kconner

macOS Internals

Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details.

Starting Points

How to use this gist

You've got two main options:

xirixiz

#!/bin/bash

# NAS IP: 192.168.1.10 in this example
# DHCP scope reservation for macvlan: 192.168.1.210/28 (Details below)
## Network:   192.168.1.210/28
## HostMin:   192.168.1.211
## HostMax:   192.168.1.224
## Hosts/Net: 14

# Create a Synology macvlan0 bridge network attached to the physical eth0, and add the ip range scope (sudo)

piscisaureus

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = git@github.com:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

angerman

The nixos.org website suggests to use:

sh <(curl -L https://nixos.org/nix/install)

For macOS on Intel (x86_64) or Apple Silicon (arm64) based macs, we need to use

sh <(curl -L https://nixos.org/nix/install) --darwin-use-unencrypted-nix-store-volume

paragonie-scott

Hello software developers,

Please check your code to ensure you're not making one of the following mistakes related to cryptography.

I. General Mistakes

• Writing your own home-grown cryptography primitives (For example: Mifare Classic)
  • Exception: For the sake of learning, but don't deploy it in production.
• Using a fast hash function (e.g. MD5, SHA256) for storing passwords. Use bcrypt instead.
• Not using a cryptographically secure random number generator

timcharper

Before

yum install -y systemd-networkd
modprobe macvlan # make sure this returns no errors

Put config files in place

eth0.network and mac0.{netdev,network} go in /etc/systemd/network/

andkerosine

$stack, $draws = [], {}

def method_missing *args
  return if args[0][/^to_/]
  $stack << args.map { |a| a or $stack.pop }
  $draws[$stack.pop(2)[0][0]] = args[1] if args[0] == :<
end

class Array
  def +@

tenderlove

Fibur

Fibur is a library that allows concurrency during Ruby I/O operations without needing to make use of callback systems. Traditionally in Ruby, to achieve concurrency during blocking I/O operations, programmers would make use of Fibers and callbacks. Fibur eliminates the need for wrapping your I/O calls with Fibers and a callback. It allows you to write your blocking I/O calls the way you normally would, and still have concurrent execution during those I/O calls.

Example

Say you have a method that fetches data from a network resource:

isa

Question: Convert following into the latter data structure in less than 30 lines:

List:
  A, B, C
  A, C, E
  E, F, D
  D, A, J
  E, D, J

List

NARKOZ

# requires BSD sed
namespace :whitespace do
  desc 'Removes trailing whitespace'
  task :cleanup do
    sh %{for f in `find . -type f | grep -v .git | grep -v ./vendor | grep -v ./tmp | egrep ".(rb|js|haml|html|css|sass)"`;
          do sed -i '' 's/ *$//g' "$f";
        done}, {:verbose => false}
    puts "Task cleanup done"
  end