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35 lines
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2.2 KiB
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<title>Hash.of64 — Ludic</title>
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<meta name="description" content="The fast default 64-bit string hash.">
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<header class="nav"><div class="wrap nav-in"><a class="brand" href="index.html"><span class="logo">L</span> Ludic</a><button class="nav-toggle" aria-label="Toggle menu" aria-expanded="false">☰</button><nav class="nav-links"><a href="index.html">Home</a><a href="api.html">API Reference</a><a class="nav-cta" href="https://git.workshopsoft.io/workshopsoft/ludic">Source ↗</a></nav></div></header>
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<div class="crumbs"><a href="api.html">API Reference</a> <span>›</span> <a href="ns-hash.html">Hash</a> <span>›</span> <span class="here">Hash.of64</span></div>
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<div class="item-head">
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<span class="kind-badge kind-method">method</span>
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<h1 id="top">Hash.of64</h1>
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<code class="sig">Hash.of64(s) -> long</code>
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<div class="desc"><p>The 64-bit counterpart of <a href="hash-of"><code>Hash.of</code></a>: hashes a string to a <code>long</code> instead of a 32-bit <code>int</code>. Use it when you want far fewer collisions than 32 bits can give — large content-id spaces, asset registries, or network identifiers where two different strings sharing a hash would be a real risk. Currently it is <a href="hash-fnv1a_64"><code>Hash.fnv1a_64</code></a>, FNV-1a over the bytes. Deterministic like every hash here: the same string always gives the same 64-bit value.</p></div>
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<div class="params"><h2>Parameters</h2><div class="param" id="param-s"><code class="pname">s</code><span class="pdesc">the string to hash</span></div></div>
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<div class="examples"><h2>Example</h2><pre data-lang="ludic">program Ids64 {
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entry {
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let grass: long = Hash.of64("grass_tile")
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let water: long = Hash.of64("water_tile")
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print(grass)
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print(water)
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}
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}</pre></div>
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