Methods, Blocks & Sorting

Question 1

method

Answer 1

a reusable section of code written to execute a certain task.
defined using “def”

i.e.
def greeting
puts “hello”
end

greeting
-> hello

Question 2

three parts to a method

Answer 2

1. def & name of the method
2. body: describes the procedure of the methos
3. end

Question 3

parameter

Answer 3

placeholder for the method argument

Question 4

argument

Answer 4

the argument you use in running a method

Question 5

splat argument

Answer 5

a method that can receive one or more arguments.

use * to signal to an parameter that it can receive several arguments

i.e.

def what_up(greeting, *friends)

Question 6

return

Answer 6

returns back a value from a method

Question 7

blocks

Answer 7

nameless methods.
define by either do and end
or { }

Question 8

difference between methods and blocks

Answer 8

methods can be called several times whereas blocks can only be called once

Question 9

.sort!

Answer 9

Sorts values in an array either numerically or alphabetically

my_array = [3, 4, 8, 7, 1, 6, 5, 9, 2]

puts my_array.sort!

prints out
[1, 2, 3, 4, 5, 6, 7, 8, 9]

Question 10

<=>

Answer 10

combines comparison operator.
compares to objects
It returns 0 if the first operand (item to be compared) equals the second, 1 if the first operand is greater than the second, and -1 if the first operand is less than the second.

i.e.

book_1 = “A Wrinkle in Time”

book_2 = “A Brief History of Time”

book_1 <=> book_2

returns 1

Question 11

.reverse!

Answer 11

reverse sorts and array from last to first