Regexp.html

---
title: Regexp
layout: default
---
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            <span>Ruby on Rails 8.0.0</span><br />
        
        <div class="type">Class</div>
        <h1>
            Regexp
            
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                    <a href="Object.html">Object</a>
                    
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        <ul class="files">
            
            <li><a href="../files/activesupport/lib/active_support/core_ext/object/json_rb.html">activesupport/lib/active_support/core_ext/object/json.rb</a></li>
            
            <li><a href="../files/activesupport/lib/active_support/core_ext/regexp_rb.html">activesupport/lib/active_support/core_ext/regexp.rb</a></li>
            
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    <h2 id="methods">Methods</h2>
    <ul>
      
        <li>
          <a href="#method-i-multiline-3F">multiline?</a>
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    <!-- Methods -->
    
    
      <h2 id="instance-public-methods">Instance Public methods</h2>
      
        <div class="method">
          <h3 id="method-i-multiline-3F">
            
              multiline?()
            
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            <div class="description">
              <p>Returns <code>true</code> if the regexp has the multiline flag set.</p>

<pre><code>(/./).multiline?  # =&gt; false
(/./m).multiline? # =&gt; true

Regexp.new(&quot;.&quot;).multiline?                    # =&gt; false
Regexp.new(&quot;.&quot;, Regexp::MULTILINE).multiline? # =&gt; true
</code></pre>
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            <details class="method__source">
              <summary>
                <span class="label">📝 Source code</span>
              </summary>

              <pre><code class="ruby"># File activesupport/lib/active_support/core_ext/regexp.rb, line 11
  def multiline?
    options &amp; MULTILINE == MULTILINE
  end</code></pre>
              
                <a href="https://github.com/rails/rails/blob/dd8f7185faeca6ee968a6e9367f6d8601a83b8db/activesupport/lib/active_support/core_ext/regexp.rb#L11" target="_blank" class="github_url">🔎 See on GitHub</a>
              
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