Question

I am trying to do something a little unusual as a workaround to another problem. I would like to store ruby commands and execute them later.

I can store commands in variables ok but I can only print them to the screen, I played around with flatten to see could I somehow convert them to a usable form but it didn’t work.

Here is an example:

Command_Store = Array[puts "Hello World", my_first_array = array.new, puts "Hello World again"]

execute.Command_Store[0] => Hello World 
execute.Command_Store[1] => my.first_array[] 
execute.Command_Store[2] => Hello World again

Answer 1

Also you can use lambda for this kind of task:

command_store = []
command_store << lambda { puts "Hello World" }
command_store << lambda { my_first_array = Array.new }
command_store << lambda { puts "Hello World again" }

command_store.each(&:call) 
#=> Hello World
#=> Hello World again

UPDATE:

You can capture the variable my_first_array, that’s what called the closure

my_first_array = [3,4,5,6,7]

command_store << lambda { puts my_first_array[0] }

command_store.each(&:call)
#=> ...
#=> 3