src/filter-prompts.js
function filterPrompts( PromptAnswers, generator_prompts ) {
  return filter(
    generator_prompts,
    function iteratee( prompt ) {
      return typeof PromptAnswers.get( prompt.name ) === 'undefined';
    }
  );
}
function filterPrompts( PromptAnswers, generator_prompts ) {
  return filter(
    generator_prompts,
    function iteratee( prompt ) {
      return typeof PromptAnswers.get( prompt.name ) === 'undefined';
    }
  );
}
function filterPrompts ( PromptAnswers , generator_prompts ) { return filter ( generator_prompts , function iteratee ( prompt ) { return typeof PromptAnswers . get ( prompt . name ) === 'undefined' ; } ) ; }
if a prompt.name already exists in PromptAnswers.answers that prompt will not be returned in
the resulting Array

@param {PromptAnswers} PromptAnswers
@param {Array} generator_prompts
@returns {Array}
if a prompt . name already exists in PromptAnswers . answers that prompt will not be returned in the resulting Array