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Spreadsheet The primary object in Google Sheets that can contain multiple sheets, each with structured information contained in cells. A Spreadsheet resource represents every spreadsheet and has a unique spreadsheetId value, containing letters, numbers, hyphens, or underscores. You can find the spreadsheet ID in a Google Sheets URL:

https://docs.google.com/spreadsheets/d/spreadsheetId/edit#gid=0

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?

MySQL

Getting started

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

	package enum_example

	import (
	"bytes"
	"encoding/json"
	)

	// TaskState represents the state of task, moving through Created, Running then Finished or Errorred
	type TaskState int

	# Change YOUR_TOKEN to your prerender token
	# Change example.com (server_name) to your website url
	# Change /path/to/your/root to the correct value

	server {
	listen 80;
	server_name example.com;

	root /path/to/your/root;
	index index.html;

	<?php
	/**
	* Get download link of a Magento extension from MagentoConnect key
	*
	* Dependencies: Zend_Http_Client, Zend_Uri (Zend Framework)
	*/

	class Narno_Mage_Extension
	{
	protected $_key = null;