diff --git a/01-introduction.html b/01-introduction.html
index 4c6f3db6..bb2d09a6 100644
--- a/01-introduction.html
+++ b/01-introduction.html
@@ -573,7 +573,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
   "identifier": "https://librarycarpentry.github.io/lc-open-refine/01-introduction.html",
   "dateCreated": "2018-04-12",
   "dateModified": "2023-05-01",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
 }
 
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diff --git a/02-importing-data.html b/02-importing-data.html
index 863158f3..1a113c81 100644
--- a/02-importing-data.html
+++ b/02-importing-data.html
@@ -543,7 +543,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
   "identifier": "https://librarycarpentry.github.io/lc-open-refine/02-importing-data.html",
   "dateCreated": "2018-04-12",
   "dateModified": "2023-11-16",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/03-working-with-data.html b/03-working-with-data.html
index f022e100..96ceb182 100644
--- a/03-working-with-data.html
+++ b/03-working-with-data.html
@@ -528,7 +528,7 @@ <h3 class="callout-title">Splitting Subjects into separate cells<a class="anchor
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 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <ol style="list-style-type: decimal"><li>The subject words/headings are divided up with the pipe ( | )
 character</li>
@@ -557,7 +557,7 @@ <h3 class="callout-title">Joining the Subjects column back together<a class="anc
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   <h4 class="accordion-header" id="headingSolution2">Show me the solution</h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <ol style="list-style-type: decimal"><li>The subject words/headings were previously delimited with the pipe (
 | ) character</li>
@@ -652,7 +652,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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   "dateCreated": "2018-04-12",
   "dateModified": "2024-02-09",
-  "datePublished": "2024-06-12"
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 }
 
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diff --git a/04-faceting-and-filtering.html b/04-faceting-and-filtering.html
index bb59cb35..6fbfe5fc 100644
--- a/04-faceting-and-filtering.html
+++ b/04-faceting-and-filtering.html
@@ -665,7 +665,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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   "dateCreated": "2018-04-12",
   "dateModified": "2023-11-28",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/05-clustering.html b/05-clustering.html
index 12d5c19d..d054ff81 100644
--- a/05-clustering.html
+++ b/05-clustering.html
@@ -486,7 +486,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
   "identifier": "https://librarycarpentry.github.io/lc-open-refine/05-clustering.html",
   "dateCreated": "2018-04-12",
   "dateModified": "2023-10-25",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
 }
 
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diff --git a/06-working-with-columns.html b/06-working-with-columns.html
index 105f4547..78c4ec6a 100644
--- a/06-working-with-columns.html
+++ b/06-working-with-columns.html
@@ -470,7 +470,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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   "dateCreated": "2018-04-12",
   "dateModified": "2024-01-11",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
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diff --git a/07-introduction-to-transformations.html b/07-introduction-to-transformations.html
index ac0f08a6..a8609b14 100644
--- a/07-introduction-to-transformations.html
+++ b/07-introduction-to-transformations.html
@@ -504,7 +504,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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   "dateCreated": "2018-04-12",
   "dateModified": "2023-05-01",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
 }
 
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diff --git a/08-writing-transformations.html b/08-writing-transformations.html
index ebb25e49..b783b4e9 100644
--- a/08-writing-transformations.html
+++ b/08-writing-transformations.html
@@ -492,7 +492,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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   "dateCreated": "2018-04-12",
   "dateModified": "2023-05-01",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
 }
 
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diff --git a/09-undo-and-redo.html b/09-undo-and-redo.html
index 3bc8ee5a..94baf664 100644
--- a/09-undo-and-redo.html
+++ b/09-undo-and-redo.html
@@ -470,7 +470,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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   "dateCreated": "2018-04-12",
   "dateModified": "2023-05-01",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/10-data-transformation.html b/10-data-transformation.html
index aed06f98..86263f78 100644
--- a/10-data-transformation.html
+++ b/10-data-transformation.html
@@ -608,7 +608,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
   "identifier": "https://librarycarpentry.github.io/lc-open-refine/10-data-transformation.html",
   "dateCreated": "2018-04-12",
   "dateModified": "2023-05-26",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
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diff --git a/11-using-arrays-transformations.html b/11-using-arrays-transformations.html
index 5892c41c..854c29fa 100644
--- a/11-using-arrays-transformations.html
+++ b/11-using-arrays-transformations.html
@@ -329,7 +329,7 @@ <h2 class="accordion-header" id="flush-headingTwelve">
       </div>
       <hr></nav><main id="main-content" class="main-content"><div class="container lesson-content">
         <h1>Transformations - Handling Arrays</h1>
-        <p>Last updated on 2024-06-12 |
+        <p>Last updated on 2024-06-13 |
         
         <a href="https://github.com/librarycarpentry/lc-open-refine/edit/main/episodes/11-using-arrays-transformations.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
         
@@ -450,12 +450,12 @@ <h3 class="card-title">Objectives</h3>
 bracket notation and number for position in sequence:</p>
 <pre><code><span><span class="fu">value.split</span><span class="op">(</span><span class="st">"|"</span><span class="op">)</span><span class="op">[</span><span class="fl">0</span><span class="op">]</span></span></code></pre>
 <p>would result in the string: “crystal structure”</p>
-<p>You can also join arrays together to make a ‘String’. The GREL
-expression would look like</p>
-<pre><code>value.split("|").uniques().join("|")</code></pre>
+<p>You can also sort and join arrays together to make a ‘String’. The
+GREL expression would look like</p>
+<pre><code>value.split("|").uniques().sort().join("|")</code></pre>
 <p>Taking the same example again, this would result in a string with the
-subjects in alphabetical order, listed with pipes between each
-subject.</p>
+subjects in alphabetical order (note that the sort function is
+case-sensitive), listed with pipes between each subject.</p>
 
 <div id="reverse-author-names" class="callout checklist">
 <div class="callout-square">
@@ -590,8 +590,8 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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   "identifier": "https://librarycarpentry.github.io/lc-open-refine/11-using-arrays-transformations.html",
   "dateCreated": "2018-04-12",
-  "dateModified": "2024-06-12",
-  "datePublished": "2024-06-12"
+  "dateModified": "2024-06-13",
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/12-export-transformation.html b/12-export-transformation.html
index 8e5840e4..c61240c5 100644
--- a/12-export-transformation.html
+++ b/12-export-transformation.html
@@ -461,7 +461,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
   "identifier": "https://librarycarpentry.github.io/lc-open-refine/12-export-transformation.html",
   "dateCreated": "2018-04-12",
   "dateModified": "2023-05-01",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/13-looking-up-data.html b/13-looking-up-data.html
index c6dd5d0f..9953df48 100644
--- a/13-looking-up-data.html
+++ b/13-looking-up-data.html
@@ -730,7 +730,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
   "identifier": "https://librarycarpentry.github.io/lc-open-refine/13-looking-up-data.html",
   "dateCreated": "2018-04-12",
   "dateModified": "2024-05-08",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/404.html b/404.html
index 8c9f9ac5..f244a106 100644
--- a/404.html
+++ b/404.html
@@ -391,8 +391,8 @@ <h1>Page not found</h1>
   "url": "https://librarycarpentry.github.io/lc-open-refine/404.html",
   "identifier": "https://librarycarpentry.github.io/lc-open-refine/404.html",
   "dateCreated": "2018-04-12",
-  "dateModified": "2024-06-12",
-  "datePublished": "2024-06-12"
+  "dateModified": "2024-06-13",
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/CODE_OF_CONDUCT.html b/CODE_OF_CONDUCT.html
index 7420df2e..bf1509d3 100644
--- a/CODE_OF_CONDUCT.html
+++ b/CODE_OF_CONDUCT.html
@@ -397,7 +397,7 @@ <h1>Contributor Code of Conduct</h1>
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   "dateCreated": "2018-04-12",
   "dateModified": "2023-05-01",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/LICENSE.html b/LICENSE.html
index c8ea38ea..7adbae66 100644
--- a/LICENSE.html
+++ b/LICENSE.html
@@ -448,7 +448,7 @@ <h1>Licenses</h1>
   "identifier": "https://librarycarpentry.github.io/lc-open-refine/LICENSE.html",
   "dateCreated": "2018-04-12",
   "dateModified": "2023-05-01",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/aio.html b/aio.html
index 88365cc9..73a5ccf4 100644
--- a/aio.html
+++ b/aio.html
@@ -1058,7 +1058,7 @@ <h3 class="callout-title">Splitting Subjects into separate cells<a class="anchor
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 </button>
-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <ol style="list-style-type: decimal">
 <li>The subject words/headings are divided up with the pipe ( | )
@@ -1093,7 +1093,7 @@ <h3 class="callout-title">Joining the Subjects column back together<a class="anc
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   <h4 class="accordion-header" id="headingSolution2">Show me the solution</h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
 <ol style="list-style-type: decimal">
 <li>The subject words/headings were previously delimited with the pipe (
@@ -2248,7 +2248,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
 </div>
 </section></section><section id="aio-11-using-arrays-transformations"><p>Content from <a href="11-using-arrays-transformations.html">Transformations - Handling Arrays</a></p>
 <hr>
-<p>Last updated on 2024-06-12 |
+<p>Last updated on 2024-06-13 |
         
         <a href="https://github.com/librarycarpentry/lc-open-refine/edit/main/episodes/11-using-arrays-transformations.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
 <div class="text-end">
@@ -2373,12 +2373,12 @@ <h3 class="card-title">Objectives</h3>
 bracket notation and number for position in sequence:</p>
 <pre><code><span><span class="fu">value.split</span><span class="op">(</span><span class="st">"|"</span><span class="op">)</span><span class="op">[</span><span class="fl">0</span><span class="op">]</span></span></code></pre>
 <p>would result in the string: “crystal structure”</p>
-<p>You can also join arrays together to make a ‘String’. The GREL
-expression would look like</p>
-<pre><code>value.split("|").uniques().join("|")</code></pre>
+<p>You can also sort and join arrays together to make a ‘String’. The
+GREL expression would look like</p>
+<pre><code>value.split("|").uniques().sort().join("|")</code></pre>
 <p>Taking the same example again, this would result in a string with the
-subjects in alphabetical order, listed with pipes between each
-subject.</p>
+subjects in alphabetical order (note that the sort function is
+case-sensitive), listed with pipes between each subject.</p>
 
 <div id="reverse-author-names" class="callout checklist">
 <div class="callout-square">
@@ -2963,8 +2963,8 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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   "dateCreated": "2018-04-12",
-  "dateModified": "2024-06-12",
-  "datePublished": "2024-06-12"
+  "dateModified": "2024-06-13",
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/discuss.html b/discuss.html
index 2d76cd46..7a8422ed 100644
--- a/discuss.html
+++ b/discuss.html
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   "dateCreated": "2018-04-12",
   "dateModified": "2023-10-20",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/images.html b/images.html
index 09b4198b..43e5a183 100644
--- a/images.html
+++ b/images.html
@@ -466,8 +466,8 @@ <h3 id="13-looking-up-data-figure-1">Figure 1</h3>
   "url": "https://librarycarpentry.github.io/lc-open-refine/images.html",
   "identifier": "https://librarycarpentry.github.io/lc-open-refine/images.html",
   "dateCreated": "2018-04-12",
-  "dateModified": "2024-06-12",
-  "datePublished": "2024-06-12"
+  "dateModified": "2024-06-13",
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/index.html b/index.html
index f74bd691..45a9afeb 100644
--- a/index.html
+++ b/index.html
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   "identifier": "https://librarycarpentry.github.io/lc-open-refine/index.html",
   "dateCreated": "2018-04-12",
-  "dateModified": "2024-06-12",
-  "datePublished": "2024-06-12"
+  "dateModified": "2024-06-13",
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/instructor-notes.html b/instructor-notes.html
index b0a4aa61..1464ecd9 100644
--- a/instructor-notes.html
+++ b/instructor-notes.html
@@ -514,8 +514,8 @@ <h2 id="powerful-transformations">Powerful transformations<a class="anchor" aria
   "url": "https://librarycarpentry.github.io/lc-open-refine/instructor-notes.html",
   "identifier": "https://librarycarpentry.github.io/lc-open-refine/instructor-notes.html",
   "dateCreated": "2018-04-12",
-  "dateModified": "2024-06-12",
-  "datePublished": "2024-06-12"
+  "dateModified": "2024-06-13",
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/instructor/01-introduction.html b/instructor/01-introduction.html
index 52948975..727503de 100644
--- a/instructor/01-introduction.html
+++ b/instructor/01-introduction.html
@@ -575,7 +575,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
   "identifier": "https://librarycarpentry.github.io/lc-open-refine/instructor/01-introduction.html",
   "dateCreated": "2018-04-12",
   "dateModified": "2023-05-01",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/instructor/02-importing-data.html b/instructor/02-importing-data.html
index 7c9d3ae3..09ea1985 100644
--- a/instructor/02-importing-data.html
+++ b/instructor/02-importing-data.html
@@ -452,7 +452,7 @@ <h3 class="callout-title">Create your first OpenRefine project (using
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 <div class="note-square"><i aria-hidden="true" class="callout-icon" data-feather="edit-2"></i></div>Instructor Note</h3>
 </button>
-<div id="collapseInstructor1" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor1" aria-labelledby="headingInstructor1">
+<div id="collapseInstructor1" class="accordion-collapse collapse" aria-labelledby="headingInstructor1" data-bs-parent="#accordionInstructor1">
 <div class="accordion-body">
 <p>This is a good moment to review the points from <a href="01-introduction.html#what-should-i-know-when-working-with-openrefine">What
 Should I Know When Working with OpenRefine?</a></p>
@@ -485,7 +485,7 @@ <h3 id="going-further">Going Further<a class="anchor" aria-label="anchor" href="
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 </button>
-<div id="collapseInstructor2" class="accordion-collapse collapse" data-bs-parent="#accordionInstructor2" aria-labelledby="headingInstructor2">
+<div id="collapseInstructor2" class="accordion-collapse collapse" aria-labelledby="headingInstructor2" data-bs-parent="#accordionInstructor2">
 <div class="accordion-body">
 <p>Carefully guide learners on how to revisit OpenRefine’s homepage to
 explore import options when creating new or re-opening existing
@@ -574,7 +574,7 @@ <h3 class="callout-title">Key Points<a class="anchor" aria-label="anchor" href="
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   "dateCreated": "2018-04-12",
   "dateModified": "2023-11-16",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/instructor/03-working-with-data.html b/instructor/03-working-with-data.html
index c28c96c9..d4cbf8d6 100644
--- a/instructor/03-working-with-data.html
+++ b/instructor/03-working-with-data.html
@@ -530,7 +530,7 @@ <h3 class="callout-title">Splitting Subjects into separate cells<a class="anchor
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   <h4 class="accordion-header" id="headingSolution1">Show me the solution</h4>
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-<div id="collapseSolution1" class="accordion-collapse collapse" aria-labelledby="headingSolution1" data-bs-parent="#accordionSolution1">
+<div id="collapseSolution1" class="accordion-collapse collapse" data-bs-parent="#accordionSolution1" aria-labelledby="headingSolution1">
 <div class="accordion-body">
 <ol style="list-style-type: decimal"><li>The subject words/headings are divided up with the pipe ( | )
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@@ -559,7 +559,7 @@ <h3 class="callout-title">Joining the Subjects column back together<a class="anc
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   <h4 class="accordion-header" id="headingSolution2">Show me the solution</h4>
 </button>
-<div id="collapseSolution2" class="accordion-collapse collapse" aria-labelledby="headingSolution2" data-bs-parent="#accordionSolution2">
+<div id="collapseSolution2" class="accordion-collapse collapse" data-bs-parent="#accordionSolution2" aria-labelledby="headingSolution2">
 <div class="accordion-body">
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-        <p>Last updated on 2024-06-12 |
+        <p>Last updated on 2024-06-13 |
         
         <a href="https://github.com/librarycarpentry/lc-open-refine/edit/main/episodes/11-using-arrays-transformations.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
         
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 <p>Taking the same example again, this would result in a string with the
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         <a href="https://github.com/librarycarpentry/lc-open-refine/edit/main/episodes/11-using-arrays-transformations.md" class="external-link">Edit this page <i aria-hidden="true" data-feather="edit"></i></a></p>
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-<p>You can also join arrays together to make a ‘String’. The GREL
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-<pre><code>value.split("|").uniques().join("|")</code></pre>
+<p>You can also sort and join arrays together to make a ‘String’. The
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 <p>Taking the same example again, this would result in a string with the
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index 7c7a3835..1b781573 100644
--- a/pkgdown.yml
+++ b/pkgdown.yml
@@ -2,5 +2,5 @@ pandoc: 3.1.11
 pkgdown: 2.0.9
 pkgdown_sha: ~
 articles: {}
-last_built: 2024-06-12T14:58Z
+last_built: 2024-06-13T13:03Z
 
diff --git a/profiles.html b/profiles.html
index a32109a7..29c6183e 100644
--- a/profiles.html
+++ b/profiles.html
@@ -348,8 +348,8 @@ <h1>Learner Profiles</h1>
   "url": "https://librarycarpentry.github.io/lc-open-refine/profiles.html",
   "identifier": "https://librarycarpentry.github.io/lc-open-refine/profiles.html",
   "dateCreated": "2018-04-12",
-  "dateModified": "2024-06-12",
-  "datePublished": "2024-06-12"
+  "dateModified": "2024-06-13",
+  "datePublished": "2024-06-13"
 }
 
   </script><script>
diff --git a/reference.html b/reference.html
index 921b8c33..89c2cc64 100644
--- a/reference.html
+++ b/reference.html
@@ -390,7 +390,7 @@ <h1>Reference</h1>
   "identifier": "https://librarycarpentry.github.io/lc-open-refine/reference.html",
   "dateCreated": "2018-04-12",
   "dateModified": "2023-05-01",
-  "datePublished": "2024-06-12"
+  "datePublished": "2024-06-13"
 }
 
   </script><script>