DEV Community: brylenelavelle

Ruby: Times Iteration

brylenelavelle — Wed, 08 Mar 2023 21:43:10 +0000

Using a number to iterate that amount of times:

5.times do
  puts "Hello!"
end

The times method can also take a single argument. The times index starts at 0:

5.times do |item|
  puts "Hello! #{item}"
end

Ruby: Building a Grocery List Program Using Arrays and Hashes

brylenelavelle — Wed, 08 Mar 2023 16:25:35 +0000

def create_list
  # Prompts input from user
  print "What is the list name? "
  # Returns as value input to hash with key "name"
  name = gets.chomp
  # Creates hash assigned to variable hash
  # Variable "items" creates an array
  hash = { "name" => name, "items" => Array.new }
  return hash
end

def add_list_item
  # Prompts input from user
  print "What is the item called? "
  # Returns as value input to hash with key "item_name"
  item_name = gets.chomp

  print "How much? "
  # Returns as value input to hash with key "quantity"
  quantity = gets.chomp.to_i

  hash = { "name" => item_name, "quantity" => quantity }
  return hash
end

def print_separator(character= "-")
  puts character * 80
end

# To fancify the format of the printed list
def print_list(list)
  puts "List: #{list['name']}"
  print_separator()

  list["items"].each do |item|
    puts "\tItem: " + item['name'] + "\t\t\t" +
      "Quantity: " + item['quantity'].to_s
  end

  print_separator()
end

# Prints create_list
list = create_list()

puts "Great! Add some items to your list."
# Combines add_list_item hash to the 
# "items" array from create_list
# The three method calls also allows user to
# add items 3 times
list['items'].push(add_list_item())
list['items'].push(add_list_item())
list['items'].push(add_list_item())

puts "Here's your list:\n"
print_list(list)

Output

Ruby Arrays: Access, Insert, Count, and Include

brylenelavelle — Tue, 07 Mar 2023 19:57:27 +0000

array_list = ["milk", "eggs", "bread", "ice cream", "pie", "potatoes"]

Accessing "milk" and assigning it to variable named "item"
item = array[0]

Printing first item in array:
puts.array.first

Printing out last item in array:
puts array[-1]
puts array.last

Return the number of items in an array:
array.length
array.count

Return the number of items in the array based on the matches found:
array.count("eggs") # => 1

To find out if a specific item is on the array list:
array.include?("eggs") # => true

Ruby: Creating an Array and Addition Functions

brylenelavelle — Tue, 07 Mar 2023 18:30:36 +0000

Create an array:
array_name = []
array_name = Array.new

Adding items to the array:
array = ["milk", "eggs", "bread"]
array = %w(milk eggs bread)

Adding "carrots" to the end of the array:
array << "carrots"

Adding the string "potatoes" to the end of the array:
array.push("potatoes")

Adding the string "celery" to the beginning of the array:
array.unshift("celery")

Adding "ice cream" and "pie" to the end of the array"
array += ["ice cream", "pie"]

Adding the number 1 to the end of the array:
array << 1

How to clear terminal in macOs

brylenelavelle — Mon, 06 Mar 2023 19:05:19 +0000

Type in:

$ clear

Or press:
control+command+L

How To Commit and Push Changes on GitHub

brylenelavelle — Mon, 06 Mar 2023 18:45:12 +0000

In the terminal, type in:

$ git add --all
$ git commit -m "new changes"
$ git push