Sara hackerzhut

History of Frontend Tooling

Frontend Development

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A few show tricks to find slow queries in mongodb

Enable profiling

First, you have to enable profiling

> db.setProfilingLevel(1)

Now let it run for a while. It collects the slow queries ( > 100ms) into a capped collections, so queries go in and if it's full, old queries go out, so don't be surprised that it's a moving target...

Rails Models

Generating models

$ rails g model User

Associations

belongs_to

has_one

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

For more about AWS and AWS Certifications and updates to this Gist you should follow me @leonardofed

	[2013-02-28 13:29:02,102][INFO ][cluster.metadata ] [Kl'rt] [_river] creating index, cause [auto(index api)], shards [1]/[1], mappings []
	[2013-02-28 13:29:02,249][INFO ][cluster.metadata ] [Kl'rt] [_river] update_mapping [mongodb] (dynamic)
	[2013-02-28 13:29:02,290][INFO ][river.mongodb ] [Kl'rt] [mongodb][mongodb] river name [org.elasticsearch.river.RiverName@35f80e40] monitoring namespace [profile.person]
	[2013-02-28 13:29:02,290][INFO ][river.mongodb ] [Kl'rt] [mongodb][mongodb] starting mongodb stream: host [localhost], port [27017], gridfs [false], filter [null], db [profile], indexing to [mongoindex]/[person]
	[2013-02-28 13:29:02,325][INFO ][cluster.metadata ] [Kl'rt] [mongoindex] creating index, cause [api], shards [5]/[1], mappings []
	[2013-02-28 13:29:02,480][INFO ][river.mongodb ] [Kl'rt] [mongodb][mongodb] Start indexer thread.
	[2013-02-28 13:29:02,482][INFO ][river.mongodb ] [Kl'rt] [mongodb][mongodb] Start tailer thread.
	[2013-0

	gm(request(url))
	.resize("80^", "80^")
	.stream(function (err, stdout, stderr) {
	var chunks = [];
	stdout.on('data', function (chunk) {
	chunks.push(chunk);
	});
	stdout.on('end', function () {
	var image = Buffer.concat(chunks);
	var options = {

	{
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	{
	"annotation": "This is the shit",
	"coreMaps": [
	{
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	// Use Gists to store code you would like to remember later on
	console.log(window); // log the "window" object to the console