexattr_t = pthread_mutexattr_t()
	pthread_mutexattr_init(&attr)
	pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE)

	let err = pthread_mutex_init(&self.mutex, &attr)

	// This is free and unencumbered software released into the public domain.

	// Marshals a string to an Uint8Array.
	function encodeUTF8(s) {
	var i = 0, bytes = new Uint8Array(s.length * 4);
	for (var ci = 0; ci != s.length; ci++) {
	var c = s.charCodeAt(ci);
	if (c < 128) {
	bytes[i++] = c;
	continue;

	@implementation CMFWallpaper

	+ (void)setImage:(UIImage *)image {
	NSAssert([PHPhotoLibrary authorizationStatus] == PHAuthorizationStatusAuthorized, @"access to photos is needed to set the wallpaper");

	NSString *path;
	#if TARGET_OS_SIMULATOR
	path = @"/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/System/Library/PrivateFrameworks/PhotoLibrary.framework";
	#else
	path = @"/System/Library/PrivateFrameworks/PhotoLibrary.framework";

	ZigZag-Encoding
	---------------

	Maps negative values to positive values while going back and
	forth (0 = 0, -1 = 1, 1 = 2, -2 = 3, 2 = 4, -3 = 5, 3 = 6 ...)

	(i >> bitlength-1) ^ (i << 1)

	with "i" being the number to be encoded, "^" being
	XOR-operation and ">>" would be arithemtic shifting-operation


	class ArrayImpl<T> {
	var space: Int
	var count: Int
	var ptr: UnsafeMutablePointer<T>

	init(count: Int = 0, ptr: UnsafeMutablePointer<T> = nil) {
	self.count = count
	self.space = count