There are two problems with the current solution. First of all, there is quite a bit of duplication in the predicate factory functions above, when initially I told you that the composable nature of functions mad
Now consider following implementation of map & filter transformation functions: function map(f, source) { return reducible(function accumulator(next, initial) { return reduce(source, function reducer(result, input) { return next(result, f(input)) }, initial) }) } function filter(predicate, sourc...
In Rust, higher-order functions are used extensively for various operations on collections. They provide a way to perform operations like transformation, filtering, and accumulation without the need…
E.g.fn::sort_by(projection_fn)is a higher-order function that returns a unary function that takes inputs by value (normally passed as rvalue), sorts them by the user-provided projection, and returns them by value (non-copying). Similarly,fn::where(predicate)filters the input to those ...