Question

我有1300多个对象的数组。这些物品是牛仔裤，具有腰部，膝部，大腿和袖口等尺寸。

我想为这个数组中的每个对象添加4个新属性：

var getResults = function(){
    results = $.map(dbcontent,function(i){
        (i).riseProx = "0";
        (i).thighProx = "0";
        (i).kneeProx = "0";
        (i).cuffProx = "0";

当我运行它时，它表示riseProx未定义。我要做的是将这四个新属性添加到每个对象。请帮忙。非常感谢:)。

var getResults = function(){
results = $.map(dbcontent,function(i){
    //create counter for proximity
    (i).riseProx = 0;
    (i).thighProx = 0;
    (i).kneeProx = 0;
    (i).cuffProx = 0;
    //start iterating and adding to counter
    //check the rise
    if ((i).rise >= (psObject.rise-qInch) && (i).rise <= (psObject.rise+qInch)){
        riseProx+=3}
    else if ((i).rise >= (psObject.rise-hInch) && (i).rise <= (psObject.rise+hInch)){
        riseProx+=2}
    else if ((i).rise >= (psObject.rise-inch) && (i).rise <= (psObject.rise+inch)){
        riseProx++};
    //check the thigh
    if ((i).thigh >= (psObject.thigh-qInch) && (i).thigh <= (psObject.thigh+qInch)){
        thighProx+=3}
    else if ((i).thigh >= (psObject.thigh-hInch) && (i).thigh <= (psObject.thigh+hInch)){
        thighProx+=2}
    else if ((i).thigh >= (psObject.thigh-inch) && (i).thigh <= (psObject.thigh+inch)){
        thighProx++};
    //check the knee
    if ((i).knee >= (psObject.knee-qInch) && (i).knee <= (psObject.knee+qInch)){
        kneeProx+=3}
    else if ((i).knee >= (psObject.knee-hInch) && (i).knee <= (psObject.knee+hInch)){
        kneeProx+=2}
    else if ((i).knee >= (psObject.knee-inch) && (i).knee <= (psObject.knee+inch)){
        kneeProx++};
    //check the cuff
    if ((i).cuff >= (psObject.cuff-qInch) && (i).cuff <= (psObject.cuff+qInch)){
        cuffProx+=3}
    else if ((i).cuff >= (psObject.cuff-hInch) && (i).cuff <= (psObject.cuff+hInch)){
        cuffProx+=2}
    else if ((i).cuff >= (psObject.cuff-inch) && (i).cuff <= (psObject.cuff+inch)){
        cuffProx++};
    //create totalProx to evaluate total proximity or likeness in size
    i.totalProx = i.riseProx + i.thighProx + i.kneeProx + i.cuffProx;
    console.log(i.totalProx)
});

};

这是整个功能。我要做的是将psObject（选定的牛仔裤大小）与数据库中的每个牛仔裤进行比较，以确定哪条牛仔裤是最接近的匹配。我打算通过创建riseProx等属性并将它们增加1,2和3来实现，具体取决于匹配的接近程度。

Answer 1

我看不到从(i)函数返回$.map项。

另请参阅使用reduce的映射，如下所示：

var getResults = function(){
    return dbcontent.reduce(function(mapped, item){
       item.riseProx = "0";
        item.thighProx = "0";
        item.kneeProx = "0";
        item.cuffProx = "0"; 
        mapped.push(item);
       return mapped;
   }, []);
};

如何向对象数组添加新属性？我正在尝试使用$ .map

1 个答案: