title: lodash unique based on attribute
body: <p>I have a array of objects such as</p>
  
  <pre><code>[{ "name": "Jen", "age":31, "eyecolor": "blue", "hair":"brown"}, 
   { "name": "Jen", "age":32, "eyecolor": "green", "hair":"blonde"}, 
   { "name": "Jules", "age":31, "eyecolor": "blue", "hair":"brown"}, ,
   { "name": "Brian", "age":40, "eyecolor": "blue", "hair":"brown"}]
  </code></pre>
  
  <p>I need a lodash expression that will result in a array of unique objects based on one property. For example, if I used name, it would give me these three:</p>
  
  <pre><code>[{ "name": "Jen", "age":31, "eyecolor": "blue", "hair":"brown"}, 
   { "name": "Jules", "age":31, "eyecolor": "blue", "hair":"brown"}, 
   { "name": "Brian", "age":40, "eyecolor": "blue", "hair":"brown"}]
  </code></pre>