0

我正在开发一个程序，并希望对 Javascript 的区别有一点了解。在我的程序中，我有一个黑名单数组，其中包含不允许出现在最终结果中的值，如下所示：

blacklist = ["One", "Two", "Four"]
someArr = ["One", "Three", "Five", "Two", "One"]
//Desired result = ["Three", "Five"]

我从另一个 Stack 问题中找到了一个很棒的提示（代码如下所示）。

Array.prototype.diff = function(a) {
    return this.filter(function(i) {return !(a.indexOf(i) > -1);});
};

////////////////////  
// Examples  
////////////////////

[1,2,3,4,5,6].diff( [3,4,5] );  
// => [1, 2, 6]

["test1","test2","test3","test4","test5","test6"].diff(["test1","test2","test3","test4"]);  
// => ["test5", "test6"]

问题是我需要将字符串数组与 3 维数组中的特定键进行比较。这是我的结构：

Array1 = [collab1: "Name, Someone's",
          collab2: "Else, Somebody",
          ...: ...],

         [collab1: "Else, Somebody",
          collab2: "Thornton, Billy Bob",
          ...: ...];

Array2 = ["Name, Someone's", "Else, Somebody", "Thornton, Billy Bob"]

我想使用 diff 类对照 Array2 检查每个索引的 collab1。这可能吗？

4

1 回答 1

1

Solution to compare any 2 objects:

var
array_tools = {};
array_tools.filter = function(Arr,fun){
    if(typeof Array.prototype.filter === 'undefined'){ // Допиливание функциональности массивов для IE
        //filter = function( fun  ){ // , thisp
          var len = Arr.length;
          if(typeof fun != "function") throw new TypeError();

          var res = [], thisp = arguments[1];

          for(var i=0;i<len;i++){
                if(i in Arr){
                  var val = Arr[i]; // in case fun mutates this
                  if(fun.call(thisp, val, i, Arr)) res.push(val);
                }
          }

          return res;

    }
    else{
        return Arr.filter(fun);
    }
};

var compare_objects = function( firstObj, secondObject ){
    var get_keys = function(O){
        var A = [];
        for(var key in O) A.push(key);
        return A;
    },
    keysFirstObj     = get_keys(firstObj),
    keysSecondObject = get_keys(secondObject);

    if( keysFirstObj.length != keysSecondObject.length ){
        return false;
    }

    return !array_tools.filter( keysFirstObj, function(key){
        if( typeof firstObj[key] == "object" || $.isArray(firstObj[key]) ){
            return !compare_objects(firstObj[key], secondObject[key]);
        }
        else{
            return firstObj[key] !== secondObject[key];
        }
    } ).length;
}

To compare 2 objects: compare_objects(Obj1, Obj2). If this will be true - they are equal.

ADDITION $.isArray is from jQuery. If you don't need jQuery - open it's full source and copy only this tool.

于 2012-07-31T14:13:29.680 回答