title: Delete elements from array if they contain some string
body: <p>Lets say I have an array with following data:</p>
  
  <pre><code>@array[0] = "hello this is a text"
  @array[1] = "this is a cat" 
  @array[2] = "this is a dog"
  @array[3] = "this is a person"
  @array[4] = "this is a computer"
  @array[5] = "this is a code"
  @array[6] = "this is an array"
  @array[7] = "this is an element"
  @array[8] = "this is a number"
  </code></pre>
  
  <p>I want to have a loop where it goes through all the array elements and finds out if any of the elements have the value "dog" in them if the element does have dog, then delete the element. and so results would be :</p>
  
  <pre><code>@array[0] = "hello this is a text"
  @array[1] = "this is a cat" 
  @array[2] = "this is a person"
  @array[3] = "this is a computer"
  @array[4] = "this is a code"
  @array[5] = "this is an array"
  @array[6] = "this is an element"
  @array[7] = "this is a number"
  </code></pre>