each_map_select_find_drills.rb

# .each drills

# 1. The following array will be used in the .each challenges

# beatles = ['george harrison', 'ringo starr', 'john lennon', 'paul mccartney']

# a. Using .each print each of the beatles to the screen

# b. Using .each print each of the beatles to the screen except for john lennon

# c. Using .each print out the message "<the name of the beatle> was a founding member of the band the beatles"

# d. Define a hash called beatles, in it have a members key with the value of the array defined above, also have an instruments key with the value of an array which is ['guitar', 'drums', 'bass', 'keyboard']

# e. Using .each_with_index print out the message "<the name of the beatle> was a founding member of the band the beatles, and they played <an instrument>"

# f. Using .each print out each of the beatles to the screen... but only their first names

# g. Define an array named rock_stars, using .each push each of the beatles into the array rock_stars and then print rock_stars

# h. Using .each_with_index loop through the beatles array until you get to john lennon then print "john lennon has an index of <index>"

# i. Using .each, if the beatle has a first name longer than 4 letters push their name into an array called beatles_with_long_names, print this array

# j. Using .each and .upcase, loop through the array and .upcase all the beatles and push their new upcased name into a new array called upcased_beatles, print upcased_beatles

# .map drills

# 2. The following array will be used in the first set of .map challenges

# numbers = [1, 2, 3, 4]

# a. Using .map, add one to each of the items is the numbers array, you should store this new array in a variable called plus_one, when you print plus_one it should be [2, 3, 4, 5]

# b. Using .map create the following array [10, 20, 30, 40], you should store this new array in a variable called times_ten

# c. Using .map create the following array [0, 1, 2, 3], you should store this new array in a variable called minus_one

# d. Using .map transform each item in the array so that it now contains the string "<number> is an item in the array"

# e. Using .map if the number is less than 3 return nil otherwise keep the original number

# 3. The following array will be used the second set of .map challenges

# text = ["Lorem ipsum, dolor sit amet consectetur adipisicing elit.", "Distinctio optio velit officia vel, impedit at suscipit unde.", "Nam pariatur numquam rerum. Suscipit ut earum, harum fugiat dolor amet et explicabo!"]

# a. Using .map wrap every item in the text array in <p> tags (opening and closing)

# b. Using .map override every item in the array so that it just contains 3 strings being "Coder Academy"

# c. Using .map return the number of words that are contained in each string in the array, you should end up with [8, 9, 13] 

# .select drills

# 4. The following array will be used in the first set of .select challenges

# numbers = [100, 276, 4, 87]

# a. Using .select, return an array with only numbers greater than 50

# b. Using .select, return an array with only numbers less than or equal to 100

# c. Using .select, return an array with only numbers == to 4

# 5. The following array will be used in the second set of .select challenges

# shoes = [
#   {
#     brand: 'nike',
#     name: 'air zoom structure'
#   },
#   {
#     brand: 'adidas',
#     name: 'ultraboost'
#   },
#   {
#     brand: 'nike',
#     name: 'air zoom pegasus'
#   },
#   {
#     brand: 'asics',
#     name: 'gel nimbus'
#   },
#   {
#     brand: 'asics',
#     name: 'kayano'
#   },
#   {
#     brand: 'adidas',
#     name: 'pureboost go'
#   },
#   {
#     brand: 'nike',
#     name: 'epic react'
#   },
#   {
#     brand: 'nike',
#     name: 'joyride run'
#   }
# ]

# a. Using .select, return an array of hashes that have the brand nike

# b. Using .select, return an array of hashes that have the brand adidas

# c. Using .select, return an array of hashes that have the brand nike or asics

# .find drills

# 6. The following array will be used in the second set of .find challenges

# numbers = [987, 43, 299, 101]

# a. Using .find, return the first item from the array that's less than 200

# b. Using .find, return the first item from the array that's greater than 200 but less than 300

# 7. The following array will be used in the second set of .find challenges

# football_teams = [
#   {
#     name: 'Collingwood',
#     founded: '1892',
#     ground: 'MCG'
#   },
#   {
#     name: 'Essendon',
#     founded: '1872',
#     ground: 'Marvel Stadium'
#   },
#   {
#     name: 'Melbourne',
#     founded: '1858'
#     ground: 'MCG'
#   },
#   {
#     name: 'St Kilda',
#     founded: '1873',
#     ground: 'Marvel Stadium'
#   },
#   {
#     name: 'North Melbourne'
#     founded: '1869',
#     ground: 'Marvel Stadium'
#   },
#   {
#     name: 'Footscray',
#     founded: '1883',
#     ground: 'Marvel Stadium'
#   },
#   {
#     name: 'Hawthorn',
#     founded: '1902',
#     ground: 'MCG'
#   },
#   {
#     name: 'Richmond'
#     founded: '1885',
#     ground: 'MCG'
#   },
#   {
#     name: 'Carlton',
#     founded: '1864',
#     ground: 'Marvel Stadium'
#   },
#   {
#     name: 'Geelong',
#     founded: '1859',
#     ground: 'GMHBA Stadium'
#   }
# ]

# a. Using .find, return the first item from the array of hashes that has a founding year of 1873

# b. Using .find, return the first item from the array of hashes that has a name starting with 'C'

# c. Using .find, return the first item from the array of hashes that has the ground 'GMHBA Stadium'

# d. Using .select, return the items that have the ground 'MCG', then on that filtered array use the .find method to selecr the first team that was founded before 1860

# binding.pry drills

# require 'pry'
# To use pry:
# 1. > gem install pry (we've all already done that!)
# 2. Uncomment line 183 (require 'pry')

# 8. Follow the instructions

# a. Uncomment the while loop code below

# counter = 0

# while counter < 10
#   puts "hello"
#   binding.pry
#   counter += 1
# end 

# b. Execute the code 
# > ruby 01-26-each-map-select-find-pry.rb

# c. Notice that the code stops at the binding.pry, this is our breakpoint, type the word counter into terminal and see what value is returned

# d. Now type continue and notice that the code stops again

# e. Repeat steps c and d 5 times, notice what counter is returning

# f. Type exit! to get out of the binding.pry loop