Question

我正在尝试使用YUI来显示表格。使用以下示例

YAHOO.example.Data = {
        bookorders: [
            {id:"po-0167", date:new Date(1980, 2, 24), quantity:1, amount:4, title:"A Book About Nothing"},
            {id:"po-0783", date:new Date("January 3, 1983"), quantity:null, amount:12.12345, title:"The Meaning of Life"},
            {id:"po-0297", date:new Date(1978, 11, 12), quantity:12, amount:1.25, title:"This Book Was Meant to Be Read Aloud"},
            {id:"po-1482", date:new Date("March 11, 1985"), quantity:6, amount:3.5, title:"Read Me Twice"}
        ]
    }

    YAHOO.example.Basic = function() {
        var myColumnDefs = [
            {key:"id", sortable:true, resizeable:true},
            {key:"date", formatter:YAHOO.widget.DataTable.formatDate, sortable:true, sortOptions:{defaultDir:YAHOO.widget.DataTable.CLASS_DESC},resizeable:true},
            {key:"quantity", formatter:YAHOO.widget.DataTable.formatNumber, sortable:true, resizeable:true},
            {key:"amount", formatter:YAHOO.widget.DataTable.formatCurrency, sortable:true, resizeable:true},
            {key:"title", sortable:true, resizeable:true}
        ];

        var myDataSource = new YAHOO.util.DataSource(YAHOO.example.Data.bookorders);
        myDataSource.responseType = YAHOO.util.DataSource.TYPE_JSARRAY;
        myDataSource.responseSchema = {
            fields: ["id","date","quantity","amount","title"]
        };

        var myDataTable = new YAHOO.widget.DataTable("basic",
                myColumnDefs, myDataSource, {caption:"DataTable Caption"});

        return {
            oDS: myDataSource,
            oDT: myDataTable
        };
    }();

但是我没有使用预订者Data，而是使用esri.tasks.QueryTask从数据库中查询结果

所以我必须遍历数据，我必须填写bookorders json数组。

for (var i=0, il=results_books.features.length; i<il; i++) {
     var featureAttributes = results_books.features[i].attributes;
         var string = " id : \"" + results_books.features[i].attributes[0] + "\",";
         var string = string + " date : \"" + results_books.features[i].attributes[1] + "\",";
         var string = string + " quantity: \"" + results_books.features[i].attributes[2] + "\",";
         var string = string + " amount: \"" + results_books.features[i].attributes[3] + "\",";
         var string = string + " title: \"" + results_books.features[i].attributes[4] + "\"";

}

但是我如何将字符串推入JSON数组并且是正确读取属性的方法？

编辑：将逗号添加到字符串

Answer 1

只使用对象文字而不是构建字符串：

for (var i=0, il=results_books.features.length; i<il; i++) {
     var featureAttributes = results_books.features[i].attributes;
     var book = {
        "id" : featureAttributes[0],
        "date" : featureAttributes[1],
        "quantity" : featureAttributes[2],
        "amount" : featureAttributes[3],
        "title" : featureAttributes[4]
      };
      // push into array   
}

无需使用中间字符串，立即创建完整的对象。

将数据推入json数组

1 个答案: