limitusus

Problem

Want to create a calculated item with last("X") / last("Y"). When Y = 0, the result should be 0.

Answer

last("X") * (1 - count("Y",#1,0)) / (last("Y") + count("Y",#1,0))

ageis

bitcoind-monitor.py

This is a script written in Python intended to run alongside a Bitcoin node and export statistics for monitoring purposes. It assumes the existence of bitcoin-cli in the PATH and access to the RPC interface over localhost.

It tracks stuff like: block height, difficulty, number of peers, network hash rate, errors, uptime in seconds, mempool size, size of recent blocks, number of transactions within blocks, chaintips, total bytes received and sent, and transaction inputs and outputs. These Bitcoin metrics are refreshed once every 5 minutes.

How it works

Prometheus is a monitoring system and time-series database.

dbkbali

CREATE AGGREGATE vector_sum (
    sfunc = AXH_Vector_Sum,
    basetype = int[],
    stype = int[],
    initcond = '{0}'
);

DROP FUNCTION IF EXISTS AXH_Vector_Sum(int[], int[]);
CREATE OR REPLACE FUNCTION AXH_Vector_Sum(int[], int[]) 
    RETURNS int[] AS $$

maxivak

Sending emails with ActionMailer and Sidekiq

Send email asynchroniously using Sidekiq.

ActionMailer

Create your mailer us usual:

hallahan

Preliminary Packages

Make sure you have done sudo apt-get update and sudo apt-get upgrade on your fresh install. This guide is geared toward Ubuntu 14.04 LTS (Trusty Tahr). Most of the guide will work for earlier versions of Ubuntu with some slight changes, but 14.04 is advised.

Enable the root user

sudo cp /home/ubuntu/.ssh/authorized_keys /root/.ssh/

dommmel

# -*- mode: ruby -*-
# vi: set ft=ruby :

$script = <<SCRIPT
set -e
set -x

cd
sudo apt-get update -y
sudo apt-get install \

gertig

class MyCustomCell < UITableViewCell

  # This method is used by ProMotion to instantiate cells.
  def initWithStyle(style_name, reuseIdentifier: reuseIdentifier)
    super
     stylish
    self
  end
  
  # A delegate method when the user clicks the Row(it's blue by default)

scottatron

upstream unicorn {
  server unix:/tmp/unicorn.<%= application %>.sock fail_timeout=0;
}

server {
  listen 80 default deferred;
  # server_name example.com;
  root <%= current_path %>/public;
  
  if (-f $document_root/system/maintenance.html) {

erikh

#!/usr/bin/env sh

##
# This is script with usefull tips taken from:
#   https://github.com/mathiasbynens/dotfiles/blob/master/.osx
#
# install it:
#   curl -sL https://raw.github.com/gist/2108403/hack.sh | sh
#

lagartoflojo

Backbone.Model::nestCollection = (attributeName, nestedCollection) ->
  #setup nested references
  for item, i in nestedCollection
    @attributes[attributeName][i] = nestedCollection.at(i).attributes

  #create empty arrays if none
  nestedCollection.bind 'add', (initiative) =>
    if !@get(attributeName)
      @attributes[attributeName] = []
    @get(attributeName).push(initiative.attributes)