midterm part 2 submission

160095/1 todo/run.rb

+require './to_do_list'
+
+todo = ToDoList.new
+
+puts "================ \n"
+
+todo.add_task("Clean room")
+todo.add_task("Submit MIS21 HW")
+todo.add_task("Study for MIS21 midterms")
+todo.add_task("Study for Stat midterms")
+todo.add_task("Submit advisement form")
+todo.add_task("Consult for final project")
+
+puts "================ \n"
+
+todo.view_pending_tasks
+
+puts "================ \n"
+
+todo.accomplish_task(0)
+todo.accomplish_task(2)
+todo.accomplish_task(2)
+
+puts "================ \n"
+
+todo.view_accomplished_tasks
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160095/1 todo/to_do_list.rb

+class ToDoList
+
+    def initialize
+        @pendingTasks = []
+        @accomplishedTasks = []
+    end
+
+    def add_task(task_name)
+        @pendingTasks.push(task_name)
+        puts "#{task_name} has been added to your task list"
+    end
+
+    def view_pending_tasks
+        puts 'Pending tasks:'
+        @pendingTasks.each do |task|
+            i = @pendingTasks.index(task)
+            i += 1
+            puts "(#{i}) #{task}"
+        end
+    end
+
+    def accomplish_task(index)
+        temp = @pendingTasks[index]
+        @pendingTasks.delete_at(index)
+        @accomplishedTasks.push(temp)
+        puts "#{temp} has been marked as accomplished"
+    end
+
+    def view_accomplished_tasks
+        puts 'Accomplished tasks:'
+        @accomplishedTasks.each do |task|
+            i = @accomplishedTasks.index(task)
+            i += 1
+            puts "(#{i}) #{task}"
+        end
+    end
+
+end
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160095/2 budget/budget.rb

+require 'date'
+
+class Budget
+    
+    attr_accessor :balance
+
+    def initialize(initial_balance)
+        @balance = initial_balance
+        @expenses = {}
+        @income = {}
+        puts "Initial balance: %.2f" % [@balance]
+    end
+
+    def add_expense(item, amount, date)
+        date = Date.parse(date)
+        str = date.strftime('%B %e %Y')
+        str1 = date.strftime('%B')
+
+        if @expenses.keys.include?(str1) == false
+            @expenses[str1] = amount
+        else
+            x = @expenses[str1]
+            x += amount
+            @expenses[str1] = x
+        end
+
+        @balance -= amount
+        puts "#{item}: An amount of %.2f was deducted from the balance on #{str}" % [amount]
+    end
+
+    def add_income(item, amount, date)
+        date = Date.parse(date)
+        str = date.strftime('%B %e %Y')
+        str1 = date.strftime('%B')
+
+        if @income.keys.include?(str1) == false
+            @income[str1] = amount
+        else
+            x = @income[str1]
+            x += amount
+            @expenses[str1] = x
+        end
+
+        @balance += amount
+        puts "#{item}: An amount of %.2f was added to the balance on #{str}" % [amount]
+    end
+
+    def monthly_report(month, year)
+        date = Date.parse("#{year}0#{month}01")
+        str = date.strftime('%B %Y')
+        str1 = date.strftime('%B')
+        puts '===================================='
+        puts "MONTHLY REPORT: #{str}"
+        puts "Total Expense: %.2f" % @expenses[str1]
+        puts "Total Income: %.2f" % @income[str1]
+        puts '===================================='
+    end
+
+    def current
+        puts "Balance: %.2f" % [@balance]
+    end
+
+end
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160095/2 budget/run.rb

+require './budget'
+
+budget = Budget.new(50000.00)
+budget.add_expense("Petron", 5000.00, "2017-06-15")
+budget.add_income("Work", 6000.00, "2017-06-26")
+budget.add_expense("National Bookstore", 2500.00, "2017-06-27")
+budget.add_expense("Gonzaga", 200.00, "2017-06-27")
+budget.add_income("Freelance", 10000.00, "2017-07-10")
+budget.current
+budget.monthly_report(6,2017)
+budget.add_expense("Nintendo Switch", 19000.00, "2017-07-15")
+budget.add_expense("Samsung S8 Edge", 39300.00, "2017-07-20")
+budget.monthly_report(7,2017)
+budget.current
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160095/3 knn/knn.rb

+@distances = []
+
+def classify_with_knn(data, k, unknown_data_point)
+    data.each do |data|
+        a = data
+        b = unknown_data_point
+        label2 = a[:label]
+        value = distance(a, b)
+        temp = {label: label2, distance: value}
+        @distances.push(temp)
+    end
+
+    sorted = @distances.sort_by{ |x| x[:distance]}
+
+    dog = 0
+    cat = 0
+    i = 0
+
+    while i < k do
+        temp2 = sorted[i]
+        if temp2[:label] == 'cat'
+            cat += 1
+        else
+            dog += 1
+        end
+        i += 1
+    end
+
+    result = []
+    if cat > dog
+        result.push('cat', cat)
+        return result
+    else
+        result.push('dog', dog)
+        return result
+    end
+
+end
+
+def distance (a, b)
+    temp = a[:features]
+    temp2 = b[:features]
+    output = 0
+    i = 0
+
+    temp.each do |v1|
+        v2 = temp2[i]
+        output += (v1 - v2)**2
+        i += 1
+    end
+
+    return output
+end
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160095/3 knn/run.rb

+require './knn'
+
+collection = [
+	{label: 'cat', features: [12, 1, 1] },
+	{label: 'cat', features: [13, 3, 1] },
+	{label: 'cat', features: [15, 1, 1] },
+	{label: 'dog', features: [3, 12, 2] },
+	{label: 'dog', features: [4, 11, 2] },
+	{label: 'dog', features: [1, 11, 2] },
+	{label: 'cat', features: [11, 4, 1] },
+	{label: 'cat', features: [13, 2, 1] },
+	{label: 'dog', features: [3, 13, 2] },
+	{label: 'dog', features: [7, 12, 2] }
+]
+
+unknown_data_point = { label: nil, features: [4, 2, 1] }
+result = classify_with_knn(collection, 5, unknown_data_point)
+puts "Result: #{result[0]} with #{result[1]} neighbors"
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160095/4 success/game.rb

+require './person'
+
+names = ['christian', 'noel', 'jc']
+people = []
+
+names.each do |name|
+    name = Person.new(name)
+    people.push(name)
+end
+
+p1 = people.sample
+p2 = people.sample
+while p2 == p1
+    p2 = people.sample
+end
+
+while true
+    puts "Who's likely to succeed? Press any key to exit."
+    puts "1 for #{p1.name}"
+    puts "2 for #{p2.name}"
+    choice = gets.chomp
+
+    if choice == '1'
+        Person.update_success_points(p1, p2)
+
+        temp = p2
+        while (p2 == p1 || p2 == temp)
+            p2 = people.sample
+        end
+    elsif choice == '2'
+        Person.update_success_points(p2, p1)
+
+        temp = p1
+        while (p1 == p2 || p1 == temp)
+            p1 = people.sample
+        end
+    else
+        puts 'Exiting...'
+        sorted = people.sort_by {|person| person.success_points}
+        sorted.reverse_each do |person|
+            if (person.success_points >= 0 )
+                puts "#{person.name} #{person.success_points}"
+            else
+                puts "#{person.name} 0.0"
+            end
+        end
+        break
+    end
+end
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160095/4 success/person.rb

+class Person
+    
+    attr_accessor :name, :success_points
+
+    def initialize(name)
+        @name = name
+        @success_points = 0.0
+    end
+
+    def to_s
+        puts @name
+    end
+
+    def expected_score(another_person)
+        rB = another_person.success_points
+        rA = @success_points
+        x = (rB-rA)/400
+        eA = 1/(1 + 10**x)
+        return eA
+    end
+
+    def new_success_points(score, another_person)
+        rA = @success_points
+        eA = expected_score(another_person)
+        sA = score
+        result = rA + 32 * (sA - eA)
+        return result
+    end
+
+    def self.update_success_points(winner, loser)
+        points1 = winner.new_success_points(1, loser)
+        points2 = loser.new_success_points(0, winner)
+
+        winner.success_points += points1
+        loser.success_points += points2
+    end
+
+end
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