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<title>class Rack::Config - rack-2.2.23 Documentation</title>

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  <h1 id="class-Rack::Config" class="class">
    class Rack::Config
  </h1>

<section class="description">
    
<p><a href="Config.html"><code>Rack::Config</code></a> modifies the environment using the block given during initialization.</p>

<p>Example:</p>

<pre class="ruby"><span class="ruby-identifier">use</span> <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Config</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">env</span><span class="ruby-operator">|</span>
  <span class="ruby-identifier">env</span>[<span class="ruby-string">&#39;my-key&#39;</span>] = <span class="ruby-string">&#39;some-value&#39;</span>
<span class="ruby-keyword">end</span>
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         <h3>Public Class Methods</h3>
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          <span class="method-name">new</span><span
            class="method-args">(app, &amp;block)</span>
          
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            <pre><span class="ruby-comment"># File lib/rack/config.rb, line 12</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">initialize</span>(<span class="ruby-identifier">app</span>, <span class="ruby-operator">&amp;</span><span class="ruby-identifier">block</span>)
  <span class="ruby-ivar">@app</span> = <span class="ruby-identifier">app</span>
  <span class="ruby-ivar">@block</span> = <span class="ruby-identifier">block</span>
<span class="ruby-keyword">end</span></pre>
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         <h3>Public Instance Methods</h3>
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          <span class="method-name">call</span><span
            class="method-args">(env)</span>
          
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            <pre><span class="ruby-comment"># File lib/rack/config.rb, line 17</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">call</span>(<span class="ruby-identifier">env</span>)
  <span class="ruby-ivar">@block</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
  <span class="ruby-ivar">@app</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-keyword">end</span></pre>
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