Ruby Operators

This is funny XD

=>    hashrocket
<=>   spaceship
~>    twiddlewaka
->    stabby lambda

Time zone junk

Some random things I built to help deal with timezones in Ruby / JS

Fair random numbers in ruby

Finally! A way to get a truly, really random number in Ruby. Forget rand(), messings with seeds, etc. This gem uses the real thing - true randomness. Amazing.

Ruby String Remove Formatting

String#remove_formatting , from the StringEx library. Gets rid of unicode griefer chars, html entities, basically any BS you can think of.

This function is THE BEST THE BEST THE BEST THE BEST THE BEST THE BEST THE BEST THE BEST THE BEST THE BEST THE BEST THE BEST

Tcm Aphrodite Funkagenda

Holy crap, this is next Saturday

Who’s going?

The Crystal Method

Aphrodite

Yes, he still makes music.

Funkagenda

Tweet Storms

Fred Wilson:

What you might miss, and I missed until recently, is that Tweetstorming has some unique characteristics, which I outlined in my storm, that make it different and possibly better in some respects.

What you also might have missed: tweet storms are annoying as hell, in that they clog up the receiver’s timeline with a bunch of stuff they may or may not care about, and as a bonus are difficult to read in sequence / context.

Get a tumblr. Post an essay. Post a link to essay on Twitter. I hate that “let’s monopolize all my follower’s timelines” is gaining legitimacy by giving it a name.

Access Denied to files in an Amazon S3 Bucket | All The Fixes

Creating a Bucket Policy:

You use the AWS Policy Generator to generate a Bucket Policy. There are several examples online and Amazon has a ton of examples.

Allow viewing & downloading of S3 objects directly via a browser. If, for example, you send attachments via email and also want to link to them on S3.

AWS is so full of its own jargon at this point - set an S3 bucket policy and ACL, but make sure you have the right IAM key, and also CORS doesn’t conflict. And that’s just for S3. Don’t even look at Route 51.

Everything you know about Unix server administration has been reinvented on AWS with slightly different names and parameters, so none of the knowledge is transferrable outside of Amazon’s infrastructure. Heavy lock-in. I don’t like it.

ruby on rails - Time comparison with ActiveSupport failed - Stack Overflow

Time comparison with ActiveSupport failed

now = Time.zone.now => Wed, 19 Feb 2014 21:30:56 UTC +00:00 Time.zone.at(now.to_i) => Wed, 19 Feb 2014 21:30:56 UTC +00:00 now == Time.zone.at(now.to_i) => false

How is it possible?

Upd:

Time.zone.at(now.to_i).to_i == now.to_i => true

Selected Answer (from jvperrin)

Ruby tracks time down to the nanosecond:

now = Time.zone.now => Wed, 19 Feb 2014 21:30:56 UTC +00:00 Time.zone.at(now.to_f) => Wed, 19 Feb 2014 21:30:56 UTC +00:00 now == Time.zone.at(now.to_f) => false

But if you compare the nanoseconds, you will see they are not the same, even when creating the time object using the float value, because the float value used to create the new time object is not as accurate as the nanosecond value of the time:

now.nsec => 956134961 Time.zone.at(now.to_f).nsec => 956134796

Got hit with this while testing.

Strong Parameters are shit

From the docs:

params = ActionController::Parameters.new({
  person: {
    name: 'Francesco',
    age:  22,
    role: 'admin'
  }
})

permitted = params.require(:person).permit(:name, :age)
permitted            # => {"name"=>"Francesco", "age"=>22}
permitted.class      # => ActionController::Parameters
permitted.permitted? # => true

Chainable method calls are wrong here. It’s okay for doing the most basic possible forms, using all the Rails defaults, but for anything else it’s crap. See bullshit like this - and that’s for sanctioned nested_attributes type calls.

Let’s take a simple example:

params = ActionController::Parameters.new(first: true, second: {first_hash: 1, second_hash: 2, third_hash: 3})

How do we get the values of both :first and :second ? If you know in advance what all the possible keys for :second are, you can do this:

params.permit(:first, :second => [:first_hash, :second_hash, :third_hash])

If you don’t know exactly which keys are there, or want to use logic based on what keys are present… well, no. Definitely not.

If you’re doing doing something like tags, lists, or other things that don’t nicely map to one parameter => single-level hash, you’re in for a rough ride. If you only want to allow certain attributes to be edited by certain users, you need a hacky workaround like building up a giant array or hash before calling .permit . If you want to call params.permit in a before_filter, get lost. If you want to save Javascript logs or something else with a totally arbitrary structure, go die in a fire.

A better model would be to pass a schema to StrongParameters. Imagine if we could call something like this:

def user_params
  params.schema(
    user: {
      email: String,
      tags: [Array, String],
      happiness_level: Numeric,
      preferences: {
        remember_me: Boolean,
        email_me: Boolean
      },
      js_analytics: JSON,
      js_events: Array,
      js_logs: Hash
    }
  )
end

This would be way nicer - you could specify conversions so you don’t get strings where you expect numbers or booleans. You could specify what sub-attributes to allow on a hash or array, or just use the raw class if you want to sort it out yourself. And, this theoretical schema method would just return a new Parameters instance with the schema applied - if you wanted to get different attributes earlier or later in the request, just call params.schema again.

I’ve been developing with Rails for ten years now. If I find this crap difficult, I can’t imagine what people in coding boot camps must think of it.

Update: the rails_param looks like a good alternative.

Your marketing emails are not cute

Getting real sick of your shit, startups. These marketing emails are not cute. They are (in order) condescending, creepy, and insulting.

Boatbound

Boatbound
No, I didn’t forget, but thanks for making me think for a second that I had.

Bitbucket

Bitbucket
Is my repo gonna commit suicide unless I stay with it? Does it need me to love it forever?

Homejoy

Homejoy
Forwaded from a friend, but I got this one too. No, Homejoy. Actually, I can take care of myself without you. You’re convienent. When you’re not insulting me.