Question

我列出了JSON响应，我想访问第一个"name": "Facebook, Inc."

{
    "ResultSet": {
        "Query": "FB",
        "Result": [{
            "symbol": "FB",
            "name": "Facebook, Inc.",
            "exch": "NAS",
            "type": "S",
            "exchDisp": "NASDAQ",
            "typeDisp": "Equity"
        }, {
            "symbol": "FBIOX",
            "name": "Fidelity Select Biotechnology Portfolio",
            "exch": "NAS",
            "type": "M",
            "exchDisp": "NASDAQ",
            "typeDisp": "Fund"
        }, {
            "symbol": "FBP",
            "name": "First Bancorp",
            "exch": "NYQ",
            "type": "S",
            "exchDisp": "NYSE",
            "typeDisp": "Equity"
        }, {
            "symbol": "FBNK",
            "name": "First Connecticut Bancorp, Inc.",
            "exch": "NMS",
            "type": "S",
            "exchDisp": "NASDAQ",
            "typeDisp": "Equity"
        }, {
            "symbol": "FBHS",
            "name": "Fortune Brands Home &amp; Security, Inc.",
            "exch": "NYQ",
            "type": "S",
            "exchDisp": "NYSE",
            "typeDisp": "Equity"
        }, {
            "symbol": "FB2A.DE",
            "name": "Facebook, Inc.",
            "exch": "GER",
            "type": "S",
            "exchDisp": "XETRA",
            "typeDisp": "Equity"
        }, {
            "symbol": "FBIZ",
            "name": "First Business Financial Services, Inc.",
            "exch": "NMS",
            "type": "S",
            "exchDisp": "NASDAQ",
            "typeDisp": "Equity"
        }, {
            "symbol": "FBR",
            "name": "Fibria Celulose S.A.",
            "exch": "NYQ",
            "type": "S",
            "exchDisp": "NYSE",
            "typeDisp": "Equity"
        }, {
            "symbol": "FBC",
            "name": "Flagstar Bancorp Inc.",
            "exch": "NYQ",
            "type": "S",
            "exchDisp": "NYSE",
            "typeDisp": "Equity"
        }, {
            "symbol": "FFG",
            "name": "FBL Financial Group Inc.",
            "exch": "NYQ",
            "type": "S",
            "exchDisp": "NYSE",
            "typeDisp": "Equity"
        }]
    }
}

我使用以下JavaScript代码来获取值：

     var res = jQuery.map(data.ResultSet.Result, function (item) {
     var asset = {
     symbol:item.symbol,
     name:item.name,
     type:item.type,
     exch:item.exchDisp
            }; 
     var cname=asset.name

但是我在变量cname中得到了姓氏。如何将名字变成cname？

Answer 1

您正在获取最后一个值，因为您在map内使用它。

在每次新cname时创建地图新项目时，它会替换之前的cname。

将cname置于map

之外

喜欢这个

var res = jQuery.map(data.ResultSet.Result, function(item) {
    var asset = {
        symbol: item.symbol,
        name: item.name,
        type: item.type,
        exch: item.exchDisp
    };
    return asset;
});

var cname = res[0].name

Answer 2

var resultArray = data.ResultSet.Result;
var cname = "";
var firstRecord = resultArray[0];
cname = firstRecord.name;

Answer 3

我会像这样使用lodash的find函数：

var target = _.find(data.ResultSet.Result, function(r){
    return r.name === "Facebook, Inc.";
})

这是一个jsfiddle：

https://jsfiddle.net/mckinleymedia/hxnp99vg/

这将在数组中找到第一个与return中的条件语句匹配的对象：r.name ===“Facebook，Inc。”。

如何使用JavaScript从JSON字典中获取第一个值

3 个答案: