我正在将对象传递给函数。下面是简化的示例：
countyInfo(sales.NY2008);
对象是：
{countyName:"Albany",percentage:0.864789889,percentageComparison:40.18903649,sales:1222},
{countyName:"Allegany",percentage:0.789529462,percentageComparison:27.98874729,sales:149},
{countyName:"Broome",percentage:1.009475302,percentageComparison:63.64364553,sales:880},
{countyName:"Cattaraugus",percentage:0.874885092,percentageComparison:41.82554597,sales:276},
{countyName:"Cayuga",percentage:0.801267677,percentageComparison:29.89160156,sales:268},
{countyName:"Chautauqua",percentage:0.830185925,percentageComparison:34.5794701,sales:455},
{countyName:"Chemung",percentage:0.744919757,percentageComparison:20.75717391,sales:272},
{countyName:"Chenango",percentage:1.191003494,percentageComparison:93.07074993,sales:242},
{countyName:"Clinton",percentage:0.767315265,percentageComparison:24.38765663,sales:265},
{countyName:"Columbia",percentage:0.83461736,percentageComparison:35.29783949,sales:260},
{countyName:"Cortland",percentage:1.144086442,percentageComparison:85.46513794,sales:234},
它工作得很漂亮。
现在，我想由变量组成此参数。
var getLocation = "NY";
var getYear = "2008";
var getParameter= getLocation + getYear;
countyInfo(sales.getParameter)
当我传递字符串时，它不起作用。但是如何做到这一点？
只需更改您的代码即可使用方括号表示法访问对象属性，而不是点表示法
var getLocation = "NY";
var getYear = "2008";
var getParameter= getLocation + getYear;
countyInfo(sales[getParameter]);
点表示法：
括号符号：
有关详细说明，请参考-
https://codeburst.io/javascript-quickie-dot-notation-vs-bracket-notation-333641c0f781
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我来说两句