Enumerables

Question 1

all?

Answer 1

Everything “tested” by the block returns TRUTHY (all must be true in order for it to return TRUTHY)

Question 2

any?

Answer 2

Did anything tested by the block return TRUTHY? (Just needs one TRUTHY in order for it to be true)

Question 3

collect

Answer 3

A synonym for .map

Question 4

count

Answer 4

Which elements satisfy the block OR, without block, how many elements are there?

Question 5

detect

Answer 5

Which elements satisfy the block FIRST. (Does the same thing as .find)

Question 6

find_all

Answer 6

Which elements satisfy the block?

Question 7

find_index

Answer 7

What is the index of the first element to satisfy the block?

Question 8

max

Answer 8

Whats the highest value?

Question 9

max_by

Answer 9

Whats the highest value based on some property of the element?

Question 10

min

Answer 10

Whats the lowest value?

Question 11

sort

Answer 11

Put the values in order

Question 12

.map

Answer 12

creates a new array after transforming each element

Question 13

.reduce

Answer 13

distill a value after joining elements together