Ruby – when to use instance variables vs parameters between methods?

I’m writing several methods that call other methods.

Why is “dependency injection” ok, but not “the opposite of preserve whole object (pass required parameters only)”?

According to Why should I use dependency injection?, “dependency injection” has some advantages, for example:

Is it better to have constructors with or without parameters?

Is it better to have constructors with or without parameters and why?

Is it better to have constructors with or without parameters?

Is it better to have constructors with or without parameters and why?

Is it better to have constructors with or without parameters?

Is it better to have constructors with or without parameters and why?

Is it better to have constructors with or without parameters?

Is it better to have constructors with or without parameters and why?

Is it better to have constructors with or without parameters?

Is it better to have constructors with or without parameters and why?

Is it better to have constructors with or without parameters?

Is it better to have constructors with or without parameters and why?

Why not annotate function parameters?

To make this question answerable, let’s assume that the cost of ambiguity in the mind of a programmer is much more expensive then a few extra keystrokes.

Why not annotate function parameters?

To make this question answerable, let’s assume that the cost of ambiguity in the mind of a programmer is much more expensive then a few extra keystrokes.