title: Create a Dictionary from Arrays of Keys and Values
body: <p>I have:</p>
  
  <pre><code>keys = ["a", "b", "j"]
  vals = [1, 42, 9]
  </code></pre>
  
  <p>and I want something like:</p>
  
  <pre><code>somedic = ["a"=&gt;1, "b"=&gt;42, "j"=&gt;9]
  </code></pre>
  
  <p>i.e.</p>
  
  <pre><code>Dict{String,Int64} with 3 entries:
  "j" =&gt; 9
  "b" =&gt; 42
  "a" =&gt; 1
  </code></pre>
  
  <p>But how??</p>