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:

MikaAK

Big-O Time Complexities for Elixir data structures

Map [1]

Operation	Time Complexity
Access	O(log n)
Search	O(log n)
Insertion	O(n) for < 32 elements, O(log n) for >= 32 elements [2]
Deletion	O(n) for < 32 elements, O(log n) for >= 32 elements

wilbowma

#lang racket

(require (rename-in racket/base [+ r:+]))
(provide +)

(define (join e1 e2)
  (cond
    [(and (number? e1) (number? e2))
     number?]
    [(and (number? e1) (symbol? e2))

ctsrc

Guide: Run FreeBSD 13.1-RELEASE for ARM64 in QEMU on Apple Silicon Mac (MacBook Pro M1, etc) with HVF acceleration (Hypervisor.framework)

This guide was adapted from https://gist.github.com/niw/e4313b9c14e968764a52375da41b4278#running-ubuntu-server-for-arm64

Running FreeBSD 13.1-RELEASE for ARM64

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

alex-hhh

;; A space invaders game in Racket

;; Copyright (c) 2020 Alex Harsányi (AlexHarsanyi@gmail.com)

;; Permission is hereby granted, free of charge, to any person obtaining a
;; copy of this software and associated documentation files (the "Software"),
;; to deal in the Software without restriction, including without limitation
;; the rights to use, copy, modify, merge, publish, distribute, sublicense,
;; and/or sell copies of the Software, and to permit persons to whom the
;; Software is furnished to do so, subject to the following conditions:

tekin

# Stick this in your home directory and point your Global Git config at it by running:
#
#  $ git config --global core.attributesfile ~/.gitattributes
#
# See https://tekin.co.uk/2020/10/better-git-diff-output-for-ruby-python-elixir-and-more for more details

*.c     diff=cpp
*.h     diff=cpp
*.c++   diff=cpp
*.h++   diff=cpp

aphyr

:- use_module(library(pairs)).
:- use_module(library(reif)).

not_in_list(K, L) :-
  if_((L = []),
    true,
    ([X | More] = L,
     dif(K, X),
     not_in_list(K, More))).

senderle

So you want to modify the text of a PDF by hand...

If you, like me, resent every dollar spent on commercial PDF tools, you might want to know how to change the text content of a PDF without having to pay for Adobe Acrobat or another PDF tool. I didn't see an obvious open-source tool that lets you dig into PDF internals, but I did discover a few useful facts about how PDFs are structured that I think may prove useful to others (or myself) in the future. They are recorded here. They are surely not universally applicable --
the PDF standard is truly Byzantine -- but they worked for my case.

AllenDang

Use pre-built gccemacs

Fortunatly we could use pre-built gccemacs right now.

Those two repos did the greate job for us.

https://github.com/twlz0ne/nix-gccemacs-darwin

https://github.com/twlz0ne/nix-gccemacs-sierra

Here is the tutorial:

berndverst

Add captions to MP4 videos as subtitles

Requirements

FFMpeg must be installed.

Instructions:

• On Mac: Use Homebrew brew install ffmpeg
• http://ffmpeg.org/download.html