title: How to split string in correct way?
body: <p>For example, I have this string:</p>
  <p><code>a = &quot;Hello, @USER_ID:1@, how are you?&quot;</code></p>
  <p>I need to turn this string into array of words:</p>
  <p><code>[&quot;Hello, &quot;, &quot;@USER_ID:1@&quot;, &quot;, how are you?&quot;]</code></p>
  <p>I've tried this piece of code:</p>
  <p><code>a.split(/\@USER_ID:([0-9]+)\@/)</code></p>
  <p>But it returns this:</p>
  <p><code> [&quot;Hello, &quot;, &quot;1&quot;, &quot;, how are you?&quot;] </code></p>
  <p>What is the proper way to split this string?</p>