How to resolve the algorithm Add a variable to a class instance at runtime step by step in the Falcon programming language

Published on 12 May 2024 09:40 PM
#Falcon

How to resolve the algorithm Add a variable to a class instance at runtime step by step in the Falcon programming language

Table of Contents

Problem Statement

Demonstrate how to dynamically add variables to an object (a class instance) at runtime. This is useful when the methods/variables of an instance are based on a data file that isn't available until runtime. Hal Fulton gives an example of creating an OO CSV parser at An Exercise in Metaprogramming with Ruby. This is referred to as "monkeypatching" by Pythonistas and some others.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Add a variable to a class instance at runtime step by step in the Falcon programming language

Source code in the falcon programming language

vect = [ 'alpha', 'beta', 'gamma' ]
vect.dump = function ()
  for n in [0: self.len()]
    > @"$(n): ", self[n]
  end
end
vect += 'delta'
vect.dump()

0: alpha
1: beta
2: gamma
3: delta

function sub_func( value )
  self['prop'] -= value
  return self.prop
end

dict = bless( [
  'prop' => 0,
  'add' => function ( value )
    self.prop += value
    return self.prop
  end ,
  'sub' => sub_func
])

dict[ 'newVar' ] = "I'm Rich In Data"

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