问一道 JS 算法题~

问一道 JS 算法题~
0

最近在做 FCC 初级算法题,感觉还是有点难度的,比如这道:https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/record-collection/

// Setup
var collection = {
    "2548": {
      "album": "Slippery When Wet",
      "artist": "Bon Jovi",
      "tracks": [ 
        "Let It Rock", 
        "You Give Love a Bad Name" 
      ]
    },
    "2468": {
      "album": "1999",
      "artist": "Prince",
      "tracks": [ 
        "1999", 
        "Little Red Corvette" 
      ]
    },
    "1245": {
      "artist": "Robert Palmer",
      "tracks": [ ]
    },
    "5439": {
      "album": "ABBA Gold"
    }
};
// Keep a copy of the collection for tests
var collectionCopy = JSON.parse(JSON.stringify(collection));

// Only change code below this line
function updateRecords(id, prop, value) {

if (value == "") {
  delete collection[id][prop];
}
else if (prop != "tracks" && value != "") {
  collection[id][prop] = value;

}
else if (prop == "tracks" && value != "") {
  collection[id][prop].push(value);
}
else if (prop == "tracks" && !collection[id].hasOwnProperty("tracks")) {
  collection[id].tracks = [];
  collection[id].tracks.push(value);
 
}
  
  return collection;
}

// Alter values below to test your code
updateRecords(5439, "artist", "ABBA");

不知道啥情况,过不了。。。

最后的两个else if 顺序颠倒下,因为你现在最后一个else if实际比倒数第二个更加特化,需要优先排除

2赞

嗯是滴,我后来也看了这个 https://guide.freecodecamp.org/certifications/javascript-algorithms-and-data-structures/basic-javascript/record-collection/

谢谢哈