There are a few examples in this functional programing book about equivalency between different functions. For example, if my understanding is correct it means:
func(param => otherFunc(param))
func(otherFunc) // simplified
And, if I can articulate it in words to the best of my ability, I would say:
A function that takes a certain number of parameters and then only
returns a second function called with those parameters as arguments
is the same as a function that just takes the second function as a single parameter.
Is this a correct understanding? What would be some examples that would show how this would work? The only ones I can think of myself so far are quite trivial, so I’d like to see if I can see more examples to deepen my understanding of some applications of this.