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to Acronym in the Elm Track

Published at Apr 19 2021 · 0 comments
Instructions
Test suite
Solution

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).

Elm Installation

Refer to the Installing Elm page for information about installing elm.

Writing the Code

The code you have to write is located inside the src/ directory of the exercise. Elm automatically installs packages dependencies the first time you run the tests so we can start by running the tests from the exercise directory with:

$ elm-test

To automatically run tests again when you save changes:

$ elm-test --watch

As you work your way through the tests suite in the file tests/Tests.elm, be sure to remove the skip <| calls from each test until you get them all passing!

Source

Julien Vanier https://github.com/monkbroc

Submitting Incomplete Solutions

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

Tests.elm

module Tests exposing (tests)

import Acronym exposing (abbreviate)
import Expect
import Test exposing (Test, describe, skip, test)


tests : Test
tests =
    describe "Acronym"
        [ test "basic" <|
            \_ ->
                Expect.equal "PNG"
                    (abbreviate "Portable Network Graphics")
        , skip <|
            test "lowercase words" <|
                \_ ->
                    Expect.equal "ROR"
                        (abbreviate "Ruby on Rails")
        , skip <|
            test "punctuation" <|
                \_ ->
                    Expect.equal "FIFO"
                        (abbreviate "First In, First Out")
        , skip <|
            test "all caps word" <|
                \_ ->
                    Expect.equal "GIMP"
                        (abbreviate "GNU Image Manipulation Program")
        , skip <|
            test "punctuation without whitespace" <|
                \_ ->
                    Expect.equal "CMOS"
                        (abbreviate "Complementary metal-oxide semiconductor")
        ]
module Acronym exposing (abbreviate)


abbreviate : String -> String
abbreviate phrase =
    phrase
        |> String.replace "-" " "
        |> String.toUpper
        |> String.words
        |> List.map (String.left 1)
        |> String.join ""

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