如何判断一个对象的键名内是否含有某个值

var obj = {  
  "apple_pie": "delicious",  
  "banana_bread": "tasty",  
  "cherry_tart": "sweet"  
};  
  
var searchForValue = "apple";  
  
var keys = Object.keys(obj);  
var containsValue = false;  
  
for (var i = 0; i < keys.length; i++) {  
  if (keys[i].includes(searchForValue)) {  
    containsValue = true;  
    break;  
  }  
}  
  
if (containsValue) {  
  console.log("键名中包含值: " + searchForValue);  
} else {  
  console.log("键名中不包含值: " + searchForValue);  
}