code: function find(array, exp) {
    return (isArray(array) && isDefined(exp))
      //return the member and not an array like `first`
      ? findInArray(array, $parse(exp), false)
      : array;
  }
docs: @name find
  @kind function
  
  @description
  Iterate over the given array and return the first member that the expression
  returns truthy for,