function capitalize(string) {
      if (string == null) {
        return '';
      }
      string = String(string);
      return string.charAt(0).toUpperCase() + string.slice(1);
    }
Converts the first character of `string` to upper case.

@static
@memberOf _
@category Strings
@param {string} string The string to capitalize.
@returns {string} Returns the capitalized string.
@example

_.capitalize('fred');
// => 'Fred'