Terje Larsen terlar

This document contains some ideas for additions to the Nix language.

Motivation

The Nix package manager, Nixpkgs and NixOS currently have several problems:

Poor discoverability of package options. Package functions have function arguments like enableFoo, but there is no way for the Nix UI to discover them, let alone to provide programmatic ways to

CheatSheet for DynamoDB

Creating Data

PutItem – Writes a single item to a table. You must specify the primary key attributes, but you don't have to specify other attributes.

BatchWriteItem – Writes up to 25 items to a table. This is more efficient than calling PutItem multiple times because your application only needs a single network round trip to write the items. You can also use BatchWriteItem for deleting multiple items from one or more tables.

Reading Data

GetItem – Retrieves a single item from a table. You must specify the primary key for the item that you want. You can retrieve the entire item, or just a subset of its attributes.

BatchGetItem – Retrieves up to 100 items from one or more tables. This is more efficient than calling GetItem multiple times because your application only needs a single network round trip to read the items.

Rich Already Answered That!

A list of commonly asked questions, design decisions, reasons why Clojure is the way it is as they were answered directly by Rich (even when from many years ago, those answers are pretty much valid today!). Feel free to point friends and colleagues here next time they ask (again). Answers are pasted verbatim (I've made small adjustments for readibility, but never changed a sentence) from mailing lists, articles, chats.

How to use:

The link in the table of content jumps at the copy of the answer on this page.
The link on the answer itself points back at the original post.

Table of Content

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

What's an Effective Engineer?

→ Great great documentation about all this (so much better): https://github.com/drduh/YubiKey-Guide

Using Yubikey (PIV on osx, etc.)

Documentation for PIV: https://github.com/Yubico/yubikey-piv-manager/tree/master/doc

To manage the certificates: https://www.yubico.com/support/knowledge-base/categories/articles/unpair-yubikey-piv-login-macos-sierra/

Using GPG key

Thoughts after 6 months of literate programming

I wrote my first literate program in November of 2015. Since then, I've been writing literate programs on an almost daily basis. It has been an experience with a sort of enlightenment that I haven't had in a long time. Not only is it a lot of fun to write literate programs, I feel like I have gained a new "super power" of sorts.

Below are my thoughts on my experiences with literate programming so far.

	{ config, lib, pkgs, ...}:

	with lib;

	let
	cfg = config.services.batteryNotifier;
	in {
	options = {
	services.batteryNotifier = {
	enable = mkOption {

	#!/bin/bash

	if [ $# -ne 3 ]; then
	echo "usage: $0 <unix socket file> <host> <listen port>"
	exit
	fi

	SOCK=$1
	HOST=$2
	PORT=$3

	#! /usr/bin/env python3
	"""Fixing bluetooth stereo headphone/headset problem in debian distros.

	Workaround for bug: https://bugs.launchpad.net/ubuntu/+source/indicator-sound/+bug/1577197
	Run it with python3.5 or higher after pairing/connecting the bluetooth stereo headphone.

	This will be only fixes the bluez5 problem mentioned above .

	Licence: Freeware

	function fish_mode_prompt --description 'Displays the current mode'
	# Do nothing if not in vi mode
	if test "$fish_key_bindings" = "fish_vi_key_bindings"
	switch $fish_bind_mode
	case default
	set_color --bold red
	echo 🅽
	case insert
	set_color --bold green
	echo 🅸