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@Catfish-Man
Catfish-Man / sethack.m
Created March 11, 2016 06:21
Demonstrating the trick of using stack-allocated mimics and sets for lookup tables instead of heap allocated keys and dictionaries
// Compile with clang -framework Foundation sethack.m
#import <Foundation/Foundation.h>
#import <objc/runtime.h>
/*
CFHashBytes from http://www.opensource.apple.com/source/CF/CF-1153.18/CFUtilities.c
*/
#define ELF_STEP(B) T1 = (H << 4) + B; T2 = T1 & 0xF0000000; if (T2) T1 ^= (T2 >> 24); T1 &= (~T2); H = T1;
@steipete
steipete / ios-xcode-device-support.sh
Last active May 11, 2025 13:30
Using iOS 15 devices with Xcode 12.5 (instead of Xcode 13)
# The trick is to link the DeviceSupport folder from the beta to the stable version.
# sudo needed if you run the Mac App Store version. Always download the dmg instead... you'll thank me later :)
# Support iOS 15 devices (Xcode 13.0) with Xcode 12.5:
sudo ln -s /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/15.0 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport
# Then restart Xcode and reconnect your devices. You will need to do that for every beta of future iOS versions
# (A similar approach works for older versions too, just change the version number after DeviceSupport)
#! /bin/ruby
def main argv
n = (argv[0] || 2).to_i rescue 2
m = (argv[1] || 20).to_i rescue 20
g = n_gram n
g.
enum_for(:each_pair).
lazy.
sort_by {|k, v| -v }.
@zwaldowski
zwaldowski / Extra Logging for My Great App.mobileconfig
Last active March 28, 2025 03:47
Apple Configuration Profile for Logging in iOS 10 and macOS Sierra
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<!-- iOS 10, macOS Sierra, and friends bring a new logging subsystem that's
supposed to scale from the kernel, up to frameworks, and up to apps. It defaults
to a more regimented, privacy-focused approach that large apps and complex
systems need.
It, along with Activity Tracing introduced in iOS 8 and macOS Yosemite and the
Console app in macOS Sierra, hope to help you graduate from caveman debugging to
@donbright
donbright / README.tinycc.darwin8.md
Last active September 4, 2018 09:00
This allows rudimentary usage of TinyCC on Darwin 8 i386, the core of MacOSX 10.4

Step 0.

The point of this is to install the TinyCC compiler on the Darwin 8 computer operating sysytem, running on an i386 mcahine. Darwin 801 is the open source core of Apple's Mac OSX (TM) 10.4 Tiger operating system. The hottest operating system of 2005.

These are extremely rudimentary instructions, assuming you have an extensive experience with commandline and familiarity with the various terminology and jargon.

This was streamed on raw video here, and contains full unedited details of how it was done the first time:

@searls
searls / market_research.rb
Last active September 18, 2018 03:21
Was chatting with @mfeathers about retaining Ruby's chained Enumerable style, but finding a way to inject names that reflects the application domain (as opposed to just littering functional operations everywhere, which may be seen as a sort of Primitive Obsession)
# A little toy file demonstrating how to build chainable
# data transformations that reveal some amount of intent
# through named extracted methods.
#
# Kudos to @mfeathers for giving me the idea to try this
#
# Copyright Test Double, LLC, 2016. All Rights Reserved.
require_relative "marketing_refinements"

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.


Effective Engineer - Notes

What's an Effective Engineer?

@Gankra
Gankra / OwnershipTLDR.md
Last active April 3, 2019 22:44
Swift Ownership Manifesto TL;DR

Swift Ownership Manifesto TL;DR

Most of the manifesto is background and detailed definitions -- if you're confused or want details, read the manifesto!

https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20170213/032155.html

Note also that manifestos aren't complete proposals -- syntax and details may change!

One piece of background: inout is kinda complicated because it can be used on computed properties -- foo(&val.x) might be sugar for

FreeTypeCache cleanUp.
Clipboard startUp: true.
RubEditingState allInstances do: [ :each | each instVarNamed: #undoManager put:nil].
GTPlayBook reset.
EditorFindReplaceDialogWindow cleanUp.
ActiveHand resetClickState; releaseAllFocus.
UITheme current focusIndicator: nil.
40 timesRepeat: [
1 second wait.
World doOneCycle.
@aparrish
aparrish / understanding-word-vectors.ipynb
Last active May 8, 2025 14:50
Understanding word vectors: A tutorial for "Reading and Writing Electronic Text," a class I teach at ITP. (Python 2.7) Code examples released under CC0 https://creativecommons.org/choose/zero/, other text released under CC BY 4.0 https://creativecommons.org/licenses/by/4.0/
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