mike-myers-tob

Debug with GDB on macOS 11

The big reason to do this is that LLDB has no ability to "follow-fork-mode child", in other words, a multi-process target that doesn't have a single-process mode (or, a bug that only manifests when in multi-process mode) is going to be difficult or impossible to debug, especially if you have to run the target over and over in order to make the bug manifest. If you have a repeatable bug, no big deal, break on the fork from the parent process and attach to the child in a second lldb instance. Otherwise, read on.

Install GDB

Don't make the mistake of thinking you can just brew install gdb. Currently this is version 10.2 and it's mostly broken, with at least two annoying bugs as of April 29th 2021, but the big one is https://sourceware.org/bugzilla/show_bug.cgi?id=24069

$ xcode-select install  # install the XCode command-line tools

mandrean

# Instructions for fresh install

$ sh <(curl -L https://nixos.org/nix/install) --darwin-use-unencrypted-nix-store-volume --daemon
# reboot
$ source /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
$ echo 'export NIX_PATH=darwin-config=$HOME/.nixpkgs/darwin-configuration.nix:$HOME/.nix-defexpr/channels${NIX_PATH:+:}$NIX_PATH' | tee -a ~/.zshrc
$ echo 'source $HOME/.nix-profile/etc/profile.d/hm-session-vars.sh' | tee -a ~/.zshrc
$ nix-channel --add https://nixos.org/channels/nixpkgs-unstable
$ nix-channel --add https://github.com/LnL7/nix-darwin/archive/master.tar.gz darwin
$ nix-channel --add https://github.com/nix-community/home-manager/archive/master.tar.gz home-manager

voanhduy1512

let
  fontOverlay = import ./font-overlays.nix;
  pkgsOverlay = import ./pkgs-overlay.nix;
  user = "anhduy";
in

{ config, pkgs, ... }:

{
  imports = [ <home-manager/nix-darwin> ];

chriselsner

Nix on macOS Catalina

I'm writing this gist for my own records but it might help someone else too.

Installing Nix

Support for Catalina has improved a lot since the update was first rolled out.

Note: See the NixOS manual for discussion of the --darwin-use-unencrypted-nix-store-volume option.

purcell

Automatic python version plus venv

Goal

For easy editor integration and command-line usage, we'd like to be able to specify a Python version per project, with its own virtualenv to isolate its libraries from those of other projects.

We're willing to change $PATH globally once, but not per project. And we'd like to avoid having to run every python command invocation in a special subshell created by a shell wrapper. Instead, simply invoking "python" or "pip" etc. should do the right thing, based on the directory in which it is invoked.

It turns out this is possible!

ngleb

Install MSYS2

Manual is on the home page http://www.msys2.org/

Run MINGW32 (32 bit environment) and update it

pacman --needed -Syu

Install dependencies

rajadain

Notes and Exercises from Chapter 5 of Haskell Book

Benefits of a type system:

• Many errors caught before program execution, at compile time
• Compiler optimizations
• Documentation of programs
• Less code to write because you don't have to validate data at every step

Many, perhaps most, programming languages have type systems that feel like haggling with a petty merchant. Haskell provides a type system that more closely resembles a quiet, pleasant conversation with a colleague than an argument in the bazaar.

indiejoseph

阿爸	a1'ba4	18137
阿昌族	a1'chang1'zu2	50849
阿斗	a1'dou3	42632
阿飞	a1'fei1	48603
阿富汗	a1'fu4'han4	3461
阿訇	a1'hong1	34432
阿拉伯数字	a1'la1'bo2'shu4'zi4	35937
阿拉伯语	a1'la1'bo2'yu3	30476
阿妈	a1'ma1	16220