docs/help/deduplicate_find.html


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  <title>BQN: Epsilon Underbar (`⍷`)</title>
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<h1 id="epsilon-underbar-"><a class="header" href="#epsilon-underbar-">Epsilon Underbar (<code><span class='Function'>⍷</span></code>)</a></h1>
<h2 id="--deduplicate"><a class="header" href="#--deduplicate"><code><span class='Function'>⍷</span> <span class='Value'>𝕩</span></code>: Deduplicate</a></h2>
<p>Unique major cells of <code><span class='Value'>𝕩</span></code>.</p>
<a class="replLink" title="Open in the REPL" target="_blank" href="https://mlochbaum.github.io/BQN/try.html#code=ICAg4o23IDTigL814oC/NuKAvzbigL804oC/N+KAvzUKCiAgIGEg4oaQIDPigL8zIOKliiDihpU2CgogICDijbcgYQ==">↗️</a><pre>       <span class='Function'>⍷</span> <span class='Number'>4</span><span class='Ligature'>‿</span><span class='Number'>5</span><span class='Ligature'>‿</span><span class='Number'>6</span><span class='Ligature'>‿</span><span class='Number'>6</span><span class='Ligature'>‿</span><span class='Number'>4</span><span class='Ligature'>‿</span><span class='Number'>7</span><span class='Ligature'>‿</span><span class='Number'>5</span>
⟨ 4 5 6 7 ⟩

       <span class='Value'>a</span> <span class='Gets'>←</span> <span class='Number'>3</span><span class='Ligature'>‿</span><span class='Number'>3</span> <span class='Function'>⥊</span> <span class='Function'>↕</span><span class='Number'>6</span>

       <span class='Function'>⍷</span> <span class='Value'>a</span>
┌─       
╵ 0 1 2  
  3 4 5  
        ┘
</pre>
<h2 id="---find"><a class="header" href="#---find"><code><span class='Value'>𝕨</span> <span class='Function'>⍷</span> <span class='Value'>𝕩</span></code>: Find</a></h2>
<p>Mark the top left location of the occurrences of <code><span class='Value'>𝕨</span></code> in <code><span class='Value'>𝕩</span></code> with a 1, and other locations with 0.</p>
<p>Result is the same shape as <code><span class='Paren'>(</span><span class='Function'>≢</span><span class='Value'>𝕨</span><span class='Paren'>)</span><span class='Function'>↕</span><span class='Value'>x</span></code>.</p>
<a class="replLink" title="Open in the REPL" target="_blank" href="https://mlochbaum.github.io/BQN/try.html#code=ICAgInN0cmluZyIg4o23ICJzdWJzdHJpbmciCgogICAibG9vb29vb25nIiDijbcgInNob3J0IgoKICAgYSDihpAgNyAoNHzii4bLnCnijJzil4vihpUgOQoKICAgYiDihpAgKDDigL8z4oC/MOKJjTDigL8x4oC/MCkKCiAgIGIg4o23IGE=">↗️</a><pre>       <span class='String'>&quot;string&quot;</span> <span class='Function'>⍷</span> <span class='String'>&quot;substring&quot;</span>
⟨ 0 0 0 1 ⟩

       <span class='String'>&quot;loooooong&quot;</span> <span class='Function'>⍷</span> <span class='String'>&quot;short&quot;</span>
⟨⟩

       <span class='Value'>a</span> <span class='Gets'>←</span> <span class='Number'>7</span> <span class='Paren'>(</span><span class='Number'>4</span><span class='Function'>|⋆</span><span class='Modifier'>˜</span><span class='Paren'>)</span><span class='Modifier'>⌜</span><span class='Modifier2'>○</span><span class='Function'>↕</span> <span class='Number'>9</span>
<span class='Error'>Error: Redefinition</span>

       <span class='Value'>b</span> <span class='Gets'>←</span> <span class='Paren'>(</span><span class='Number'>0</span><span class='Ligature'>‿</span><span class='Number'>3</span><span class='Ligature'>‿</span><span class='Number'>0</span><span class='Function'>≍</span><span class='Number'>0</span><span class='Ligature'>‿</span><span class='Number'>1</span><span class='Ligature'>‿</span><span class='Number'>0</span><span class='Paren'>)</span>

       <span class='Value'>b</span> <span class='Function'>⍷</span> <span class='Value'>a</span>
┌─   
╵ 0  
  0  
    ┘
</pre>