questions.txt

Please Read: 
 - Chapter 6 Standard Types
 - Review Blocks
 - Chapter 7 Regular Expressions
 - Chapter 22 The Ruby Language: basic types (symbols), variables and constants

1. What is a symbol?

A symbol is an immutable representation of a string.

2. What is the difference between a symbol and a string?

A string is mutable, a symbol is not.

3. What is a block and how do I call a block?

A block is code that is called with curly braces or do ... end.

4. How do I pass a block to a method? What is the method signature?

A block can be passed to a method with yield or it can be instantiated with an ampersand.

5. Where would you use regular expressions?

A regular express is useful for matching text against the contents of a string, such as when verifying the contents of a string or substituting pieces of the string.