title: Convert an integer array to string array in Julia
body: <p>Is there a way to convert an array of integers (or any numbers) to an array of strings in Julia? Essentially, I want to convert <code>[1 2 3 4]</code> to <code>["1" "2" "3" "4"]</code>.</p>
  
  <p>Stuff that doesn't work:</p>
  
  <pre><code>numbers = [1 2 3 4];
  strings = ["1" "2" "3" "4"];
  string(numbers)
  convert(Array{String}, numbers)
  </code></pre>
  
  <p>Output:</p>
  
  <pre><code>"[1 2 3 4]"
  ERROR: MethodError: Cannot `convert` an object of type Int64 to an object of type String
  ...
  </code></pre>
  
  <p>I'm using Juila 1.3.1</p>