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To uninstall the Heroku Toolbelt on OSX (non-Homebrew) or Standalone Linux install:

rm -rf /usr/local/heroku
rm -rf ~/.heroku

For Homebrew:

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get '/user/:id' do |user_id|
  user = db.find_user(user_id)
  return user
end

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app.get('/user/:id', function (req, res) {
  db.get(req.params.userId, function (err, user) {
    if (err) throw err;
    res.json(user);
  });
});

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yum update -y
yum install -y git nodejs npm vim
npm install -g n
n stable
node --version
git --version

vim /etc/yum.repos.d/mongodb.repo
[mongodb]
name=MongoDB Repository

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yum update -y
yum install -y git nodejs npm vim
npm install -g n
n stable
node --version
git --version

vim /etc/yum.repos.d/mongodb.repo
#[mongodb]
#name=MongoDB Repository

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yum update -y
yum install -y git nodejs npm vim
npm install -g n
n stable
node --version
git --version

vim /etc/yum.repos.d/mongodb.repo
#[mongodb]
#name=MongoDB Repository

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#!/usr/bin/env bash

cd ~/src

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Error checking with callbacks:

dbFind('foo', function(err, data) {
  if (err) throw err;
  dbFind(data.id, function(err, data) {
    if (err) throw err;
    dbFind(data.id, function(err, data) {
      if (err) throw err;
 dbFind(data.id, function(err, data) {

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'use strict';
var numCpus = require('os').cpus().length
var cluster = require('cluster')

cluster.setupMaster({exec: __dirname + '/server.js'})

// workerIds returns the node cluster index for each worker
function workerIds() { return Object.keys(cluster.workers) }

// Gets the count of active workers

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var gulp = require('gulp')
var concat = require('gulp-concat')
var sourcemaps = require('gulp-sourcemaps')
var uglify = require('gulp-uglify')
var ngAnnotate = require('gulp-ng-annotate')

gulp.task('js', function () {
  gulp.src(['src/**/module.js', 'src/**/*.js'])
    .pipe(sourcemaps.init())
      .pipe(concat('app.js'))