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@DougGregor
DougGregor / macros.md
Last active October 24, 2023 16:42
A possible vision for macros in Swift

A Possible Vision for Macros in Swift

As Swift evolves, it gains new language features and capabilities. There are different categories of features: some fill in gaps, taking existing syntax that is not permitted and giving it a semantics that fit well with the existing language, with features like conditional conformance or allowing existential values for protocols with Self or associated type requirements. Others introduce new capabilities or paradigms to the language, such as the addition of concurrency or comprehensive reflection.

There is another large category of language features that provide syntactic sugar to eliminate common boilerplate, taking something that can be written out in long-form and making it more concise. Such features don't technically add any expressive power to the language, because you can always write the long-form version, but their effect can be transformational if it enables use cases that would otherwise have been unwieldy. The synthesis of Codable conformances, for ex

@donnywals
donnywals / app_icons.sh
Last active April 28, 2022 18:30
#!/bin/sh
# make sure you have imagemagick installed: brew install imagemagick
# your app_icons.sh file should have the correct permissions: run `chmod 775 app_icons.sh` in your terminal from where you put this file
# put your `my_icon.png` next to this file and run ./app_icons.sh to export your app icons
x=my_icon.png
y=${x%.*}
# delete the export directory so we start clean
@funmia
funmia / compensation-resources.md
Last active January 2, 2023 05:44
Resources on compensation, negotiation and progression.
@funmia
funmia / system-design-interview-resources.md
Last active May 16, 2024 08:30
@funmia
funmia / design-systems-at-spotify.md
Created August 2, 2020 21:37
@funmia
funmia / ios-interview-resources.md
Last active September 2, 2023 07:29
General iOS, CS questions and interview prep resources.
@RuiAAPeres
RuiAAPeres / Injection.md
Last active January 29, 2022 00:01 
/// |                    World                 |
/// |------------------------------------------|
/// | Module A | Module B | Module C | Module D|
  1. World is a module
  2. World is aware of all modules.
  3. Modules aren't aware of World.
@funmia
funmia / design-systems.md
Last active April 7, 2023 07:26
@tclementdev
tclementdev / libdispatch-efficiency-tips.md
Last active May 10, 2024 15:05
Making efficient use of the libdispatch (GCD)

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