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37 lines
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2.6 KiB
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<!doctype html>
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<title>Reflect.set — Ludic</title>
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<meta name="description" content="Write one field of an entity by (prop, field) id.">
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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-reflect.html">Reflect</a> <span>›</span> <span class="here">Reflect.set</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">Reflect.set</h1>
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</div>
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<code class="sig">Reflect.set(entity, prop, field, value)</code>
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<div class="desc"><p>Writes <code>value</code> into field <code>field</code> of property <code>prop</code> on <code>entity</code>. For a <code>fixed</code> field, pass the raw Q16.16 bits. This is how a generic loader restores saved state and how a debug overlay applies an edit. Same as <a href="world-set"><code>World.set</code></a>, under the reflection namespace.</p></div>
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<div class="params"><h2>Parameters</h2><div class="param" id="param-entity"><code class="pname">entity</code><span class="pdesc">the entity to modify</span></div><div class="param" id="param-prop"><code class="pname">prop</code><span class="pdesc">a property id (from <a href="reflect-prop"><code>Reflect.prop</code></a>)</span></div><div class="param" id="param-field"><code class="pname">field</code><span class="pdesc">a field id (from <a href="reflect-field"><code>Reflect.field</code></a>)</span></div><div class="param" id="param-value"><code class="pname">value</code><span class="pdesc">the integer value to store</span></div></div>
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<div class="examples"><h2>Example</h2><pre data-lang="ludic">program Demo {
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property Health { hp: int = 0 }
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model Unit { Health }
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entry {
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spawn Unit { Health { hp: 7 } }
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let H = Reflect.prop("Health")
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Reflect.set(0, H, Reflect.field(H, "hp"), 99)
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print(Reflect.get(0, H, 0)) # 99
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}
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}</pre></div>
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