TheWaWaR

#coding: utf-8

import json

import requests


class Slack(object):
    """
    References:

Frozenfire92

## Java
sudo apt-get update
sudo apt-get install default-jdk

## Scala
sudo apt-get remove scala-library scala
sudo wget http://scala-lang.org/files/archive/scala-2.12.1.deb
sudo dpkg -i scala-2.12.1.deb
sudo apt-get update
sudo apt-get install scala

katopz

# Install Docker on Ubuntu 14.04.4 x64
# Ref https://docs.docker.com/engine/installation/linux/ubuntulinux/
# No interactive for now.
export DEBIAN_FRONTEND=noninteractive
# Update your APT package index.
sudo apt-get -y update
# Update package information, ensure that APT works with the https method, and that CA certificates are installed.
sudo apt-get -y install apt-transport-https ca-certificates
# Add the new GPG key.
sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D

GLMeece

Latency Comparison Numbers

Note: "Forked" from Latency Numbers Every Programmer Should Know

Event	Nanoseconds	Microseconds	Milliseconds	Comparison
L1 cache reference	0.5	-	-	-
Branch mispredict	5.0	-	-	-
L2 cache reference	7.0	-	-	14x L1 cache
Mutex lock/unlock	25.0	-	-	-

5agado

jakevdp

ruanbekker

My Elasticsearch cheatsheet with example usage via rest api (still a work-in-progress)

Shortlinks:

• Cluster Health
  • Index Level
  • Shard Level
• Nodes Overview
• Indices Overview
• Cluster Maintenance

atinux

const waitFor = (ms) => new Promise(r => setTimeout(r, ms))
const asyncForEach = async (array, callback) => {
  for (let index = 0; index < array.length; index++) {
    await callback(array[index], index, array)
  }
}

const start = async () => {
  await asyncForEach([1, 2, 3], async (num) => {
    await waitFor(50)

lxneng

#!/bin/sh
# script to convert mysql schema to be compatible with data warehouse software
# make sure that s3cmd and maatkit utility is installed

db_name=${1:-'test'}
> /root/$db_name.txt

temppath='/mnt/data/pdump1'
host='localhost'
user='maatkit'

tylerzey

let re;

//this looks for the string between the slashes. it'll match hello but not HeLlo.
re = /hello/;
//the lower case i means be case insensitive. this will match HellO.
re = /hello/i;


// explaination for common search characters