I have a class api that pulls objects from a third party api and builds them into objects that are subclasses of type apiobject.
Ruby define constant dynamically.
For two of them i use attr reader.
But for those which need to be initialized to an empty array i do the following.
They are special variables that have the appearance of local variables but behave like constants.
You cannot assign any value to these variables.
This will produce the following result value of first constant is 100 value of second constant is 200 ruby pseudo variables.
What is a constant in ruby.
It will define a new method on the metaclass of the o local variable constant or result of method call.
The algorithm for qualified constants goes like this.
Def keys define here end def keys value define here end of course if you won t be using multiple keys to access an element you re fine with using just key instead of.
It s not through hash it s array access operator.
A constant is a type of variable which always starts with a capital letter.
Make instance variable accessible through hash in ruby.
To implement it you need to define methods.
You can use predefine variables to perform a specific task like when dealing with interpreter parameters or regular expressions.
The constant is looked up in the parent and its ancestors.
The final way of defining a method dynamically in ruby is using def or define method.
Apiobject subclasses match the object names from the api that i m p.
Kernel and basicobject are still checked though.
They can only be defined outside of methods unless you use metaprogramming.
Myconstant hello hello unlike other programming languages ruby.
Every predefined variable has its own specification.
In ruby 2 5 object is skipped if present among the ancestors.
Let s define parent to be that qualifying class or module object that is billing in the example above.
Ruby contains a wide range of predefined variables.
Constants are used for values that aren t supposed to change but ruby doesn t prevent you from changing them.
Constants are declared by beginning the variable name with a capital letter a common convention for declaring constants is to use uppercase letters for the entire name.
