Filipe A Moreira filipeamoreira

Installing Nix on macOS in single-user mode

$ curl https://nixos.org/nix/install | sh

Story: Writing Scripts with Go

This is a story about how I tried to use Go for scripting. In this story, I’ll discuss the need for a Go script, how we would expect it to behave and the possible implementations; During the discussion I’ll deep dive to scripts, shells, and shebangs. Finally, we’ll discuss solutions that will make Go scripts work.

Why Go is good for scripting?

While python and bash are popular scripting languages, C, C++ and Java are not used for scripts at all, and some languages are somewhere in between.

How to force a file download in the browser?

The use case is simple, you have /reports/593874951.pdf on your web server and want to let your user download it — and if possible with a meaningful name.

In the past, you may tried using the Content-Disposition HTTP header to achieve this, but today, with Safari getting the support for the download attribute it’s going to simplify a lot of things.

Using the download attribute is simple as pie:

<a href="/reports/593874951.pdf" download="report.pdf">
 Download report

First, add pry-rails to your Gemfile:
https://github.com/rweng/pry-rails

gem 'pry-rails', group: :development

Then you'll want to rebuild your Docker container to install the gems

	bind -T root F12 \
	set prefix None \;\
	set key-table off \;\
	set status-style "fg=$color_status_text,bg=$color_window_off_status_bg" \;\
	set window-status-current-format "#[fg=$color_window_off_status_bg,bg=$color_window_off_status_current_bg]$separator_powerline_right#[default] #I:#W# #[fg=$color_window_off_status_current_bg,bg=$color_window_off_status_bg]$separator_powerline_right#[default]" \;\
	set window-status-current-style "fg=$color_dark,bold,bg=$color_window_off_status_current_bg" \;\
	if -F '#{pane_in_mode}' 'send-keys -X cancel' \;\
	refresh-client -S \;\

	bind -T off F12 \

	# LVDB - LLOOGG Memory DB
	# Copyriht (C) 2009 Salvatore Sanfilippo <[email protected]>
	# All Rights Reserved

	# TODO
	# - cron with cleanup of timedout clients, automatic dump
	# - the dump should use array startsearch to write it line by line
	# and may just use gets to read element by element and load the whole state.
	# - 'help','stopserver','saveandstopserver','save','load','reset','keys' commands.
	# - ttl with milliseconds resolution 'ttl a 1000'. Check ttl in dump!

	<html>
	<script>
	var db = openDatabase('watch','1.0','watch',104857600);

	db.transaction(function(t) {
	t.executeSql("CREATE TABLE IF NOT EXISTS events(time DATETIME, duration INTEGER, url TEXT);", []);
	});

	var event = null;
	function eventclose(e) {

	/*
	This snippet is an example of backpressure implementation in Go.
	It doesn't run in Go Playground, because it starts an HTTP Server.

	The example starts an HTTP server and sends multiple requests to it. The server starts denying
	requests by replying an "X" (i.e. a 502) when its buffered channel reaches capacity.

	This is not the same as rate-limiting; you might be interested in https://github.com/juju/ratelimit
	or https://godoc.org/golang.org/x/time/rate.

	function createStore (reducers) {
	var state = reducers()
	const store = {
	dispatch: (action) => {
	state = reducers(state, action)
	},
	getState: () => {
	return state
	}
	}

	-- A global variable for the Hyper Mode
	k = hs.hotkey.modal.new({}, "F17")

	-- Trigger existing hyper key shortcuts

	k:bind({}, 'm', nil, function() hs.eventtap.keyStroke({"cmd","alt","shift","ctrl"}, 'm') end)

	-- OR build your own

	launch = function(appname)