- screenshots of scores will be posted in comments
- screenshots of completed sections will be posted in comments
- Did you run into any issues?
- Nope
- How do you open Visual Studio from your Terminal?
- type "code"
- What is the file extension for a Ruby file?
- .rb
- What is the VS shortcut for hiding/ showing your file tree view?
- Command+B
- What is the VS shortcut for quickly finding a file (fuzzy finder)?
- Shift+Command+F
Day One Questions:
- What does pwd stand for, and how is this command helpful?
- Present Working Directory; It tells you the directory that you are currently in
- What does hostname tell you, and what shows up in YOUR terminal when you type hostname?
- hostname displays the systems DNS name. My terminals hostname is dradden-turing-prework-4122025
IRB
- How do you start and stop irb?
- irb and exit
- What might you use irb for?
- Experiment and find out how certain language features work
Variables
- How do you create a variable?
- "variable_name" = value
- What did you learn about the rules for naming variables?
- It can not start with a number and can not countain symbols other than underscore
- How do you change the value of a variable?
- "variable_name" = different value
Datatypes
- How can you find out the class of a variable?
- type .class after it
- What are two string methods?
- "hi" and "banana"
- How can you change an integer to a string?
- 1.to_s
Strings
- Why might you use double quotes instead of single quotes in Ruby?
- If the string contains interpolation
- What is this used for in Ruby: #{}?
- Interpolation. Code within a string
- How would you remove all the vowels from a string?
- string.delete('aeiou')
Input & Output
- What do 'print' and 'puts' do in Ruby?
- they print infromation to a user. print doesnt make a new line afterwords, but puts does.
- What does 'gets' do in Ruby?
- Takes user input
- Add a screenshot in the comments of the program you created that uses 'puts' and 'gets', and give it the title, "I/O".
Numbers & Arithmetic
- What is the difference between integers and floats?
- An integer is a whole number. Float is a decimal number.
- Complete the challenge, and post a screenshot of your program in the comments with the title, "Numbers".
Booleans
-
What do each of the following symbols mean?
- ==
- equal to
-
=
- Greater Than
- <=
- Less than
- !=
- Not equal to
- &&
- and
- ||
- or
- ==
-
What are two Ruby methods that return booleans?
- end_with? and nil?
Conditionals
- What is flow control?
- The concept of having our program make decisions for us.
- What will the following code return?
- "Not many apples..."
apple_count = 4
if apple_count > 5
puts "Lots of apples!"
else
puts 'Not many apples...'
end
- What is an infinite loop, and how can you get out of one?
- WHen there is no programmed way to exit it a loop so it just repeats forever. You can get out of it with cntrl+c
- Take a screenshot of your program and terminal showing two different outputs, and post it in the comments with the title, "Conditionals".
nil
- What is nil?
- It is equivalent to none or nothing
- Take a screenshot of your terminal after working through Step 4, and post it in the comments with the title, "nil".
Symbols
- How can symbols be beneficial in Ruby?
- They are memory efficient
- Does naming symbols use the same rules for naming variables?
- no
- Take a screenshot of your terminal after working through Step 4, and post it in the comments with the title, "Symbols".
Arrays
- What method can you call to find out how many elements are in an array?
- .length
- What is the index of pizza in this array: ["pizza", "ice cream", "cauliflower"]?
- 0
- What do 'push' and 'pop' do?
- push adds an element to the end of an array and pop removed the last element
Hashes
- Describe some differences between arrays and hashes.
- With arrays, you access elements by their index, a number. With a hash, you access elements by their key.
- What is a case when you might prefer an array? What is a case when you might prefer a hash?
- You might prefer an array with you just need a simple list. Hashes are used when you are trying to give meaning or values to specific strings.
- Take a screenshot of your terminal after working through Step 2, and post it in the comments with the title, "Hashes".
- Were you able to get through the work? Did you rush to finish, or take your time?
- What are you most looking forward to learning more about?
- What topics would you most like to see reinforced by instructors?
- What is most confusing to you about what you've learned?
- What questions do you have for your student mentor or for your instructors?
(Note: You will most likely only get to the following sections if you have more than a week for your pre-work. If you are doing the one week pre-work schedule, you may delete this section of the Gist.)
- Loops: Take a screenshot of your "Challenge" program, and post it as a comment in your Gist.
- What challenges did you try for "Summary: Basics"? Post a screenshot of one of your programs.
- Functions: How do you call a function and store the result in a variable?
- Describe the purpose of the following in Ruby classes: initialize method, new method, instance variables.
- How to Write a Program: Screenhero with your student mentor and share your program. Write a bit about what you found most challenging, and most enjoyable, in creating your program.
- screenshots will be posted in comments
- What are your three biggest takeaways from working through this book?
- screenshots will be posted in comments
- What are your two biggest takeaways from working through this tutorial?
- What is one question you have about Git & GitHub?
- Describe your thinking on effective workflow. What shortcuts do you think you'll find most useful? What would you like to learn or practice that will most help you improve your speed and workflow?
As you complete each section, respond to the related questions below (mostly taken directly from the tutorial exercises):
- 1.3: By reading the "man" page for echo, determine the command needed to print out “hello” without the trailing newline. How did you do it?
- 1.4: What do Ctrl-A, Ctrl-E, and Ctrl-U do?
- 1.5: What are the shortcuts for clearing your screen, and exiting your terminal?
- 2.1: What is the "cat" command used for? What is the "diff" command used for?
- 2.2: What command would you use to list all txt files? What command would you use to show all hidden files?
- 3.1: How can you download a file from the internet, using the command line?
- 3.3: Describe two commands you can use in conjunction with "less".
- 3.4: What are two things you can do with "grep"?
Numbers
