jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

omarish

Priceonomics Programming Puzzle, Summer 2012

We love solving puzzles at Priceonomics. We also like meeting people who like to solve puzzles. Here are two interesting puzzles we've faced at some point in the past months that we'd like to share with you.

If you have any questions, contact omar@priceonomics.com.

Puzzle 1: Heatwave

kevin-smets

Default

Powerlevel10k

octocat

# Compiled source #
###################
*.com
*.class
*.dll
*.exe
*.o
*.so

# Packages #

wikimatze

I heard from GitHub Two-Factor Authentication](https://github.com/blog/1614-two-factor-authentication) nearly a couple of days ago when I was reading my RSS feed. I enabled it and couldn' push to any of my repositories anymore. Learn in this blog post how to fix it.

Two-Factor Authentication

"Is a process involving two stages to verify the identity of an entity trying to access services in a computer or in a network". Github solves this authentication with sending an SMS to a device which wants to push to their platform.

Enabling Two-Factor Authentication

mikaelbr

// === Arrays

var [a, b] = [1, 2];
console.log(a, b);
//=> 1 2


// Use from functions, only select from pattern
var foo = () => [1, 2, 3];

natelandau

#  ---------------------------------------------------------------------------
#
#  Description:  This file holds all my BASH configurations and aliases
#
#  Sections:
#  1.   Environment Configuration
#  2.   Make Terminal Better (remapping defaults and adding functionality)
#  3.   File and Folder Management
#  4.   Searching
#  5.   Process Management

alexhawkins

'use strict';

function BinarySearchTree() {
    this.root = null;
}

BinarySearchTree.prototype.makeNode = function(value) {
    var node = {};
    node.value = value;
    node.left = null;

daneden

How to remap the caps lock key to the emoji selector on Mac

1. Go to System Preferences -> Keyboard -> Modifier Keys...
2. Change “Caps Lock” to “No action”
3. Install Seil
4. Change the Caps Lock key in Seil to keyCode 80 (F19)
5. Install Karabiner
6. Open Karabiner and go to Misc & Uninstall -> Open private.xml
7. Copy the contents of this gist's example to the XML file and save
8. In Karabiner, go to Change Keys -> Reload XML

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?