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@lukas-vlcek
lukas-vlcek / gist:5143799
Last active February 7, 2023 21:50
Adding a new analyzer into existing index in Elasticsearch (requires close/open the index). Tested with Elasticsearch 0.19.12.
// create an index with an analyzer "myindex"
curl -X PUT localhost:9200/myindex -d '
{
"settings" : {`
"index":{
"number_of_replicas":0,
"number_of_shards":1,
"analysis":{
"analyzer":{
"first":{

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns                     on recent CPU
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 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 4X memory

@henrik
henrik / hash_deep_diff.rb
Created July 14, 2009 08:38
Recursively diff two Ruby hashes.
# Recursively diff two hashes, showing only the differing values.
# By Henrik Nyh <http://henrik.nyh.se> 2009-07-14 under the MIT license.
#
# Example:
#
# a = {
# "same" => "same",
# "diff" => "a",
# "only a" => "a",
# "nest" => {
#!/bin/bash
#
# MongoDB Backup Script
# VER. 0.1
# Note, this is a lobotomized port of AutoMySQLBackup
# (http://sourceforge.net/projects/automysqlbackup/) for use with
# MongoDB.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
@duncansmart
duncansmart / progressive-ace.htm
Created March 28, 2013 23:29
Integrating ACE Editor in a progressive way
<textarea name="my-xml-editor" data-editor="xml" rows="15"></textarea>
...
<textarea name="my-markdown-editor" data-editor="markdown" rows="15"></textarea>
...
<script src="//d1n0x3qji82z53.cloudfront.net/src-min-noconflict/ace.js"></script>
<script>
// Hook up ACE editor to all textareas with data-editor attribute
$(function () {
@stefansundin
stefansundin / install-pre-commit.sh
Last active September 17, 2023 11:46
Git pre-commit check to stop accidental commits to master/main/develop branches.
#!/bin/bash
# This gist contains pre-commit hooks to prevent you from commiting bad code or to the wrong branch.
# There are six variants that I have built:
# - pre-commit: stops commits to master/main/develop branches.
# - pre-commit-2: also includes a core.whitespace check.
# - pre-commit-3: the core.whitespace check and an EOF-newline-check.
# - pre-commit-4: only the core.whitespace check.
# - pre-commit-5: elixir formatting check.
# - pre-commit-6: prettier formatting check.
# Set the desired version like this before proceeding:
@rtgibbons
rtgibbons / logger.js
Created November 7, 2013 13:51
Logger Library with winston
var app = require(process.cwd() + '/app');
var winston = require('winston');
var _ = require('lodash');
// Set up logger
var customColors = {
trace: 'white',
debug: 'green',
info: 'green',
warn: 'yellow',
@andy-thomason
andy-thomason / Genomics_A_Programmers_Guide.md
Created May 14, 2019 13:32
Genomics a programmers introduction

Genomics - A programmer's guide.

Andy Thomason is a Senior Programmer at Genomics PLC. He has been witing graphics systems, games and compilers since the '70s and specialises in code performance.

https://www.genomicsplc.com

@rbq
rbq / docker.yaml
Last active October 19, 2023 11:57
Install Docker CE on Ubuntu using Ansible
---
- hosts: all
tasks:
- name: Install prerequisites for Docker repository
apt:
name: ['apt-transport-https', 'ca-certificates', 'curl', 'gnupg2', 'software-properties-common']
update_cache: yes
- name: Add Docker GPG key
apt_key:
@atika
atika / pushover
Last active October 20, 2023 19:37
Send a pushover notification from Bash
#!/bin/bash
# ./pushover.sh -t "Pushover via Bash" -m "Pushover message sent with bash from $(hostname -f)" -p1 -s siren -u http://www.google.com -n "Google"
USER_TOKEN=YOUR_USER_TOKEN_HERE
# YOUR APPS TOKENS / UPPERCASE NAME WITH _TOKEN (usage: "-a monitor" uses MONITOR_TOKEN)
MONITOR_TOKEN=APP_TOKEN
BACKUP_TOKEN=APP_TOKEN
ALERT_TOKEN=APP_TOKEN
APP_LIST="monitor, backup, alert" # FOR USAGE