Ruby_Programming

Ruby
1

What should be the logic to determine whether object is interger,float or string if the object is given as the input by the user?

2

If I understand correctly, you want to “guess” what type some data is that a user provided? The best way would probably be to use a regular expression. Otherwise, maybe only have “allowed” values and then you can more easily match them up.

3 
foo = "bar"
case foo
when String
  puts "I'm a string"
else
  puts "Bad input"
end
4

Hi! I have a project for Edu Birdie, and I need some materials on Ruby. Can you suggest some?

5

Hello @lorenzomitchell,

I would recommend you to take a look here:
https://www.ruby-lang.org/en/documentation/

If you need something specific, please let me know.

6

I’ve read your website, as far as I see it’s about essays in general. You can ask Leo Green essay writer about this issue cause he is both developer and business owner.

9

First things first, inputs are just string. You have to use the .to_f and to_i methods to convert a String object to Float and Integer respectively.

1. The is_a?(Class) method:

The is_a? method is available on any object. It needs an argument, and it returns true or false:

a = STDIN.gets.to_f    # Note that if you use .to_f method, it's always going to be a `Float` object
a.is_a?(Float)    # => true

2. The kind_of?(Class) method

a = STDIN.gets.to_f 
a.is_a?(Integer)    # => false

3. The integer? method

a = STDIN.gets.to_f
a.integer?    # => false
a = a.ceil
a.integer?    # => true

4. The Case Subsumption Operator

a = STDIN.gets.to_f
Float === a    # => true

5. The Case Statement

The above codes can be used with an if statement:
puts :Float if Float === a

But you can also do something based on the class of the Object with a nice case statement.

a = STDIN.gets.to_f
r = case a
    when Float then :hi
    when Integer then :hello
    else :none
end

6. The class method:

This is a dirty trick. I just wanted you show you that you can use that. But I wouldn’t really prefer this trick on the above ones.

a = STDIN.gets.to_f 
a.class == Float          # => true
a.class == Integer        # => false
a.class == FalseClass     # => false

Hope this helps!