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require 'minitest/autorun' | |
require 'minitest/pride' | |
# Write two classes which inherit from the Vehicle class below. You will also | |
# need to add a method to the Vehicle class during this challenge. | |
class Vehicle | |
def initialize(make, model) | |
@make = make |
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class OddArray | |
def initialize(odd_array) | |
@odd_array = odd_array | |
end | |
def to_a | |
odd_only_array = [] | |
@odd_array.each do |number| | |
if number.class == Fixnum && number.odd? | |
odd_only_array << number |
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require 'minitest/autorun' | |
require 'minitest/pride' | |
# Write a class which has an initialize method, a reader method, a private | |
# method, and a class method. | |
# WRITE YOUR CODE HERE. | |
class Goat | |
def initialize(name = "default") | |
@name = name |
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require 'minitest/autorun' | |
require 'minitest/pride' | |
# Write a method which accepts an array and returns a sum of the elements in the | |
# array. Specifying a second parameter (e.g. 3) will allow you to sum all the | |
# items starting from index 3. Specifying three parameters will allow you to sum | |
# between two indices (e.g. everything between 3 and 6, inclusive). | |
# WRITE YOUR CODE HERE. Name your method `subsum`. | |
def subsum(array, x = -1, y = -1) |
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require 'minitest/autorun' | |
require 'minitest/pride' | |
def palindrome?(input) | |
input.downcase! | |
array = input.split(" ") | |
array = array.join | |
input2 = array.to_s | |
if input2 == input2.reverse | |
return true |
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require 'minitest/autorun' | |
require 'minitest/pride' | |
# Write a method which accepts an array and returns a hash. Each item in the | |
# array will be a string, and the returned hash should have last names as keys | |
# and first names as values. | |
# WRITE YOUR CODE HERE. Name your method `names`. | |
def names(array) |
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require 'minitest/autorun' | |
require 'minitest/pride' | |
require 'prime' | |
# Write a method which returns the first n primes, where n is provided to the | |
# method as a parameter. | |
# | |
# Remember that the % operator (modulo) is your friend. It returns a zero if one | |
# number is divisible by another number. In other words, 4 % 2 == 0. |
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require 'minitest/autorun' | |
require 'minitest/pride' | |
# Write a method which accepts an array as the first paramater and a number | |
# as the second parameter. Return true if two of the numbers in the array sum | |
# to the second parameter. | |
# WRITE YOUR CODE HERE. Name your method `complements?`. | |
def complements?(array, sum) | |
if array == nil || array.length < 2 |
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#1 | |
SELECT * FROM authors WHERE email = "[email protected]" | |
#2 | |
SELECT * FROM authors ORDER BY created_at DESC LIMIT 1; | |
#3 | |
SELECT question_text, count(*) FROM questions GROUP BY question_type | |
#4 |
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require 'minitest/autorun' | |
require 'minitest/pride' | |
# Write a series of methods which use the .any, .all, .map, .select, .reject, and | |
# .reduce methods in Enumerable. Each of your methods should be one line. | |
# WRITE YOUR CODE HERE. In this challenge, names longer than 5 characters are | |
# considered long. | |
def has_even?(array) | |
array.any? {|n| n % 2 == 0} |