jmglov

defmodule Config do
  defmacro __using__(_) do
    quote do
      import unquote(__MODULE__), only: :macros
    end
  end

  defmacro cfg(key, type \\ :string) do
    quote do
      defp unquote(key)() do

chadfurman

Coffee-Shop Development for Under $500

Do you have a great desktop, but don't want to shell out premium dollars for a MacBook Pro, only to have security concerns around your beautiful laptop getting stolen? If you feel great when you accomplish something complex, and you want a super-inexpensive backup computer that gives you both freedom and power to develop from your favorite cafe, read on!

In the early days, web development meant local file changes which were sent to the server via FTP. Shelling into the remote server directly was rarely ideal – but technology has come a long way. Chromebooks, starting around $170, have up to 13 hours of battery life and weigh just about 2 lbs. The operating system is designed to run a web browser and nothing else: even your file storage is in the cloud. Enter Cloud9.

Cloud9's web-based IDE is strikingly powerful, feature-rich, and performant on a Chromebook 11. C9 has Goto Anything, rather comprehensive Vim support, and many other power-user accessories. While t

henrik

ExUnit.start()

defmodule CompileTimeAssertions do
  defmacro assert_compile_time_raise(expected_exception, expected_message, fun) do
    # At compile-time, the fun is in AST form and thus cannot raise.
    # At run-time, we will evaluate this AST, and it may raise.
    fun_quoted_at_runtime = Macro.escape(fun)

    quote do
      assert_raise unquote(expected_exception), unquote(expected_message), fn ->

alexander-yakushev

%% Copyright 2020 Alexander Yakushev
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3
% of this license or (at your option) any later version.
% The latest version of this license is in
%   http://www.latex-project.org/lppl.txt
% and version 1.3 or later is part of all distributions of LaTeX
% version 2005/12/01 or later.
%

steveklabnik

My summary of https://www.youtube.com/watch?v=IqrwPVtSHZI

TL;DR:

Rails has a library, ActiveSupport, which adds methods to Ruby core classes. One of those methods is String#blank?, which returns a boolean (sometimes I miss this convention in Rust, the ?) if the whole string is whitespace or not. It looks like this: https://github.com/rails/rails/blob/b3eac823006eb6a346f88793aabef28a6d4f928c/activesupport/lib/active_support/core_ext/object/blank.rb#L99-L117

It's pretty slow. So Discourse (which you may know from {users,internals}.rust-lang.org) uses the fast_blank gem, which provides this method via a C implementation instead. It looks like this: https://github.com/SamSaffron/fast_blank/blob/master/ext/fast_blank/fast_blank.c

For fun, Yehuda tried to re-write fast_blank in Rust. Which looks like this:

fogus

Mind expanding programming languages

• C
  • http://c2.com/cgi/wiki?CeeLanguage
• Common Lisp (via LISP)
  • http://www.lispworks.com/documentation/HyperSpec/Front/index.htm
  • https://github.com/readevalprintlove/lithp
• Dedalus (via Datalog)
  • http://www.eecs.berkeley.edu/Pubs/TechRpts/2009/EECS-2009-173.html

• http://www.learndatalogtoday.org/

stevedomin

defmodule MyBlog.Repo.Migrations.CreatePost do
  use Ecto.Migration

  def change do
    create table(:posts, primary_key: false) do
      add :id, :uuid, primary_key: true
      add :body, :string
      add :word_count, :integer

      timestamps

logaan

(require 'vlad.core)

(def rules
  (join (attr [:name] present)
        (attr [:message] present)))

(def names
  {[:name]    "Name"
   [:message] "Message"})

ryanflorence

var pureRender = (Component) => {
  Object.assign(Component.prototype, {
    shouldComponentUpdate (nextProps, nextState) {
      return !shallowEqual(this.props, nextProps) ||
             !shallowEqual(this.state, nextState);
    }
  });
};

module.exports = pureRender;

elado

# in spec_helper.rb

RSpec.configure do |config|
  records = []

  config.before :suite do
    Cequel::Record.descendants.each do |klass|
      klass.after_create {|r| records << r }
    end
  end