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| </div><div id='content' class='page-1'><div class='row'><div class='row-fluid'><div class='col-lg-3'><ul class='nav-sidebar'><li><a href='./'>Blog index</a></li><li class='active'><a href='#doc'>Checking Wordle with Groovy</a></li></ul><br/><ul class='nav-sidebar'><li style='padding: 0.35em 0.625em; background-color: #eee'><span>Related posts</span></li><li><a href='./groovy-null-processing'>Groovy Processing Nulls In Lists</a></li><li><a href='./zipping-collections-with-groovy'>Zipping Collections with Groovy</a></li><li><a href='./groovy-list-processing-cheat-sheet'>Groovy List Processing Cheat Sheet</a></li><li><a href='./deep-learning-and-eclipse-collections'>Deep Learning and Eclipse Collections</a></li><li><a href='./deck-of-cards-with-groovy'>Deck of cards with Groovy, JDK collections and Eclipse Collections</a></li><li><a href='./groovy-haiku-processing'>Groovy Haiku processing</a></li><li><a href='./lego-bricks-with-groovy'>Lego Bricks with Groovy</a></li><li><a href='./fruity-eclipse-collections'>Fruity Eclipse Collections</a></li><li><a href='./groovy-sequenced-collections'>Groovy and Sequenced Collections (JEP-431)</a></li></ul></div><div class='col-lg-8 col-lg-pull-0'><a name='doc'></a><h1>Checking Wordle with Groovy</h1><p><span>Author: <i>Paul King</i></span><br/><span>Published: 2023-02-08 12:00AM</span></p><hr/><div class="paragraph"> |
| <p>This <a href="https://donraab.medium.com/comparing-my-smalltalk-and-eclipse-collections-wordle-kata-solutions-4058ac7d8ca0">article</a> by <a href="https://twitter.com/TheDonRaab">Donald Raab</a> |
| looks at writing a Wordle checker in Smalltalk and Java using <a href="https://github.com/eclipse/eclipse-collections">Eclipse Collections</a>. Let’s look at doing the same in Groovy. |
| We could easily use Eclipse Collections with Groovy |
| but let’s just use JDK collections in this blog.</p> |
| </div> |
| <div class="paragraph"> |
| <p>In Wordle, we have to try to guess a hidden word. |
| For each guess we make, we are given a result. |
| For each letter in the correct place, the capital |
| letter is returned. Sometimes we’ll guess the |
| correct letter but in the wrong place. In such |
| cases, a lowercase letter appears in our result. |
| A letter never appears more times in the result |
| than what occurs in the hidden word.</p> |
| </div> |
| <div class="paragraph"> |
| <p>First, our test cases (from the original article):</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="prettyprint highlight"><code data-lang="groovy">def triples = [ |
| [".....", "aaaaa", "bbbbb"], |
| ["A....", "aaaaa", "abbbb"], |
| [".A...", "aaaaa", "babbb"], |
| ["..A..", "aaaaa", "bbabb"], |
| ["...A.", "aaaaa", "bbbab"], |
| ["....A", "aaaaa", "bbbba"], |
| [".a...", "abbbb", "caccc"], |
| ["..a..", "abbbb", "ccacc"], |
| ["...a.", "abbbb", "cccac"], |
| ["....a", "abbbb", "cccca"], |
| ["A....", "abbbb", "accca"], |
| ["A....", "abbbb", "accaa"], |
| ["A..a.", "aabbb", "accaa"], |
| ["AA...", "aabbb", "aacaa"], |
| ["...aa", "aabbb", "cccaa"], |
| ["..A..", "bbabb", "aaaaa"], |
| ["AAAAA", "aaaaa", "aaaaa"], |
| ["BRAVO", "bravo", "bravo"]]</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Now we’ll write our method for checking the list |
| of letters from the hidden word with the list of |
| letters in our guess. Comparing this to the original article, it has similarities |
| to some of the Smalltalk solutions and a couple of the Java solutions.</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="prettyprint highlight"><code data-lang="groovy">def checkGuess(hs, gs) { |
| def remaining = hs.groupBy() // <b class="conum">(1)</b> |
| def matches = [hs, gs].transpose().collect{ h, g -> // <b class="conum">(2)</b> |
| if (h == g) { remaining[g].pop(); g.toUpperCase() } |
| else '.' |
| } |
| gs.eachWithIndex { g, i -> // <b class="conum">(3)</b> |
| if (matches[i] == '.' && remaining[g]?.remove(g)) { |
| matches[i] = g |
| } |
| } |
| matches.join() |
| }</code></pre> |
| </div> |
| </div> |
| <div class="colist arabic"> |
| <ol> |
| <li> |
| <p>We group the hidden letters by themselves. Our bag equivalent.</p> |
| </li> |
| <li> |
| <p>In the first pass, we collect exact matches using a zip |
| operator, called <code>transpose</code> in Groovy.</p> |
| </li> |
| <li> |
| <p>In the second pass, we collect letters which match but in a different position.</p> |
| </li> |
| </ol> |
| </div> |
| <div class="paragraph"> |
| <p>Finally, we check our method against the test cases:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="prettyprint highlight"><code data-lang="groovy">triples.each { result, hidden, guess -> |
| assert result == checkGuess(hidden.toList(), guess.toList()) |
| }</code></pre> |
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