Question

我建立了处理网页的原型,我成功地增加了(粉碎),但能够获取数据,我失败:

var foundImageIndex = Pages.indexFirst(function (item) { if (item.PageID == PageID) return true; });

The javascript pagehandler:

var Pages = new Array();

PageContainer = function () //constructor for the proxy
{
   // this._baseURL = url;
};

PageContainer.prototype =
{

    AddPage: function (data) {
        if (data == null) return;
        Pages.push({ PageID: data.PageID, SegmentID: data.SegmentID });
    },

    GetPage: function (PageID) {
        alert( getPage( +PageID+ )=  + JSON.stringify(Pages));

        var foundImageIndex = Pages.indexFirst(function (item) { if (item.PageID == PageID) return true; });

        var dt = { PageID: Pages[foundImageIndex].PageID, SegmentID: Pages[foundImageIndex].SegmentID };
        return dt;
    }


};

我呼吁其他各位:

var gPageContainer = new PageContainer();

 for (var i = 0; i < SegStruct.SegmentsCount; i++) {
                var segRClass = //get from webservice
                gPageContainer.AddPage({ PageID: i, SegmentID: segRClass.SegmentID });

            }

I trying to call: gPageContainer.GetPage(1); but it failed in GetPage: function (PageID) it returns -1 in: var foundImageIndex = Pages.indexFirst(function (item) { if (item.PageID == PageID) return true; });

发现图Index一贯-1

为什么?

Answer 1

在施工人员面前添加以下内容:

if (typeof Array.prototype.indexFirst ==  undefined ) {
    Array.prototype.indexFirst = function (validator) {
        for (var i = 0; i <= this.length - 1; i++) {
            if (validator(this[i])) {
                return i;
            }
        }
        return -1;
    };
}

友情链接