nodejs的样本问题模型

// Experimental Verb Generator

function randomSample(arr) {
	return arr[Math.floor(Math.random()*arr.length)];
}

function randKey(dict) {
	return randomSample(Objects.keys(dict));
}

var objMap = {
  "the ball":[
       "bounces",
       "moves",
       "jumps",
       "rolls"
    ]
};

function question(){
  return {
    "Q":"the ball ___.",
    "A":objMap["the ball"],
    check:function(ans){
      for(var i=0;i<objMap["the ball"].length;i++)
      {
        if(objMap["the ball"][i] === ans) return true;
      }
      return false;
    }
  };
}