this post was submitted on 08 Jul 2023
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Everyone should have a tool-building factory factory factory (i.ibb.co)
submitted 1 year ago by [email protected] to c/programmer_humor
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[–] [email protected] 1 points 1 year ago

I think the main reason OOP has a well-known term and pattern for dependency injection is to differentiate these two (out of multiple) options:

  • the constructor of my object creates other objects it depends on itself
  • I construct the dependencies of my object elsewhere and pass them in to the constructor and use an interface to make it easy to swap behaviour

However, this becomes less of a pattern in functional programming as you wouldn't make such objects to begin with. In FP, you pass all parameters where a function is invoked, and DI just becomes using generic parameters. You wouldn't instantiate a dependency on each function call after all.

As this is such a minor change, it's not really talked about much and it's not really a pattern,