title: Find null attribute with lodash
body: <p>I have an object and I need to to check if an attribute is null, but always get undefined.</p>
  
  <pre><code> var obj={
    "EMPRESA": "CMIP",
    "CD_DIRECAO": "01",
    "DT_INI_DIRECAO": "1900-01-01",
    "CD_DEPT": "10",
    "DT_INI_DEPT": "1900-01-01",
    "CD_PROC": "1",
    "DT_INI_PROC": "1900-01-01",
    "DSP_PROC": "Processo 1",
    "DSR_PROC": "Processo 1",
    "DESCRICAO": null,
    "ID_PROCESSO_ARTIGO": null,
    "VALIDACAO_ARTIGO": null,
    "DT_FIM": null,
    "DT_RowId": "row_CMIP011900-01-01101900-01-0111900-01-01",
    "DESIGEMPRESA": "CMIP",
    "DSP_DIRECAO": "Disponivel",
    "DSP_DEPT": "ADM - Administracao"
  };
  console.log(_.find(obj,{'DT_FIM':null}));
  </code></pre>
  
  <p>I've setup a fiddle <a href="https://jsfiddle.net/0a6yf34b/1/" rel="nofollow noreferrer">https://jsfiddle.net/0a6yf34b/1/</a></p>