meagar

##JavaScript isn't threaded

• Synchronous code locks up the browser
• Asynchronous code frees up the browser but leads to...

##Async callback hell

"Return" values are no longer available to our synchronous code

meagar

This is a really fast way to restore a large Postgres database by omiting the indexes and restoring them later (if necessary).

1. Dump database.

    pg_dump -Fc --no-owner my_db -f ~/my_db.dump
   

2. Create the summary files. One for the indexes and another for everything else.

pg_restore -l ~/my_db.dump | grep -v 'INDEX public' > ~/my_db.list

meagar

This is a really fast way to restore a large Postgres database by omiting the indexes and restoring them later (if necessary).

1. Dump database.

   pg_dump -Fc --no-owner my_db -f ~/my_db.dump

2. Create the summary files. One for the indexes and another for everything else.

pg_restore -l ~/my_db.dump | grep -v 'INDEX public' > ~/my_db.list

meagar

At 9:45am, Wednesday October 23rd, I was turning right from Skymark Ave to Explorer Drive.

There was a bus, 35AW, parked on Skymark with its hazard lights on, approximately 3 meters back from the intersection.

I passed the bus on the left, intending to turn right on Explorer, but before I could complete the pass, the bus started moving.

I was ahead of the bus, forward of its front left corner, and couldn’t get back into the right lane; further I believed the driver hadn’t seen me, as I could clearly see him and he showed no signs of acknowledging my presence, and I believed that I was in danger of being struck unless I made my presence known. I called “Hello!” to the window, which I could see was partially open.

The bus slammed on its brakes, and the driver blasted the horn at me while giving me the middle finger. I returned the gesture over my shoulder.

meagar

# There's an incredibly common pattern when using promises:
#
#     myFunction: ->
#       dfd = $.Deferrred()
#
#       $.ajax "wherever"
#       .done() ->
#         dfd.resolve("yep")
#       .fail() ->
#         dfd.reject("nope")

meagar

Improving Backbone's get to accept multiple arguments

CoffeeScript makes this work well:

[name, age] = user.get('name', 'age')

It would be trivially easy to allow Pam.Model's get to override Backbone's get to support this

meagar

A short list of CoffeeScript gotcha's I've encountered writing CoffeeScript professionally.

These are not problems with CoffeeScript, rather they are strange one-off situations where, especially coming from Ruby, differences in CoffeeScript's syntax have led to unexpected JavaScript.

meagar

Managing JavaScript Complexity

Jarrod Overson's excellent QConSF 2013 talk

Original slides: http://www.slideshare.net/JarrodOverson/complexity-28214103

Sort of Managing JavaScript Complexity

Matthew "Maverick" Eagar

meagar

# Use:
#
# # Pass an emuerable to #new
#
# users = User.active
# RakeProgrssBar.new(users) do |user|
#   user.do_something_amazing
# end
#
#

meagar

MyModule.configure do |config| 
#stuff inside 
end