Concepts and mechanics to prepare students for the first day of WDI

prework_checkin_mechanics.md

Pre-work Check in: Understanding Mechanics

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###Questions to ask yourself:

Variables

1. Can I define the term 'variable'?

2. How do I set a variable in Ruby?

Strings and Integers

1. What is a string?

2. What is an Integer?

3. Is 2 the same as "2"?

4. How can I create a string in Ruby?

5. How can I combine two different strings?

• Hint: Google 'string concatenation ruby'

6. How do I convert "2" into 2?

7. How do I convert 2 into "2"?

Arrays and Hashes

1. What is an Array?

2. What is a Hash?

3. What are the differences and similarities between Arrays and Hashes? How do we access their content?

4. How do I create an Array in Ruby?

5. How do I put things into an Array in Ruby?

6. Once I put something into an Array, how do I take it back out?

7. How do I put something into a Hash?

8. Once I put something into a Hash, how do I take it back out?

9. Why are Arrays and Hashes so useful?

10. What are two different ways we can represent key/value pairs in a hash?