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+<title>Uuid.is_valid — Ludic</title>
+<meta name="description" content="Is s a well-formed UUID string?">
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+  <div class="crumbs"><a href="api.html">API Reference</a> <span>›</span> <a href="ns-uuid.html">Uuid</a> <span>›</span> <span class="here">Uuid.is_valid</span></div>
+  <div class="item-head">
+    <span class="kind-badge kind-method">method</span>
+    <h1 id="top">Uuid.is_valid</h1>
+  </div>
+  <code class="sig">Uuid.is_valid(s) -&gt; bool</code>
+  <div class="desc"><p>Reports whether <code>s</code> is a well-formed UUID: exactly 36 characters, hyphens at positions 8, 13, 18 and 23, and hexadecimal digits (either case) everywhere else. This is the guard to run on any UUID that came from outside your program — a save file, a network message, a mod, a command-line flag — before you trust it as an identity.</p><p>It checks *shape*, not version: both v4 and v7 IDs (and any other conforming UUID) pass. To also fold a malformed value into a safe default in one step, use <a href="uuid-parse"><code>Uuid.parse</code></a> instead.</p></div>
+  <div class="params"><h2>Parameters</h2><div class="param" id="param-s"><code class="pname">s</code><span class="pdesc">the string to check</span></div></div>
+  <div class="examples"><h2>Example</h2><pre data-lang="ludic">program Valid {
+  entry {
+    if Uuid.is_valid("550e8400-e29b-41d4-a716-446655440000") { print(1) }
+    if not Uuid.is_valid("not-a-uuid") { print(2) }
+  }
+}</pre></div>
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