Exercises for App Academy

AppAcademy_.idea_.name

AppAcademy

AppAcademy_.idea_AppAcademy.iml

<?xml version="1.0" encoding="UTF-8"?>
<module type="RUBY_MODULE" version="4">
  <component name="NewModuleRootManager">
    <content url="file://$MODULE_DIR$" />
    <orderEntry type="inheritedJdk" />
    <orderEntry type="sourceFolder" forTests="false" />
  </component>
</module>

AppAcademy_.idea_encodings.xml

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="Encoding" useUTFGuessing="true" native2AsciiForPropertiesFiles="false" />
</project>

AppAcademy_.idea_misc.xml

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="ProjectRootManager" version="2" project-jdk-name="ruby-1.9.3-p545" project-jdk-type="RUBY_SDK" />
</project>

AppAcademy_.idea_modules.xml

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="ProjectModuleManager">
    <modules>
      <module fileurl="file://$PROJECT_DIR$/.idea/AppAcademy.iml" filepath="$PROJECT_DIR$/.idea/AppAcademy.iml" />
    </modules>
  </component>
</project>

AppAcademy_.idea_scopes_scope_settings.xml

<component name="DependencyValidationManager">
  <state>
    <option name="SKIP_IMPORT_STATEMENTS" value="false" />
  </state>
</component>

AppAcademy_.idea_vcs.xml

<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
  <component name="VcsDirectoryMappings">
    <mapping directory="" vcs="" />
  </component>
</project>

AppAcademy_ArrayofPrimesExercise.rb

def is_prime?(num)
  i = 2
  while i < num
    if num % i == 0
      return false
    end
    i += 1
  end
  true
end

def primes(max)
  i = 1
  prime_arr = []
  while i < max
    prime_arr << i if is_prime?(i)
    i += 1
  end
  prime_arr.each {|prime| print "#{prime}, "}
end

print 'Enter a number:'
max = Integer(gets.chomp)

primes(max)

AppAcademy_IsPrimeExercise.rb

puts "Let's see if the number is prime or not"
print 'Enter a number to analyze:'
n = Integer(gets.chomp)

def is_prime?(num)
  i = 2
  while i < num
    if num % i == 0
      return puts 'false'
    end
    i += 1
  end
  return puts 'true'
end

is_prime?(n)

AppAcademy_PowExercise.rb

print 'Enter a number (base):'
n1 = Integer(gets.chop)

print 'Enter another number (exponent):'
n2 = Integer(gets.chomp)

def pow(base, expo)
  return puts "it has to be positive numbers" if (base <= 0 || expo <= 0)
  result = 1
  expo.times do
    result = result*base
  end
  puts "The result is #{result}"
end

pow(n1, n2)

AppAcademy_SumExercise.rb

def sum(an)
  result = 0
  an.each do |num|
    result = result + num
  end
  puts "The result is #{result}"
end

nums = [2,4,6,8,2,8,125,-32,2,0,0]
sum(nums)