jamesarosen

<div class="body">
  {{#if comment }}
    <div class="comment">
       {{{ comment.value }}}
    </div>
    {{#if comment.canMakePrivate}}
      <div class="link_light make-private">
        <em data-action="make-private" data-audit-id="{{../id}}">{{comment.makePrivateActionLabel}}</em>
      </div>
    {{/if}}

jamesarosen

Elixir Notes

Defining Records with Shared Values

In JavaScript, this is a big no-no:

function Set() {
}
Set.prototype.content = [];

jamesarosen

Background

Cory Foy recently wrote an article entitled, Procedural Polymorphism: Is your code really telling you to use an if statement?. Corey Haines has been talking about this same topic for a while. Sandi Metz covers the topic in Practical Object-Oriented Design in Ruby. Ben Rady and Rod Coffin discussed using the Null-Object pattern instead of an if statement in Continuous Testing with Ruby, Rails, and JavaScript.

Printing in Conway's Game of Life

That is, very smart people whom I admire agree that, in general,

class DeadCell

jamesarosen

I have an object that acts as a "directory" or a "library" of data -- for example, a list of the time zones on the machine. Because there is only one such list, and because the list is static, this object is a good candidate for a global, immutable object. For example, in Ruby:

class TimeWithOffset

  ALL_TIME_ZONES = {
    "Midway Island": -660,
    # ...
    "Brasilia": -180,
 # ...

jamesarosen

Some questions about optional dependencies

1. A small ruby library

I'm writing a small Ruby library:

class FizzBuzzEndpoint

  def call(env)

jamesarosen

Recently, I needed to extract a number of directories from a git project each into their own projects. The original directory structure looked like

project/
  subprojects/
    Foo/
    Bar/
    Baz

jamesarosen

// Array Iteration:
myArray = [ 'foo' ];
myArray.forEach(function(x) { console.log(x); });
// prints "foo"

// Object Keys:
myObject = { foo: 'bar', baz: 'quux' };
Object.keys(myObject); // [ "foo", "baz" ]

// Object Iteration Helper (context is optional)

jamesarosen

# from our office
$ dig int.tangocard.com

; <<>> DiG 9.7.3-P3 <<>> int.tangocard.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 14686
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 13, ADDITIONAL: 7

;; QUESTION SECTION:

jamesarosen

# Our starting point:
# a Rack endpoint that performs HTTP Basic auth.
class SignInEndpoint

  def call(env)
    email, password = *credentials(env)
    user = User.authenticate(email, password)

    if user.nil? || user.deleted?
      respond_with_error 'Invalid credentials'

jamesarosen

# Usage
#   rake check_file_widths
#   rake check_file_widths[120]
#   rake check_file_widths[80, "app/**/*.rb"]
#
# Arguments:
#  * width - the max width; defaults to 80
#  * paths - the list of files to check; defaults to
#            {app,lib}/**/*.{js,rb,scss,coffee,erb}
desc "Ensure there are no overly long lines"