Functional Recipes¶

This page collects short MakrellPy recipes for common functional patterns. The aim is not to explain functional programming from first principles, but to show how a few recurring tasks look in MakrellPy.

Recipe: partial application¶

{fun add [x y]
    x + y}

add3 = {add 3 _}
{add3 5}

This is one of the most common small patterns in MakrellPy: fix some arguments now, leave the remaining ones open with placeholders, and reuse the resulting function later.

Recipe: pipes¶

[2 3 5] | sum
sum \ [2 3 5]

These examples show both forward and reverse pipe style. They are useful when you want the flow of a small calculation to read left-to-right or right-to-left depending on the situation.

Recipe: operators as functions¶

2 | {+ 3} | {* 5}

Operators can participate in higher-order flow instead of only appearing in ordinary infix expressions.

Recipe: compose several functions¶

add2 = {+ 2}
mul3 = {* 3}
sub = {-}

add2mul3sub5 = add2 >> mul3 >> {sub _ 5}

5 | add2mul3sub5

This shows how small reusable functions can be composed into one larger step and then dropped back into a pipeline.

When to use these patterns¶

These recipes are especially useful when you want:

concise data-flow style
reusable small functions
composition without a lot of surrounding scaffolding