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@mikelehen
mikelehen / generate-pushid.js
Created February 11, 2015 17:34
JavaScript code for generating Firebase Push IDs
/**
* Fancy ID generator that creates 20-character string identifiers with the following properties:
*
* 1. They're based on timestamp so that they sort *after* any existing ids.
* 2. They contain 72-bits of random data after the timestamp so that IDs won't collide with other clients' IDs.
* 3. They sort *lexicographically* (so the timestamp is converted to characters that will sort properly).
* 4. They're monotonically increasing. Even if you generate more than one in the same timestamp, the
* latter ones will sort after the former ones. We do this by using the previous random bits
* but "incrementing" them by 1 (only in the case of a timestamp collision).
*/
@ktheory
ktheory / dd.log
Last active November 10, 2023 23:41
EC2 EBS-SSD vs instance-store performance on an EBS-optimized m3.2xlarge
# /tmp/test = EBS-SSD
# /mnt/test = instance-store
root@ip-10-0-2-6:~# dd bs=1M count=256 if=/dev/zero of=/tmp/test
256+0 records in
256+0 records out
268435456 bytes (268 MB) copied, 3.26957 s, 82.1 MB/s
root@ip-10-0-2-6:~# dd bs=1M count=256 if=/dev/zero of=/tmp/test
256+0 records in
256+0 records out
@hltbra
hltbra / get-inbound-and-egress-sg-rules.py
Last active November 15, 2018 12:04
Get AWS ingress and egress rules for a given security group
import boto
ec2 = boto.connect_ec2()
groups = ec2.get_all_security_groups()
def get_groups_that_have_ingress_rules_to(groups, group_id):
result = []
for group in groups:
for rule in group.rules:
for grant in rule.grants:
@liquidgecka
liquidgecka / cron_helper.sh
Last active September 28, 2023 15:35
Cron helper
#!/bin/bash
usage() {
cat << EOF
Usage: $0 [OPTION]... COMMAND
Execute the given command in a way that works safely with cron. This should
typically be used inside of a cron job definition like so:
* * * * * $(which "$0") [OPTION]... COMMAND
Arguments:
@rxaviers
rxaviers / gist:7360908
Last active May 3, 2024 16:14
Complete list of github markdown emoji markup

People

:bowtie: :bowtie: 😄 :smile: 😆 :laughing:
😊 :blush: 😃 :smiley: ☺️ :relaxed:
😏 :smirk: 😍 :heart_eyes: 😘 :kissing_heart:
😚 :kissing_closed_eyes: 😳 :flushed: 😌 :relieved:
😆 :satisfied: 😁 :grin: 😉 :wink:
😜 :stuck_out_tongue_winking_eye: 😝 :stuck_out_tongue_closed_eyes: 😀 :grinning:
😗 :kissing: 😙 :kissing_smiling_eyes: 😛 :stuck_out_tongue:
@sloria
sloria / bobp-python.md
Last active May 1, 2024 08:37
A "Best of the Best Practices" (BOBP) guide to developing in Python.

The Best of the Best Practices (BOBP) Guide for Python

A "Best of the Best Practices" (BOBP) guide to developing in Python.

In General

Values

  • "Build tools for others that you want to be built for you." - Kenneth Reitz
  • "Simplicity is alway better than functionality." - Pieter Hintjens
#!/home/rkitover/.rvm/rubies/ruby-2.0.0-p0/bin/ruby
require 'sinatra/base'
class MyApp < Sinatra::Base
get '/' do
'Hello, World!'
end
end
@roberto
roberto / _flash_messages.html.erb
Created August 13, 2012 22:47
Rails flash messages using Twitter Bootstrap
<% flash.each do |type, message| %>
<div class="alert <%= bootstrap_class_for(type) %> fade in">
<button class="close" data-dismiss="alert">×</button>
<%= message %>
</div>
<% end %>
@jbochi
jbochi / gist:3264872
Created August 5, 2012 13:41
POSCOMP 2012 - Conteúdos Programáticos por Área de Conhecimento

Área de Matemática

Álgebra Linear

Sistemas de Equações Lineares: método de eliminação de Gauss para sistemas lineares. Espaços vetoriais. Subespaços. Bases.

@surjikal
surjikal / graphite.md
Created May 17, 2012 18:14 — forked from caged/graphite.md
Installing Graphite on OS X Lion

Follow these steps to install graphite on OS X Lion.

Prerequisites

  • Python 2.7
  • Brew
  • Git

Install dependencies

Install Cairo