title: case insensitive matching search in string array swift 3
body: <p>In Swift 3, I want to create an array of matching string (case insensitive) from string array:-</p>
  
  <p>I am using this code, but it is case sensitive, </p>
  
  <pre><code>let filteredArray = self.arrCountry.filter { $0.contains("india") }
  </code></pre>
  
  <p>how can I do this..
  suppose I have a master string array called arrCountry, I want to create other array of all the string who has "india"(case insensitive) in it. </p>
  
  <p>Can anyone help me out.</p>