Tim Siwula timxor

macOS Internals

Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details.

Starting Points

How to use this gist

You've got two main options:

Overview

Syncing an Ethereum node is largely reliant on latency and IOPS, I/O Per Second, of the storage. Budget SSDs will struggle to an extent, and some won't be able to sync at all. IOPS can roughly be used as proxy of / predictor for latency. Measuring latency directly is arguably better.

This document aims to snapshot some known good and known bad models.

The drive lists are ordered by interface and then by capacity and alphabetically by vendor name, not by preference. The lists are not exhaustive at all. @mwpastore linked a filterable spreadsheet in comments that has a far greater variety of drives and their characteristics. Filter it by DRAM yes, NAND Type TLC, Form Factor M.2, and desired capacity.

For size, 4TB is a very conservative choice. The smaller 2TB drive should last an Ethereum full node until at least sometime 2026, with the [pre-merge history expiry](https://hackmd.io/@hBXHLw_9Qq2va4pRt

How a block gets added to the chain in quorum

This lives in the quorum repo now

Edit 8/14/18: See https://ethereum-tests.readthedocs.io/en/latest/ for more updated information. Much of the links below are still valuable though.

Welcome

This guide is intended to provide resources for those wanting to help test Metropolis EIPs. The CPP team is currently in the middle of a migration from EthDocs to a documentation site that is more dedicated to CPP-Ethereum so the documentation on creating tests for Ethereum using testeth is scattered. Everything you will need to get started should be compiled below.

Suggested skill sets needed to create and run tests

Ability to compile/build testeth and LLL compiler or run a docker file.
Ability to [understand the LLL Ethereum language](https://gist.github.com/Souptacular/fd197b1fac7c6d2660b0bef27a33ed40#lll-and-evm-st

What I Wish I'd Known About Equity Before Joining A Unicorn

Disclaimer: This piece is written anonymously. The names of a few particular companies are mentioned, but as common examples only.

This is a short write-up on things that I wish I'd known and considered before joining a private company (aka startup, aka unicorn in some cases). I'm not trying to make the case that you should never join a private company, but the power imbalance between founder and employee is extreme, and that potential candidates would

Node.js HTTP receiving request dump server

HTTP server which receives requests and dumps them to a flat file.

Usage

Start HTTP server:

$ nodejs ./httprequestdump.js

Use curl to get the JSON response for the latest release
Use grep to find the line containing file URL
Use cut and tr to extract the URL
Use wget to download it

curl -s https://api.github.com/repos/jgm/pandoc/releases/latest \
| grep "browser_download_url.*deb" \
| cut -d : -f 2,3 \
| tr -d \" \

	<video id="player" autoplay muted playsinline> </video>
	<button id="capture">Capture</button>
	<canvas id="canvas" width=320 height=240></canvas>
	<script>
	const player = document.getElementById('player');
	const canvas = document.getElementById('canvas');
	const context = canvas.getContext('2d');
	const captureButton = document.getElementById('capture');

	const constraints = {

	# on macos in directory:
	# ~/Library/Application\ Support/Zcash/zcash.conf

	rpcuser=username
	rpcpassword=`head -c 32 /dev/urandom \| base64`

	### connect to main network
	# mainnet=1
	# addnode=mainnet.z.cash

	#!/usr/bin/env bash

	# fetch_nike_puls_all_activities.bash
	# A simple bash script to fetch all activities and metrics from NikePlus.
	# See `nike_plus_api.md` for the API details.

	readonly bearer_token="$1"
	if [[ -z "$bearer_token" ]]; then
	echo "Usage: $0 bearer_token"
	exit