wyncode_methods.rb

gistfile1.txt

# Author: piscu Carranza
# January 19, 2015
# Week Two - Wyncode
# Profile 

# Problems With Floats

puts <<END
Using floats can be a pain. Therefore,
here is an idea on how to make sure no 
random digits are added (stupid binary!).

END

total = 0

def addToTotal(item, total) # Takes two arguments to keep track of total
	total += (item * 100)
	total = total.to_i #to_i in order to drop decimal sign
	return total
end

def backToDecimal(total)
	return total / 100.0 # Divide by Float so that it won't chop the decimals
end

puts <<END
Having a Hash with Item => Value,
we can then use these functions to 
keep track of our total without adding 
random decimals. When we are ready to 
check our balance at the end of the day,
we divide by 100 to go back to decimals.

END

# Tests with floats/integers.
total = addToTotal(33.50, total)
total = addToTotal(53, total)
puts backToDecimal(total)
puts
puts


# Christmas Tree 
# Program to Print christmas tree by looping rather than typing


def print_tree(char)
	num_star = 1

	4.downto(1).each do |num_spaces| # Loop backwards to determine spaces needed
	print(' ' * num_spaces) 
	puts (char * num_star)
	num_star += 2
	end
end
puts "Loop to create a christmas tree based on the character selected."
puts "Please select any character to display a tree."
response = gets.chomp 
print_tree(response) # Tests with input from stupid/evil users.

# Using Join and Split
# I kept trying to split and then join, so that took about 50 tries

puts <<END
This statement shows how to convert [1,2,3]
to ["1", "2", "3"] by combining statements.

END

def split_join(*arr)
	print arr.join(",").split(",")
end
# Tests: Will convert everything to one array, don't need it to be exactly an array.
split_join([1,2,3])
split_join([1, nil, 3])
split_join(["a", 3])
split_join("a", "b", "c")
split_join(1, 3, 5)

puts 
puts
puts

puts <<END
split does not work on arrays, so I converted to_s
first, but that did not work. So I then tried join 
first to see what would happen. Once I got a string
of the numbers, separated by commas, and read that
split would create an array, I knew i was on the
right track and it finally worked.

END