How to resolve the algorithm List comprehensions step by step in the OCaml programming language

Published on 12 May 2024 09:40 PM

How to resolve the algorithm List comprehensions step by step in the OCaml programming language

Table of Contents

Problem Statement

A list comprehension is a special syntax in some programming languages to describe lists. It is similar to the way mathematicians describe sets, with a set comprehension, hence the name. Some attributes of a list comprehension are:

Write a list comprehension that builds the list of all Pythagorean triples with elements between   1   and   n. If the language has multiple ways for expressing such a construct (for example, direct list comprehensions and generators), write one example for each.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm List comprehensions step by step in the OCaml programming language

Source code in the ocaml programming language

let* x = enumeration in
  if not condition then empty else
  return expression


let pyth n =
  let* x = 1 -- n in
  let* y = x -- n in
  let* z = y -- n in
    if x * x + y * y <> z * z then [] else
    [x, y, z]


let (let*) xs f = List.concat_map f xs
let (--) a b = List.init (b-a+1) ((+)a)


  

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