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For example, : symbol - I'm trying to work out what the : means, and how it differs, say, for example, from @ and also from no symbol whatsoever.
If there's a guide that would be really helpful!
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The @ symbol before a variable tells Ruby that we are working with an instance variable, and @@ before a variable tells us we are working with a class variable. We use @ before a variable in instance methods within a class to tell Ruby to access that attribute (instance variable) of the instance.
:: Lets you access a constant, module, or class defined inside another class or module.
In Ruby, the at-sign ( @ ) before a variable name (e.g. @variable_name ) is used to create a class instance variable.
Ruby variables are locations which hold data to be used in the programs. Each variable has a different name. These variable names are based on some naming conventions. Unlike other programming languages, there is no need to declare a variable in Ruby.
It's a symbol, which is a Ruby language construct.
Symbols are similar to strings, but this blog post explains the details.
@ means an instance variable on the class: it's basically a variable that's shared among all methods on an instance of a class. It has no relation to :.
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