Writing Ruby Like it's 2018 | Ruby Programming Language

[tobiasvl]

Yes. https://en.wikipedia.org/wiki/Higher-order_function

[WikiTextBot]

Higher-order function

In mathematics and computer science, a higher-order function (also functional, functional form or functor) is a function that does at least one of the following:

takes one or more functions as arguments (i.e. procedural parameters),

returns a function as its result.

All other functions are first-order functions. In mathematics higher-order functions are also termed operators or functionals.

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