Rails Asset Pipeline

Main Points

a lot of the reading is just explanations for what is already there with Rails, such as the manifest files which gives instructions to sprockets as to what assets you wish to be served from your app
essentially this is how Rails takes all of your various javascripty cssy things and precompiles it all into one large js asset and one large cs asset so you can serve it up to your web app
part of the main takeaway is when things are going great we barely concern ourselves with the asset pipeline, but it often becomes necessary to look at when we’re troubleshooting a bug so it’s good to know how to navigate the pipeline
for example for the Tablesorter plugin, they would likely get unexpected behavior if they tried to require jquery.tablesorter before requiring jquery since it depends on the jquery library

jennceng / nested routes.md

Last active January 11, 2017 14:41

    class ReviewsController < ApplicationController
  def index
    # use the product id from params to find the product of interest, the key of the params hash can always be seen in the dynamic portion of the URI via rake routes
    @product = Product.find(params[:product_id])
    @reviews = @product.reviews
  end

  def new
    @product = Product.find(params[:product_id])

  

jennceng / promises and fetch.md

Last active December 7, 2016 20:28

JS Promise API

Asynchronous Programming

Javascript can only execute one thing at a time, if there is a process that is time costly like communicating with a database, we have ways to handle these processes asynchronously
callback pattern - if we want to ensure a particular sequence of execution, traditionally one way we do this is via callbacks
since functions can be passed around as arguments, callbacks involve taking another funciton as an argument so that the callback is only executed after the asynchronous task/function completes
this works fine for simple callbacks, but if there is a series of events you need to happen you encounter callback hell , aka Pyramid of Doom aka spaghetti code

jennceng / rails-nested-resources-notes.md

Created September 21, 2016 14:05

    class ReviewsController < ApplicationController
  def index
    @product = Product.find(params[:product_id])
    @reviews = @product.reviews
  end

  def new
    @product = Product.find(params[:product_id])
    @review = Review.new

  

jennceng / AR_associations_validations_mentor_group_notes.md

Last active January 4, 2017 14:33

Brief Overview

If you ever need to store something like a phone number, a zip code, essentially anything with the possibility of having a leading 0 such as an account number ALWAYS STORE THIS AS A STRING, if you store it as an integer 02143 will become 2143
In general you will see a common theme of doing things both on the database level and the model level to accomplish things such as validations and associations, this leads to extra safeguards and also
recall that SQL is how we talk to databases, if something does not get saved to the database due to some erroneous attempt (such as forgetting something that you put a NULL: false constraint on, the record will not be saved BUT the database may not tell us anything informative about what happened so we might assume things are A-ok
keep in mind that we have more specificity with Model level validations than we do with Database level, sometimes we will only be able to do specific validations on the model level such as having a ver

jennceng / wtflayout.md

Last active November 29, 2016 20:28

    # layout.erb
<html>
<head>
  <title>My Site</title>
</head>
<body>
  <%= yield %>
</body>

  

jennceng / constructor_prototype_ES6_class_pattern.md

Last active September 1, 2016 14:55

I have this property… should it be in the constructor or the prototype?

think of the constructor as the initialize function in ruby
the constructor should contain only things **unique **to the instance of the object, such as properties (aka attributes, similar to instance variables in ruby)
it is only executed upon the creation of the object, if you add methods to the constructor after the object is created, the already created object will not have access to those methods

jennceng / jQuery clinic.md

Last active August 10, 2016 00:40

based off a simple side project menu preferences the WIP git repo

The following is adapted from my mentor, Elise Fitzgerald!

#Intro to jQuery Library

jQuery is a JavaScript library. jQuery is a fast, small, and feature-rich JavaScript library. It makes things like HTML document traversal and manipulation, event handling, animation, and Ajax much simpler with an easy-to-use API that works across a multitude of browsers.

There is also another extension library called jQuery UI that provides some nice effects and methods for enhanced user experiences.

jennceng / Git setup.md

Last active January 11, 2017 20:36

Basic Git / Github setup`

Useful resources: https://help.github.com/articles/set-up-git/

Step 1. Check for git on your machine:

In terminal

$ which git

if you get something along the lines of /usr/local/bin/git you have git,

Jenn Eng jennceng

Rails Asset Pipeline

Main Points

JS Promise API

Asynchronous Programming

Brief Overview