如何存储对象数组？ [英] How do I store an array of objects?

问题描述

我有一个对象图像我可以执行 image.top 之类的操作，它会返回一个值，或者我可以 image.myPoints [0] .left ，它会返回一个值。我基本上有这个图像对象为我存储值。我希望能够在一个数组中放置多个 image 对象，这样我就可以这样做：

I have an object image I can do things like image.top and it will return a value, or I can do image.myPoints[0].left and it will return a value. I basically have this image object that stores values for me. I want to be able to put multiple image objects in an array so i could do something like this:

$("#toPinpoint").mapImage({
                useAjax: false,
                pinpoints: [ { "top": 50,
                           "left": 280,
                           "width": 200,
                           "height": 200},
                         { "top": 0,
                           "left": 0,
                           "width": 300,
                           "height": 74 } ] 
            });

我使用此函数创建对象，将针点添加到对象上。当调用mapImage函数时，会发生这种情况：

I use this function to create the object, the pinpoints get added on to the object. When the mapImage function is called this is what happens:

    $.fn.mapImage = function(options){



    //Set user input options and defaults
    var optionConfig = $.extend({}, $.fn.mapImage.defaults, options);

    image=this;
    this.image = this;

    // Assign defaults
    this.previewMode = optionConfig.previewMode;
    this.pinpoints = optionConfig.pinpoints;
    image.pinpoints = optionConfig.pinpoints;
    image.pinpointCount = 0;
    image.selected = 0;
    ...}

这设置图像属性，现在我想修改特性使用我的应用程序然后将这些图像对象保存到数组中。

This sets the image properties and now I want to modify the properities with my application then SAVE these image objects into an array.

我的问题是数组正在加载使用图像对象，但它似乎用我刚刚推入的对象填充整个数组，因此它不会保存我的旧图像对象。例如，如果我执行 myArray [0] .myPoints [0] .left ，让我们说它重新打造30，然后我推送另一个具有myPoints [0]的图像对象.left等于20，我在阵列中的第一个图像对象变成20而不是保存为30.如果这是一个解决这个问题的好方法，我将不胜感激。谢谢！

My problem with this is that the array is loading up with image objects, but it seems to fill the whole array with the object i just pushed in, so it doesnt save my old image objects. For example, if i do myArray[0].myPoints[0].left , lets say it retruns 30, and then i push another image object that has myPoints[0].left equal to 20, the first image object I have in the array turns into 20 instead of saving it as 30. If theres a good way of solving this issue it would be greatly appreciated. Thank you!

推荐答案

使用 array.push（x）应该添加 x 到数组的末尾。但是，它不会创建 x 的副本，因此如果您更改 x 和<$ c的属性$ c> push（）它再一次，你的数组将包含两个带有更新属性的 x 实例 - 我怀疑这就是你所看到的。 （也就是说，您可能正在更改图像的顶部属性和 push（） 再次使用它，而不是创建一个全新的图像到 push（））。

Using array.push(x) should add x to the end of array. However, it will not create a copy of x, so if you then change an attribute of x and push() it again, your array will contain two instances of x with the updated attribute - I suspect this is what you are seeing. (That is, you may be changing the top property of your image and push()ing it again, instead of creating a whole new image to push()).

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