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ktulsyan's solution

to Acronym in the OCaml Track

Published at Aug 05 2019 · 0 comments
Instructions
Test suite
Solution

Note:

This exercise has changed since this solution was written.

Convert a phrase to its acronym.

Techies love their TLA (Three Letter Acronyms)!

Help generate some jargon by writing a program that converts a long name like Portable Network Graphics to its acronym (PNG).

Getting Started

  1. Install the Exercism CLI.

  2. Install OCaml.

  3. For library documentation, follow Useful OCaml resources.

Running Tests

A Makefile is provided with a default target to compile your solution and run the tests. At the command line, type:

make

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.

Feedback, Issues, Pull Requests

The exercism/ocaml repository on GitHub is the home for all of the Ocaml exercises.

If you have feedback about an exercise, or want to help implementing a new one, head over there and create an issue or submit a PR. We welcome new contributors!

Source

Julien Vanier https://github.com/monkbroc

test.ml

open OUnit2
open Acronym

let ae exp got _test_ctxt =
  assert_equal exp got ~printer:(fun x -> x )

let tests = [
  "basic" >::
  ae "PNG" (acronym "Portable Network Graphics");
  "lowercase words" >::
  ae "ROR" (acronym "Ruby on Rails");
  "punctuation" >::
  ae "FIFO" (acronym "First In, First Out");
  "all caps word" >::
  ae "GIMP" (acronym "GNU Image Manipulation Program");
  "punctuation without whitespace" >::
  ae "CMOS" (acronym "Complementary metal-oxide semiconductor");
  "very long abbreviation" >::
  ae "ROTFLSHTMDCOALM" (acronym "Rolling On The Floor Laughing So Hard That My Dogs Came Over And Licked Me");
  "consecutive delimiters" >::
  ae "SIMUFTA" (acronym "Something - I made up from thin air");
  "apostrophes" >::
  ae "HC" (acronym "Halley's Comet");
  "underscore emphasis" >::
  ae "TRNT" (acronym "The Road _Not_ Taken");
]

let () =
  run_test_tt_main ("acronym tests" >::: tests)

acronym.ml

open Core

let rec first_character s = 
  if(String.is_empty s) then None
  else 
    let c = String.get s 0
    in if(Char.is_alpha c) then Some(c)
    else first_character (String.sub s ~pos:1 ~len:((String.length s)-1))

let words s = String.split_on_chars s ~on:[' ';'-']

let acronym s = 
  words s
  |> List.map ~f:first_character
  |> List.fold ~init:"" ~f:(fun acc co -> match co with 
      | None -> acc
      | Some(c) -> (Char.to_string c)^acc
    )
  |> String.uppercase
  |> String.rev

acronym.mli

(* Creates an acronym from a string. *)
val acronym : string -> string

What can you learn from this solution?

A huge amount can be learned from reading other people’s code. This is why we wanted to give exercism users the option of making their solutions public.

Here are some questions to help you reflect on this solution and learn the most from it.

  • What compromises have been made?
  • Are there new concepts here that you could read more about to improve your understanding?