tclementdev

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

lelandbatey

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results

ccwasden

// -- Usage

struct Content: View {
    @State var open = false
    @State var popoverSize = CGSize(width: 300, height: 300)
    
    var body: some View {
        WithPopover(
            showPopover: $open,
            popoverSize: popoverSize,

niw

How to run Windows 10 on ARM or Ubuntu for ARM64 in QEMU on Apple Silicon Mac

Here is easy steps to try Windows 10 on ARM or Ubuntu for ARM64 on your Apple Silicon Mac. Enjoy!

NOTE: that this is current, 10/1/2021 state.

Running Windows 10 on ARM

1. Install Xcode from App Store or install Command Line Tools on your Mac

bkeating

HOWTO: Using FileMerge (opendiff) with Git on OSX

FileMerge (opendiff) can really come in handy when you need to visually compare merging conflicts. Other times it's just a nice visual way to review your days work.

The following method works by creating a simple bash script (git-diff-cmd.sh) that sets us up with the proper command line arguments for Git to pass off files to FileMerge.

NSURLSession0

<?php

// Constants
$KEY_ID 				= 'YOUR_KEY_ID';
$CONTAINER 				= 'YOUR_CONTAINER';
$PRIVATE_PEM_LOCATION 	= 'eckey.pem'; // Store this file outside the public folder!

// Config
$url = 'https://api.apple-cloudkit.com/database/1/' . $CONTAINER . '/development/public/records/query';
$body = '{"query":{"recordType":"Articles"}}';

simonbs

// We'll store a UIViewController as an associated object and don't want to store a strong reference to it.
private final class WeakBoxedValue<T: AnyObject>: NSObject {
    private(set) weak var value: T?

    init(_ value: T?) {
        self.value = value
    }
}

// Use associated objects to a UIViewController that should determine the status bar appearance.

sterin

cmake_minimum_required(VERSION 2.8.4)

project(so29595222)

find_package(PythonLibs REQUIRED)
include_directories(${PYTHON_INCLUDE_DIRS})

ADD_DEFINITIONS( -std=c++11 )

set(SOURCE_FILES python_threading_example_so29595222.cpp)

joshenders

Successful mitmproxy-3.7 setup tested on OS X 10.13.6 and iPhone X running 12.1.4

Enable IP forwarding and disable ICMP redirects to keep the iPad sending traffic to the proxy

sudo sysctl -w net.inet.ip.forwarding=1
sudo sysctl -w net.inet.ip.redirect=0

net.inet.ip.forwarding
Enable IP forwarding between interfaces

johngray1965

#! /bin/bash

# current the latest stable android branch (from Jan 2020)
githash=daabea6ba6c09f72e956e826b132f1d1b77acb9b
# if want to run this from somewhere other then /data adjust below
basedir=/data

# exit when any command fails
set -e