I had a hard time finding an explanation of all basic Big O concepts with practical use cases and code examples (ruby).
Each algorithm is broken down into 4 parts:
- Basic Definition (only what you need to know to understand the basics of this approach).
- Real life example (what you do in your daily life that mirrors this algorithm, reading a book, feeding your cat etc).
- Ruby code example (the most basic code example that I can think of).
- Other things you have done or may do in your programming day to day.
When I wanted to convert my web application for mobile and pad devices I had a hard time finding a step by step guide.There are a lot of grid systems and paid templates but what if I already made my site and now I want it to work seamlessly on all devices? This is the tutorial for you.
Responsive websites are not optimized for specific devices, like the iphone but optimized to work on all phones, all pad devices etc. This is obtained by using a fluid grid and media queries.
The three things we will be covering to get your website working on all devices is:
1. Fluid grid
2. Using em instead of px
3. Media Queries
In this tutorial I will be optimizing the homepage of Mia Math. This is an application I built that helps girls second to fourth grade learn math.
Update: Bootstrap 3 now ships with Sass, Yay!
If you’re like me you prefer sass to less but like using bootstrap to quickly make your app look beautiful on all devices and browsers.
I like to use the bootstrap-sass-rails gem so I am not stuck using less. Go ahead and add this to your gemfile in the assets group.
Next run bundle and restart the server.
You’re going to have to change the stylesheets/application.css
to stylesheets/application.css.scss. Now you’re ready to import all the components that the gem gives you.
note: I generally delete everything that is in this file.
If you refresh your browser you should see the bootstrap styles.
By: Gary Bernhardt
Google does not have an easy way to grab data from google/trends, I think they had an API awhile ago but this has long been deprecated. There are handful of posts online that show you how to make calls and get the raw data but this will get you banned very quickly.
What I ended up doing is embedding the script, that google provides, in a view and embedding ruby into the script and escaping the js. This way it will be dynamically updated depending on what value I am pulling from my database.
It looks like this:
This is great solution that will not get you banned and allow you to show data.
There is one major downside to this solution. You’re stuck with the google design and logo.
When I first started to learn git I found it terribly unintuitive. What the heck is master and why I am not the master on my own computer?! She has been lying to me all along, wench…grrr.
No one wanted to give me a simple workflow. Because it always “depended on what I was doing.” This is true but I am going to give out a workflow anyway. Here is the one I wish I had when I first started to learn git. Enjoy.
Note: Commit early and often. This will save you from doing too much damage as you’re learning version control.
Step 1 – See what branch you’re on:
You want the output to look something like this:
# On branch master
Step 2 – Create a new branch:
git co -b "name_your_branch"
Code on this branch.
Step 3 – Checkout Master Branch
git checkout master
Step 4 – Pull in changes that may have been made while you were working on your branch
git pull origin master
Step 5 – Merge your branch
git merge name_your_branch
Step 6 – Push your branch “up to” master
git push origin master
I find myself coming back to the same set of notes every time I am about to deploy. Here is my workflow for deploying my rails apps to heroku, enjoy.
Step 1: – Open up your terminal and create a new application on heroku:
Step 2: – Declare your ruby version in your gemfile
Step 3: – Add this to config/applications.rb
config.assets.initialize_on_precompile = false
Step 4 – Push your git repository to heroku
git push heroku master
Step 5 – Include postgres add on
heroku addons | grep POSTGRES
Step 6 – Add it to development
heroku addons:add heroku-postgresql:dev
Step 7 – Create Database
heroku run rake db:create
Step 8 – Migrate Database
heroku run rake db:migrate
Step 9 – Domain
heroku domains:add www.example.com
cname and dns