The following are appendices from Optics By Example, a comprehensive guide to optics from beginner to advanced! If you like the content below, there's plenty more where that came from; pick up the book!
Vladimir Kochnev marshall-lee
gmpreussner
/ archlinux-install-nvme-luks-lvm-btrfs-usb
Last active
March 23, 2023 09:31
Minimal instructions for installing a fully encrypted ArchLinux with USB boot on Lenovo Yoga 920.
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| # Install a fully encrypted ArchLinux on NVMe with detached LUKS | |
| # headers and LUKS encrypted UEFI boot partition on a USB dongle. | |
| # | |
| # Full tutorial can be found here: | |
| # https://headcrash.industries/reference/fully-encrypted-archlinux-with-secure-boot-on-yoga-920/ | |
| # | |
| # Written by Gerke Max Preussner <info@headcrash.industries> | |
| # Overview ############################################################ |
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| (defvar coq-pre-extensions | |
| '( | |
| proof-general | |
| )) | |
| (defun coq/init-proof-general () | |
| "Initialize Proof General" | |
| (use-package proof-site | |
| :defer t | |
| :mode ("\\.v\\'" . coq-mode) |
pixeltrix
/ time_vs_datatime.md
Last active
August 2, 2024 15:13
When should you use DateTime and when should you use Time?
It's a common misconception that [William Shakespeare][1] and [Miguel de Cervantes][2] died on the same day in history - so much so that UNESCO named April 23 as [World Book Day because of this fact][3]. However because England hadn't yet adopted [Gregorian Calendar Reform][4] (and wouldn't until [1752][5]) their deaths are actually 10 days apart. Since Ruby's Time class implements a [proleptic Gregorian calendar][6] and has no concept of calendar reform then there's no way to express this. This is where DateTime steps in:
>> shakespeare = DateTime.iso8601('1616-04-23', Date::ENGLAND)
=> Tue, 23 Apr 1616 00:00:00 +0000
>> cervantes = DateTime.iso8601('1616-04-23', Date::ITALY)
=> Sat, 23 Apr 1616 00:00:00 +0000
ptrv
/ lldb-gud-emacs-25.patch
Last active
October 17, 2017 14:55
lldb-gud patch from llvm.org for emacs 25
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| diff --git a/lisp/progmodes/gud.el b/lisp/progmodes/gud.el | |
| index 42c5b20..0f6f412 100644 | |
| --- a/lisp/progmodes/gud.el | |
| +++ b/lisp/progmodes/gud.el | |
| @@ -35,7 +35,7 @@ | |
| ;; kluge with the gud-xdb-directories hack producing gud-dbx-directories. | |
| ;; Derek L. Davies <ddavies@world.std.com> added support for jdb (Java | |
| ;; debugger.) Jan Nieuwenhuizen added support for the Guile REPL (Guile | |
| -;; debugger). | |
| +;; debugger). llvm.org added support for lldb. |
JunichiIto
/ alias_matchers.md
Last active
September 13, 2024 12:45
List of alias matchers in RSpec 3
This list is based on aliases_spec.rb.
You can see also Module: RSpec::Matchers API.
| matcher | aliased to | description |
|---|---|---|
| a_truthy_value | be_truthy | a truthy value |
| a_falsey_value | be_falsey | a falsey value |
| be_falsy | be_falsey | be falsy |
| a_falsy_value | be_falsey | a falsy value |
henrik
/ config-projections.json
Last active
November 20, 2019 19:18
Rails.vim 5 projections.json configuration for our projects. http://robots.thoughtbot.com/post/50107717967/extending-rails-vim-with-custom-commands
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| { | |
| "app/models/*.rb": { | |
| "command": "model", | |
| "affinity": "model", | |
| "alternate": ["unit/models/%s_spec.rb", "spec/models/%s_spec.rb"], | |
| "related": "db/schema.rb#%p", | |
| "template": "class %S\nend" | |
| }, | |
| "spec/factories/*_factory.rb": { |
zph
/ aliases.sh
Created
February 15, 2013 03:32
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| ..='cd ..' | |
| ...='cd ../..' | |
| ....='cd ../../..' | |
| .....='cd ../../../..' | |
| ......='cd ../../../../..' | |
| a='fasd -a' | |
| ack='noglob ack -i --nogroup' | |
| ai='$(fasd -sia)' | |
| autojump='nocorrect autojump' | |
| b=bg |
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| #!/usr/bin/env ruby | |
| rss = '.+?Rss:\s+(\d+)' | |
| share = '.+?Shared_Clean:\s+(\d+)' | |
| share << '.+?Shared_Dirty:\s+(\d+)' | |
| priv = '.+?Private_Clean:\s+(\d+)' | |
| priv << '.+?Private_Dirty:\s+(\d+)' | |
| MEM_REGEXP = /\[heap\]#{rss}#{share}#{priv}/m | |
| def mem_usage_linux |
mmrwoods
/ example_migration.rb
Created
October 26, 2010 16:38
Rails migration helper for dealing with large tables in MySQL
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| require "mysql_big_table_migration_helper" | |
| class AddIndexOnSomeColumnToSomeTable < ActiveRecord::Migration | |
| extend MySQLBigTableMigrationHelper | |
| def self.up | |
| add_index_using_tmp_table :some_table, :some_column | |
| end |
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