rcanepa

#!/bin/sh

# This pre-commit hook will prevent you from committing any line (or filename) containing
# the string NOCOMMIT. Use that tag in comments around source code you want to avoid
# accidentally committing, like temporary IP addresses or debug printfs.
#
# To add it to an existing repository, save it to .git/hooks/pre-commit (or append, if
# that file already exists). Remember to make executable (chmod +x ...)
#
# To automatically add this pre-commit hook to every repository you create or clone:

rcanepa

What is this?

Following this guide will set up a local Elasticsearch with Kibana and Marvel using Homebrew and Homebrew Cask

Prerequisites

If you already have Java installed on your system, skip steps Install Cask and Install Java

If you already have Java and Homebrew installed on your system, skip steps Prerequisites, start at Install Elasticsearch and Kibana after running $ brew update

Install Homebrew

• $ ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

rcanepa

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

rcanepa

// @flow
import React from 'react';
import styled from 'styled-components';

type GlobalCssValues = 'initial' | 'inherit' | 'unset';

type WrapValue = 'nowrap' | 'wrap' | 'wrap-reverse' | GlobalCssValues;

type JustifyValue =
  | 'center'

rcanepa

/**
 * Converts an RGB color value to HSL. Conversion formula
 * adapted from http://en.wikipedia.org/wiki/HSL_color_space.
 * Assumes r, g, and b are contained in the set [0, 255] and
 * returns h, s, and l in the set [0, 1].
 *
 * @param   Number  r       The red color value
 * @param   Number  g       The green color value
 * @param   Number  b       The blue color value
 * @return  Array           The HSL representation

rcanepa

someObservable.retry(3)

consts tasks = 
{
....{....5......2.......3...}
............{......5............4....3}
............................................{5...2...4}
.....................................................{...5}
}

rcanepa

const Price = (props) => {
    const price = props.children.toLocaleString('en', {
      style: props.showSymbol ? 'currency' : undefined,
      currency: props.showSymbol ? 'USD' : undefined,
      maximumFractionDigits: props.showDecimals ? 2 : 0,
    });
    
    return <span className={props.className}>{price}</span>
};

rcanepa

const Link = (props) => {
  let className = `link link--${props.theme}-theme`;
  
  if (!props.underline) className += ' link--no-underline';

  return <a href={props.href} className={className}>{props.children}</a>;
};

Link.propTypes = {
  theme: PropTypes.oneOf([

rcanepa

Git Commit Guidelines

We have very precise rules over how our git commit messages can be formatted. This leads to more readable messages that are easy to follow when looking through the project history. But also, we use the git commit messages to generate the AngularJS change log.

Commit Message Format

Each commit message consists of a header, a body and a footer. The header has a special format that includes a type, a scope and a subject:

rcanepa

# 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!