Day 38, part 2: Back to ride the Rails

I will be studying the Michael Hartl Ruby on Rails tutorial. First, however, I want to do a quick refresher to catch up to where I left off. I’ll use Treehouse for that. I am glad there is a speed up function there. Here we go! BTW, I am going to speed through these and just post the badges I earn. I want to get going and fast.

Beginning HTML and CSS badge

HTML First badge

Creating HTML Content badge

OK, I will be continuing tomorrow. For those wondering why I am going back through this again, well, that is twofold:

1. Refreshers are good. I want to know this stuff really well. While HTML and CSS are markup languages, it is important to understand them.
2. I’m a completionist. Here is what the path ahead on Treehouse looks like:

I completed the Ruby Basics course already. I am a quarter of the way through the “How to Make a Website” stage. I want to be competent and refreshing my knowledge is a good way to ensure I know my stuff.

Day 38, Part 1: First App Finished

I just finished my Book Tracker app. I decided to only add a print function as I would want to put out the whole list as I go. I may go back eventually to add search, but for what it is for I believe a list function is best. I am using it to track as I go.

I created a video to detail the app and show how it works:

and here is a look at the code. You can also see the code at my GitHub profile.

First, the main file:

and the the file where I create Book.class:

and then the YAML file… where the data is stored.

OK, I am moving on to Ruby on Rails tonight. I will return shortly!

Day 37: Working on my App and Finishing Exercise 39 at Learn Ruby the Hard Way

I had a day off from work so spent a good portion of the day enjoying being off work. I am back now to finish the long lesson last night from Learn Ruby the Hard Way: Exercise 39: Hashes, Oh Lovely Hashes.

So, the second portion of the Exercise had a module, dict.rb, and then another file full of hashes to run using the module. Here is the code:

and the test file:

demosthenes131@rails-tutorial:~/workspace/LRTHW (master) $ ruby ex39_test.rb
———-
NY State has: New York
OR State has: Portland
———-
Michigan’s abbreviation is: MI
Florida’s abbreviation is: #Dict.get(states, ‘Florida’)}
———-
Michigan has: Detroit
Florida has: Jacksonville
———-
Michigan
MI
New York
NY
Florida
FL
Oregon
OR
California
CA
———-
CA
San Francisco
OR
Portland
NY
New York
MI
Detroit
FL
Jacksonville
———-
Sorry, no Texas.
The city for the state ‘TX’ is: Does not exist

And now back to my app!

I added a way to preserve added data today via YAML

Here is the BookTracker main file:

the Book class file:

and what happens when I add information:

First session:

demosthenes131@book_tracker:~/workspace (master) $ ruby book_tracker.rb
Select an option from the below choices
a: Add a Book
p: View the Books
s: Search the Books
e: Exit
a
Book title: Storm Front
Author: Jim Butcher
Genre: Urban Fantasy
Have you read it, listened to it, or is it a wish list item? Listened
Write a short, one sentence, review! Amazing
Select an option from the below choices
a: Add a Book
p: View the Books
s: Search the Books
e: Exit
e
[#]

At this point I was having a lot of trouble originally. Everytime I restarted the app and entered a new book the previous book was deleted. I fixed this by adding the open() to the run method which would then populate the array. Next session after this (also after I removed a few items that I will re-add later):

demosthenes131@book_tracker:~/workspace (master) $ ruby book_tracker.rb
Select an option from the below choices
a: Add a Book
e: Exit
a
Book title: Hounded
Author: Kevin Hearne
Genre: Urban Fantasy
Have you read it, listened to it, or is it a wish list item? Read it
Write a short, one sentence, review! Fun
Select an option from the below choices
a: Add a Book
e: Exit
e
[#, #]

And here is the YAML output file:

My plan tomorrow is to work on the search and print functions!

Day 36: Splitting Time Between Writing a New App and Learning Ruby the Hard Way

So, I want to get back to finishing Learn Ruby the Hard Way while also applying my new found knowledge to the app I am creating.

I will start with Exercise 39:

and the results:

demosthenes131@rails-tutorial:~/workspace/LRTHW (master) $ ruby ex39.rb
———-
NY state has: New York
OR state has Portland
———-
Michigan’s abbreviation is: MI.
Florida’s abbreviation is: FL
———-
Michigan has: Detroit
Florida has: Jacksonville
———-
Oregon is abbreviated OR
Florida is abbreviated FL
California is abbreviated CA
New York is abbreviated NY
Michigan is abbreviated MI
———-
Oregon has the city OR
Florida has the city FL
California has the city CA
New York has the city NY
Michigan has the city MI
———-
Oregon is abbreviated OR and has city Portland
Florida is abbreviated FL and has city Jacksonville
California is abbreviated CA and has city San Francisco
New York is abbreviated NY and has city New York
Michigan is abbreviated MI and has city Detroit
———-
Sorry, no Texas.
The city for the state ‘TX’ is: Does Not Exist

OK, I have more to do this lesson but spent the rest of my night reading through my code and trying to figure out how to get my user input to go into a hash then have that hash go into an array. I will continue tomorrow.

Day 35: Getting Closer to a Finished First App

So, i made more progress today, especially thanks to Jesus Castello of BlackBytes.info who helped me understand the difference between instance vs. local variables. So, here is how the Book Tracker is looking tonight. Also, feel free to take a look at it on GitHub.

The book class:

and the main book_tracker file:

And here are the results for this:

Select an option from the below choices
a: Add a Book
p: View the Books
s: Search the Books
e: Exit
a
Book title: Ender’s Game
Author: Orson Scott Card
Genre: SciFi
Have you read it, listened to it, or is it a wish list item? read it
Write a short, one sentence, review! Awesome
Select an option from the below choices
a: Add a Book
p: View the Books
s: Search the Books
e: Exit
a
Book title: Storm Front
Author: Jim Butcher
Genre: Urban Fantasy
Have you read it, listened to it, or is it a wish list item? listened
Write a short, one sentence, review! Amazing
Select an option from the below choices
a: Add a Book
p: View the Books
s: Search the Books
e: Exit
p
Book List
#
#
Select an option from the below choices
a: Add a Book
p: View the Books
s: Search the Books
e: Exit
e
[#, #]

I will continue hacking away tomorrow!

Day 34 Update: Working more on the App

OK, so I did some more work tonight. I am just going to post the files as they are a work in progress. Still not working 100%.

This is my new class for Book.

and the book_tracker main file. Its a mess as I am still trying to figure out how to store the data and scuh. The array is still not working, though it was earlier. I will keep working on it.

I will keep on working on it all.

Day 34: Studying Hashes

OK, my Book Tracker app is coming along but I am having difficulty getting the hash to output correctly.

I tried one last go at it this morning:

and it resulted in this:

demosthenes131@book_tracker:~/workspace (master) $ ruby test.rb
Do you want to add a book? (yes or no)
yes
Add a book!
Ender
How about a short, one sentence review? (yes or no)
yes
Add your review!
Awesome
Do you want to add a book? (yes or no)
yes
Add a book!
Dresden
How about a short, one sentence review? (yes or no)
yes
Add your review!
Amazing
Do you want to add a book? (yes or no)
no
[“Ender”, “Dresden”]
{“book”=>[[“Ender”, “Dresden”]], “review”=>[[“Awesome”, “Amazing”]]}
book — [[“Ender”, “Dresden”]]
review — [[“Awesome”, “Amazing”]]

Close, but not what I want. Time to look for a solution.

I worked out a simple one to get the look and feel down. Take a look:

demosthenes131@book_tracker:~/workspace (master) $ ruby test.rb
Do you want to add a book? (yes or no)
yes
Add a book!
Ender
How about a short, one sentence review? (yes or no)
yes
Add your review!
Awesome
Do you want to add a book? (yes or no)
yes
Add a book!
Dresden
How about a short, one sentence review? (yes or no)
yes
Add your review!
Amazing
Do you want to add a book? (yes or no)
no
Ender — Awesome
Dresden — Amazing

Day 33: Making the Decision to Write My First App

Well, I have made a decision. I will be writing my first app over the coming days (possibly weeks).

I have decided to make an app in Ruby to track books I have read or listened to. I would like to eventually be able to assign a short, one sentence review to each. I would also like to figure out a way to mark the books as read, listened to, or wish list. Let’s get started.

Preface: I will be borrowing code from previous exercises. I will make a lot of mistakes. I will not apologize for either. I will say thanks to the previous exercises, however.

OK, here goes. The first bit of my code adds a menu that barely works and allows me to add a book.

OK, this is what happens:

demosthenes131@book_tracker:~/workspace $ ruby book_tracker.rb
Select an option from the below choices
a: Add a Book
v: View the Books
s: Search the Books
e: Exit
a
Add a book!
Ender’s Game
Select an option from the below choices
a: Add a Book
v: View the Books
s: Search the Books
e: Exit
a
Add a book!
Old Yeller
Select an option from the below choices
a: Add a Book
v: View the Books
s: Search the Books
e: Exit

Weird. It won’t keep the previously entered book. I need to create an array to collect these, I’m guessing…

And I have banged my head for an hour on this. I scrapped the whole thing and went simple:

and the results:

demosthenes131@book_tracker:~/workspace $ ruby book_tracker.rb
Add a book!
Ender
[“Ender”]
Add a book!
Shadow
[“Ender”, “Shadow”]
Add a book!
Hitchhiker
[“Ender”, “Shadow”, “Hitchhiker”]
Add a book!
Dresden
[“Ender”, “Shadow”, “Hitchhiker”, “Dresden”]
Add a book!

OK, this works. Let’s go a little more fancy. I want it to loop until I end it, and allow me to enter as many books as I decide. When I end it, I want it to print the list of books and then break. I worked it out a bit:

book_list = []

and it works! I was as surprised as you are:

demosthenes131@book_tracker:~/workspace $ ruby test.rb
Do you want to add a book? (yes or no)
yes
Add a book!
Ender’s Game
Do you want to add a book? (yes or no)
yes
Add a book!
Dresden Files
Do you want to add a book? (yes or no)
yes
Add a book!
Hitchhiker’s Guide to the Galaxy
Do you want to add a book? (yes or no)
no
[“Ender’s Game”, “Dresden Files”, “Hitchhiker’s Guide to the Galaxy”]

I also want to be able to add a one sentence review. I think a hash would work for this. Here is my attempt:

And the results:

demosthenes131@book_tracker:~/workspace $ ruby test.rb
Do you want to add a book? (yes or no)
yes
Add a book!
Ender
How about a short, one sentence review? (yes or no)
yes
Add your review!
Great book!
Do you want to add a book? (yes or no)
yes
Add a book!
Dresden
How about a short, one sentence review? (yes or no)
yes
Add your review!
Lots of fun
Do you want to add a book? (yes or no)
no
[“Ender”, “Dresden”]
{“book”=>[[“Ender”, “Dresden”]], “review”=>[[“Great book!”, “Lots of fun”]]}

I tried to work out the way to display this right. No luck as of yet. My last update:

and the result:

demosthenes131@book_tracker:~/workspace $ ruby test.rb
Do you want to add a book? (yes or no)
yes
Add a book!
Ender
How about a short, one sentence review? (yes or no)
yes
Add your review!
Awesome book
Do you want to add a book? (yes or no)
yes
Add a book!
Dresden
How about a short, one sentence review? (yes or no)
yes
Add your review!
urban fantasy fun!
Do you want to add a book? (yes or no)
no
[“Ender”, “Dresden”]
{“book”=>[[“Ender”, “Dresden”]], “review”=>[[“Awesome book”, “urban fantasy fun!”]]}
book – [[“Ender”, “Dresden”]]
review – [[“Awesome book”, “urban fantasy fun!”]]

Day 33: Back to Learn Ruby the Hard Way (Part One)

I am back and learning Ruby the Hard Way. Let’s get to it. I am skipping ahead a bit as Exercise 36 was to work on a RPG game and Exercise 37 was memorizing symbols. I am working on a different project soon to add to my portfolio. I am also adding the symbols to AnkiDroid for study. So, I am doing Exercise 38: Doing Things to Arrays.

Here is the code we are starting with:

and the results:

demosthenes131@rails-tutorial:~/workspace/LRTHW (master) $ ruby ex38.rb
Wait there are not 10 things in that list. Let’s fix that.
Adding Boy
There are 7 items now.
Adding Girl
There are 8 items now.
Adding Banana
There are 9 items now.
Adding Corn
There are 10 items now.
There we go: [“Apples”, “Oranges”, “Crows”, “Telephone”, “Light”, “Sugar”, “Boy”, “Girl”, “Banana”, “Corn”].
Let’s do some things with stuff.
Oranges
Corn
Corn
Apples Oranges Crows Telephone Light Sugar Boy Girl Banana
Telephone#Light#Sugar

So, in this exercise we are seeing how to add items into the array, as well as count the items inside it.

Study Drill time:

1. Translate these two ways to view the function calls in English. For example, more_stuff.pop() reads as, “Call pop on more_stuff.” Meanwhile, pop(more_stuff) means, “Call pop with argument more_stuff.” Understand how they are really the same thing. and 2. Translate these two ways to view the function calls in English. For example, more_stuff.pop() reads as, “Call pop on more_stuff.” Meanwhile, pop(more_stuff) means, “Call pop with argument more_stuff.” Understand how they are really the same thing.

I am going to combine these. Let’s take a look:

Take the ten things and split them up with a space.

While the list of stuff is not 10, take items and add them until there are 10.

Let’s call things from the array in various ways:

The item at cardinal number 1 is Oranges.
The last item is Corn
Pop the last item of the array off, which is Corn.
Join all the items together using a space and list them here.
List the items at cardinal numbers 3 4 5 and join them with a #.

3. Go read about “object-oriented programming” online. Confused? I was too. Do not worry. You will learn enough to be dangerous, and you can slowly learn more later.

I decided to find a simple explanation for now. Take a look here.

4. Read up on what a “class” is in Ruby. Do not read about how other languages use the word “class.” That will only mess you up.

This was taught at length over at Treehouse!

5. Do not worry If you do not have any idea what I’m talking about. Programmers like to feel smart so they invented object-oriented programming, named it OOP, and then used it way too much. If you think that’s hard, you should try to use “functional programming.”

I enjoy this.

6. Find 10 examples of things in the real world that would fit in an array. Try writing some scripts to work with them.

Hmm. I mean, a lot of things can be used in an array. I will do one example as I worked with these at length at Treehouse.

and the result:

demosthenes131@rails-tutorial:~/workspace/LRTHW (master) $ ruby studydrill38.rb
The best breed of dog is the Jack Russell Terrier.
Jack Russell Terrier * Poodle * German Shepherd * Collie * Pug

OK, be back a little later.

Day 32: Finishing Ruby Track in Treehouse

I have a lofty goal today. I want to finish the Ruby track at Treehouse. I did work yesterday (which technically should be day 32) and completed the True and False video and quiz as well as the Nil video and challenge. I did these over my phone. That means I am starting on the Precedence video today. I am going to work hard and get through this. Let’s go:

and finish the quiz!

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