title: how to remove backslash from a string containing an array in ruby
body: <p>I have a string like this</p>
  
  <pre><code>a="[\"6000208900\",\"600020890225\",\"600900231930\"]"
  #expected result [6000208900,600020890225,600900231930]
  </code></pre>
  
  <p>I am trying to remove the backslash from the string.</p>
  
  <pre><code>a.gsub!(/^\"|\"?$/, '')
  </code></pre>