Tyler Rockwell TylerRockwell

D3

d3.select("item"); - selects an element on the page. Stores much more than DOM

d3.selectAll("item"); - selects all items of a given element on a page

d3.select(this);

d3.select("svg").select("circle");

	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.

	def has_even?(arr)
	arr.any?(&:even?)
	end

	require 'minitest/autorun'
	require 'minitest/pride'

	# Write modules which will be included in the classes below which will give
	# intelligent and bipedal behavior.
	#
	# You may not write any methods in the existing classes, but you may write
	# `include` statements in them.
	module Speak
	def say_name

	Detailed Ruby Questions

	When would you use a hash instead of an array?
	An array would be used to store multiple values in an ordered list. A hash should be used when you
	need to store key value pairs. For example, if you were to store a person's information, putting it in
	an array would require that you remember the order that the information is stored in, and this could change
	as the information is changed or updated. Using a hash, however would allow you to store information by named keys.
	So, to access a person's phone number you could use person[:phone_number] instead of person[3].

	When would you use a symbol instead of a string?

	What command do you run if you want to discard all changes since your last commit?
	git stash

	What command do you use if you run git add and then want to revert it?
	git reset

	What command do you use if you run git commit and then want to revert it?
	git checkout previous commit id
	that other command that fixes detached head mode that I always have to google.

	require 'minitest/autorun'
	require 'minitest/pride'

	# 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.

	# WRITE YOUR CODE HERE. Name your method `primes`.

	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.

	def complements?(array, sum)
	return false unless array
	return false if array.length < 2