crueber

trim_the_fat = (str) -> str.replace(/\D+/g, '')
numerals_only = /[^0-9]+/
double_sum_array = [0, 2, 4, 6, 8, 1, 3, 5, 7, 9]

is_valid_credit_card = (card_number) ->
  card_number = trim_the_fat(card_number)
  return false if card_number.length < 13 or numerals_only.test(card_number)

  len = card_number.length
  sum = 0

crueber

# NodeJS Asset Helper.
fs = require 'fs'

asset_dir = './public/assets/'

pull_assets_manifest = ->
  fs.readFile asset_dir+'manifest.json', (err, file) ->
    koaris.locals.assets = JSON.parse(file)
    console.log "Refreshing Asset Manifest"
pull_assets_manifest()

crueber

PRE_AND_POST_UNDERSCORES = /^_+|_+$/g 
EMAIL = /^[a-z0-9!#$%&'*+\/=?^_`{|}~.-]+@[a-z0-9]([a-z0-9-]*[a-z0-9])?(\.[a-z0-9]([a-z0-9-]*[a-z0-9])?)*$/i
URL = /^(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?$/

# HTML Based
SINGLE_TAG = /^<(\w+)\s*\/?>(?:<\/\1>|)$/
HTML = /<|&#?\w+;/
TAG_NAME = /<([\w:]+)/;
XHTML_TAG = /<(?!area|br|col|embed|hr|img|input|link|meta|param)(([\w:]+)[^>]*)\/>/gi;

crueber

aba_check_digit = (t) ->
  7 * (t[0] + t[3] + t[6]) +
  3 * (t[1] + t[4] + t[7]) +
  9 * (t[2] + t[5])

aba_check_sum = (t) -> 
  3 * (t[0] + t[3] + t[6]) +
  7 * (t[1] + t[4] + t[7]) +
  1 * (t[2] + t[5] + t[8])

crueber

prodAssetHelpers = require("./middleware/prod_asset_helpers")

if app.get('env') == 'production'
  app.use express.static(path.join(__dirname, "/../public"), maxAge: constant.one_week)
  prodAssetHelpers(app, path.join(__dirname, "/../public"))
else
  app.use express.static(path.join(__dirname, "/../public"), maxAge: constant.one_second)
  app.use connectAssets(paths: [ "public/css", "public/js" ], helperContext: app.locals, build: false)

crueber

# Note on globals: _, app, logger, and Data are global. Everything else is standard node.
# npm libs: aws-sdk, mongoose, express, coffeescript, lo-dash... At least, where this came frome.
# Lo-dash could easily be replaced with a for-each, but I use it all over the place in my apps.

aws        = require 'aws-sdk'
aws.config.update accessKeyId: app.get('s3_access_key'), secretAccessKey: app.get('s3_secret_key')

sqs        = new aws.SQS(region: app.get('aws_region')) # aka 'us-east-1'

queue_url  = "http://sqs.us-east-1.amazonaws.com/#{app.get('aws_user_id')}/#{app.get('s3_bucket')}"

crueber

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

crueber

mongoose = require 'mongoose'
Model    = mongoose.model 'Room'

single_model = 'room'
plural_model = 'rooms'

# exports.before_filters = []
# exports.after_filters = []
# exports.secure = (req, is_nested, is_secure_callback) -> is_secure_callback(null, true)

crueber

directive = ->
  {
    restrict: 'A'
    scope: true
    require: 'ngModel'
    link: (scope, elem, attrs, control) ->
      control.$parsers.unshift (value) ->
        clearTimeout scope.match_password_timeout if scope.match_password_timeout

        if value != ''

crueber

# Setting up environment configuration on Heroku.
heroku config --app myapp
heroku config:add ENV_VAR=somevalue --app myapp
 
# Apply SSL Certs to Heroku
heroku certs --app myapp
heroku certs:add ssl.crt ssl.key --app myapp
 
# Generally useful commands for Heroku
heroku logs --tail --app myapp