alexkahn

var cache = require('memjs').Client.create();
var Location = require('models/Location');
var Report = require('models/Report');

cache.get('locationCount', function(err, value) {
  // memjs doesn't throw an error if the key doesn't exist.
  // but both err and value will be null.
  if (err === null && value === null) {
    Location.count( function(err, count) {
      // todo: handle errors

alexkahn

// function example
// make a sum function that takes an array
// but it assumes the array will contain numbers
function sum(values) {
  if (!(values instanceof Array)) {
    throw new Error('Values must be an array');
  }
  var i = 0;
  var l = values.length;
  var total = 0;

alexkahn

A quick note on functions

After our discussion on Wednesday, I wanted to make sure the information was presented in a nice way.

We left off talking about functions and what they do, either named or anonymous.

We also mentioned the idea of scope: so here are some examples and ideas to help get that all to sink in (hopefully).

alexkahn

"""
This goes at the top of every file.
"""
# -*- coding: utf-8 -*-

"""
Python 3 has it SOoOo easy...
"""
from __future__ import unicode_literals

alexkahn

function Character(name, health, strength) {
  this.name = name;
  this.health = health;
  this.strength = strength;
}

Character.prototype.attack = function attack(target) {
  if (this.health > 0) {
      var damage = this.strength;
      console.log(this.name + " is attacking " + target.name + " and deals " + damage + " damage points");

alexkahn

from .forms import AccountCreationForm


class IndexView(TemplateView):
    template_name = 'myapp/mytemplate.html'

    def get_context_data(self, **kwargs):
        ctx = super(IndexView, self).get_context_data(**kwargs)
        # you can use any query param key you'd like...
        ctx['form'] = AccountCreationForm(initial={'promotion_code': self.request.GET.get('c', '')})

alexkahn

var header = document.getElementsByTagName('header');
var range = 200;

window.addEventListener('scroll', opacityHandler, false)

function opacityHandler() {
    var scrollTop = $(this).scrollTop();
    var offset = header.offset().top;
    var height = header.outerHeight();
    

alexkahn

Getting Started with Node.js

This short guide will get you familiar with Node.js so we can go do some fun stuff.

Installation

OSX

brew install node

*nix

apt-get install node yum install node

alexkahn

var hoursLocations = [{
  'days': 'mondays',
  'times': '11AM - 3PM',
  'location': 'City Hall Plaza - Fisher Park'
 },
 {
  'days': 'TUESDAYS & THURSDAYS',
  'times': "11AM - 3PM",
  'location': "South End - Harrison Avenue and East Concord Street by BMC"
 },

alexkahn

var markerInfo = [
        //MONDAYS
    {
    "location": "City Hall Plaza - Fisher Park",       "latitude": "42.360082",
    "longitude": "-71.058880",
    "day": "Mondays"
    },
        // TUESDAYS & THURSDAYS
        {
    "location": "South End - Harrison Avenue and East Concord Street by BMC",