Setup:
$ mongo
> use pubsub
> db.createCollection('messages', { capped: true, size: 100000 })
> db.messages.insert({})
/* | |
* Copyright (c) 2010 Tobias Schneider | |
* This script is freely distributable under the terms of the MIT license. | |
*/ | |
(function(){ | |
var UPC_SET = { | |
"3211": '0', | |
"2221": '1', | |
"2122": '2', |
// (c) copyright unscriptable.com / John Hann | |
// License MIT | |
// For more robust promises, see https://github.com/briancavalier/when.js. | |
function Promise () { | |
this._thens = []; | |
} | |
Promise.prototype = { |
function transpose(a) | |
{ | |
return a[0].map(function (_, c) { return a.map(function (r) { return r[c]; }); }); | |
// or in more modern dialect | |
// return a[0].map((_, c) => a.map(r => r[c])); | |
} |
var s = 'this-is-a-very-very-very-long-file-name.jpg'; | |
console.log(truncate(s, 100)); //this-is-a-very-very-very-long-file-name.jpg | |
console.log(truncate(s, 10)); //this-is-a-[...].jpg | |
console.log(truncate(s, 4)); //this[...].jpg |
var distances = { | |
euclidean: function(v1, v2) { | |
var total = 0; | |
for (var i = 0; i < v1.length; i++) { | |
total += Math.pow(v2[i] - v1[i], 2); | |
} | |
return Math.sqrt(total); | |
}, | |
manhattan: function(v1, v2) { | |
var total = 0; |
var mongoose = require('mongoose'); | |
var db = mongoose.createConnection('127.0.0.1', 'test'); | |
// Make schema | |
var schema = mongoose.Schema({ name: String }); | |
// Create subscribers collection | |
var subscribers = []; | |
// Hook `save` post method |
##Google Interview Questions: Product Marketing Manager
This article has been given a more permanent home on my blog. Also, since it was first written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.
Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:
getTweetsFor("domenic", function (err, results) {
// the rest of your code goes here.
/*Transparent pattern placed over an image, like we see on the bootstrap homepage: http://twitter.github.com/bootstrap/index.html*/ | |
div { | |
width: 200px; | |
height: 200px; | |
display: block; | |
position: relative; | |
background: url(images/background-image.png); | |
} |