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// When I was working on our React/Flummox app I got to the point where, per the docs, I had ~100 lines of code
// which were substantially predictable boilerplate, so I used some JS metaprogramming to condense them by 80%.

// Flummox docs: http://acdlite.github.io/flummox

// I use underscore.js below for utility but you can also just do a for loop.

class AppFlux extends Flux {

  constructor() {

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// The wrong way to do things:

for {
	switch {
	case <- channelA:
  		doSomething()
 	case <- channelB:
 		doSomethingElse()
 	default:
 	// Do nothing.

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#The task is replacing the port number in the URL string

//in golang
import "fmt"
import "strings"

func main() {
        url := "http://localhost:8080/foo/bar"
        fmt.Println(strings.Replace(url, "8080", "8181", -1))
}

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#In Golang

package main

import (
	"fmt"
	"regexp"
)

func main() {

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cd /tmp

curl -o git-2.2.1.tar.gz "https://www.kernel.org/pub/software/scm/git/git-2.2.1.tar.gz"
curl -o git-2.2.1.tar.sign "https://www.kernel.org/pub/software/scm/git/git-2.2.1.tar.sign"

# if you want to verify the tar signature
gpg --keyserver hkp://keys.gnupg.net --recv-keys 96AFE6CB
gunzip git-2.2.1.tar.gz
gpg --verify git-2.2.1.tar.sign

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Notes

This is the latest version of an email which I send periodically, offering customers the opportunity to pre-pay for SaaS in return for a discount. The benefits to the SaaS company are better cash flow and reduced churn rate. The benefits to the customer are, well, in the email. This genre of email has produced hundreds of thousands of dollars in pre-pays for some companies I work with, and it rarely requires any more work than this example.

I've put $79 is as a placeholder for the cost of the user's plan. We calculate that for each account, naturally, along with the billing contact's name.

Subject: Save $79 on Appointment Reminder (and get a tax write-off) Formatting: 100% plain text. Gmail automatically links up the central link. From: Patrick McKenzie (Appointment Reminder) patrick@appointmentreminder.org

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#This Rake task fires every 5 minutes, checking for a particular symptom which signals a critical problem.
#If it finds it, it calls Patrick's cell phone.
#This could probably be done with PagerDuty or similar, but since I already had a Twilio account...

desc "Emails sysadmin if reminders are not going out"
  task :check_for_emergency => :environment do
    begin
      had_emergency = Reminder.check_for_emergency!  #Application code checks for a symptom of a critical problem.  
      if (had_emergency)
        twimlet_url = "http://twimlets.com/message?Message%5B0%5D=Appointment%20reminder%20reminders%20in%20processing%20or%20scheduled.%20Appointment%20reminder%20reminders%20in%20processing%20or%20scheduled.%20Appointment%20reminder%20reminders%20in%20processing%20or%20scheduled."

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require 'rubygems'
require 'httparty'
require 'fileutils'
require 'json'

USERNAME = ARGV[0] || "patio11"
MAX_TO_FETCH = ARGV[1]

puts "Username: #{USERNAME} max to fetch: #{MAX_TO_FETCH || "all"}"

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List<Student> studentsWhoHaveNotTakenAtLeastOneTest() {
  List<Student> allStudents = this.getStudents().clone(); /* shallow copy to avoid mutation */
  Iterator<Student> studentIt = allStudents.iterator();

  /* select down to students missing at least one test */
  List<Student> studentsMissingAtLeastOneTest = new ArrayList<Student>();

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$MY_PHONE_NUMBERS = []  #Fill this out!

if RAILS_ENV != "production"
  require 'twilio'
  Twilio::Call.class_eval do
    alias_method :old_make, :make

    def make(caller, callee, url, options = {})
      unless $MY_PHONE_NUMBERS.map {|num| num.gsub(/[^0-9+]/, "")}.include? callee.gsub(/[^0-9+]/, "")
        raise "Trying to call a number which you do not own.  (Safety measure for non-production environments.)"