iblash-appdev/array-chapter

Ruby Practice

Run your Ruby file by typing ruby and then the name of the file you want to run in the Terminal.

If we want to run array_count.rb, we can write the command:

ruby array_count.rb

To re-run this command, you can use the UP and DOWN arrow keys to look at the history of commands you've run in a Terminal.

Array

array_element_square.rb

Ask the user to enter at least 2 numbers. Store the user's input. The first few lines of code provided in the file does this for you.

Print the square of the second-to-last number that the user enters.

The expected output will be something like:

"Enter at least 2 numbers, separated by spaces:"
42 5 3 8 # user's input
9.0

array_count.rb

Ask the user to enter at least 2 numbers. Store the user's input. The first few lines of code provided in the file does this for you.

Use the count method to print how many numbers the user entered.

Expected output:

"Enter at least 2 numbers, separated by spaces:"
42 5 3 8 # user's input
4

array_reverse.rb

Ask the user to enter at least 2 numbers. Store the user's input. The first few lines of code provided in the file does this for you.

Use the reverse method to return the numbers in reverse order.

Expected output:

"Enter at least 2 values, separated by spaces:"
42 5 3 8 # user's input
[8, 3, 5, 42]

array_min_max_difference.rb

Use the provided array (don't ask the user for a value, in this task).

array = [12, 23, 41, 73, 19, 6]

Print the smallest number in the array, the largest number in the array, and the difference between the two.

array_sum_elements.rb

Use the provided array (don't ask the user for a value in this task).

Print the sum of the numbers in the provided array

Specs

Click here to see names of each test

array_count.rb should output '2' given the input '2 9'

array_count.rb should output '9' given the input '9 12 8 25 16 78 64 0 27'

array_count.rb should output '5' given the input '9 80 17 28 36'

array_element_square.rb should output '4.0' given the input '9 2 7'

array_element_square.rb should output '9.0' given the input '6 4 6 6 6 3 2'

array_element_square.rb should output '18.49' given the input '3.2 -1.1 -4.3 8.4'

array_min_max_difference.rb should output '6', '73', and '67' on separate lines

array_reverse.rb should output '['hello', 'zebra', '35', 'banana']' given the input 'banana 35 zebra hello'.

array_reverse.rb should output '[4, 3, 2, 1]' given the input '1 2 3 4'.

array_sum_elements.rb should output '151'