What can I .call? complete noob question, sorry

Ruby
1

Hello

I am an absolute beginner in Ruby, having trouble understanding when to
use which objects - class, module, proc. I have tried googling the
available documentation but without success.

If I have

mystring = MyApp.call(someargs)

then what sort of thing should MyApp be? An instance of a class? A
module? A proc?

Thank you very much

2

Depends on what you want do exactly. What is MyApp, what is call, what
do you want it to do?

To simplify things, think of it like this:

  • Proc: A function
  • Module: A collection of functions; or a namespace.
  • Class: A datatype. Strings, Integers, Arrays etc. are datatypes – you
    can create your own datatypes.
3

D. D. wrote in post #1178938:

Hello

I am an absolute beginner in Ruby, having trouble understanding when to
use which objects - class, module, proc. I have tried googling the
available documentation but without success.

If I have

mystring = MyApp.call(someargs)

then what sort of thing should MyApp be? An instance of a class? A
module? A proc?

Thank you very much

class MyApp
def self.call(arg)
puts arg
end
end

MyApp.call(‘hello’)

–output:–
“hello”

I am an absolute beginner in Ruby, having trouble understanding when to
use which objects - class, module, proc

Use whatever will work. Try them one by one until you come up with
something that works. When you are learning computer programming, you
are learning a series of tricks. You may not know why a trick will be
useful, but as you get more experience, you will start being able to
match the tricks you learned to problems you are trying to solve.