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@endavid
endavid / List.h
Created February 22, 2024 10:25
Intrusive double-linked list
// Copyright (C) 2012 David Gavilan Ruiz
//
// 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:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH TH
@endavid
endavid / FontAtlas.swift
Created May 27, 2017 18:03
Signed Distance Field in Metal/Swift
public class FontAtlas: NSObject, NSSecureCoding {
public static var supportsSecureCoding: Bool { get { return true } }
static let atlasSize: Int = 2048 // 4096 runs out of mem...
var glyphs : [GlyphDescriptor] = []
let parentFont: UIFont
var fontPointSize: CGFloat
let textureSize: Int
var textureData: [UInt8] = []
@endavid
endavid / layers-to-psd.scm
Created December 18, 2019 17:30
Multilayered PSD from a list of images using #Gimp
;; Copy to ~/Library/Application\ Support/GIMP/2.10/scripts/
;; Ref. https://stackoverflow.com/a/24164916/1765629
;; Usage example:
;; gimp -i -b '(layers-to-psd (list "Background.jpg" "A.png" "B.png") "compo.psd")' -b '(gimp-quit 0)'
;;
(define (layers-to-psd image-paths psd-path)
(define (add-layers image image-paths)
(when (not (null? image-paths))
(let*
(
@endavid
endavid / equatable.swift
Created February 26, 2020 18:04
#swift equatable example for #medium
class Cheese: Equatable {
static func == (lhs: Cheese, rhs: Cheese) -> Bool {
return lhs.rating == rhs.rating
}
let rating : Int
init(rating: Int) {
self.rating = rating
}
}
/// ...
@endavid
endavid / equality-function.swift
Created February 26, 2020 18:02
#swift equality functions for #medium
func ==(lhs: Bread, rhs: Bread) -> Bool {
return lhs.rating == rhs.rating
}
b1 == b2 // true
func ==(lhs: Cheese, rhs: Cheese) -> Bool {
return lhs.rating == rhs.rating
}
c1 == c2 // true
c1 == c4 // false
cheeses.contains(c1) // still an error! not Equatable
@endavid
endavid / triple-equalities.swift
Created February 26, 2020 17:58
#swift triple equality examples for #medium
struct Bread {
let rating : Int
}
class Cheese {
let rating : Int
init(rating: Int) {
self.rating = rating
}
}
var c1 = Cheese(rating: 0)
@endavid
endavid / enum-example.swift
Created February 25, 2020 14:07
#swift enum example for #medium
enum SerializationError: Error {
case missing(String)
case invalid(String, Any)
}
// in some deserialization code
// ...
guard let vertexData = json["vertices"] as? [NSNumber] else {
throw SerializationError.missing("vertices")
}
@endavid
endavid / s3move.sh
Last active December 3, 2019 11:12
#AWS script to move a range of files from an #S3 bucket
#!/bin/bash
# e.g.
# ./s3move.sh -d Images/all/ "15-36-58" "15-54-27" Captures/iPhone6/
DEBUG=
BUCKET=screenshots
PREFIX=Screenshot_
EXT=".png"
while getopts ":db:p:e:" opt; do
@endavid
endavid / multiple.cpp
Created October 8, 2019 08:43
Multiple inheritance -- how to rename a method of an implemented interface
// g++ -Wall -o multiple multiple.cpp
#include <iostream>
// Based on this answer:
// https://stackoverflow.com/a/2005142
// I renamed methods for a serialization example.
// In this example, there's a "Unicorn" class that knows how to doA and doB,
// but user of the respective interfaces do not expect B to get serialized
// when they try to serialize A.
@endavid
endavid / scaleiMovieiPhoneXAppPreview.sh
Created December 29, 2017 00:09
Crop & scale iPhoneX video from iMovie for App Preview
# Still undocumented here https://developer.apple.com/support/app-previews/
# or here https://developer.apple.com/library/content/documentation/LanguagesUtilities/Conceptual/iTunesConnect_Guide/Chapters/Properties.html
# but iPhoneX App Previews required size is 886x1920
# Unfortunately, iMovie seems to be dumb and creates a 750x1334 App Preview video from your iPhoneX capture
# -- and with black margins on the side
# So you need to crop & scale the video up before you submit it to iTunesConnect:
ffmpeg -i iPhoneX-iMovie.mp4 -filter:v "crop=616:1334:68:0" -c:a copy cropped.mp4
ffmpeg -i cropped.mp4 -vf scale=886:1920 -c:a copy iPhoneX-final.mp4