Javascript 应用程序脚本：映射未将预期值返回到数组

我有一个对象数组，看起来像：

var objArray = [
  {
    " #": "4596",
    " E": "Yes",
    " Date": "06/12/20",
    " County": "Los Angeles County",
    " State": "California",
    " Acres": "2.49",
    " Eager": "Low",
  },
  {
    " #": "4588",
    " E": "Yes",
    " Date": "06/11/20",
    " County": "Towns County",
    " State": "Georgia",
    " Acres": "3.00",
    " Eager": "High",
  },
  ....
];

我试图把一系列的索引组合在一起（“#”）

到目前为止，我已经：

let indexes = objArray.forEach(function (rowObj) {
  Object.keys(rowObj).map(function (key) {
    if (key.includes("#")) {
      var v = rowObj[key];
      Logger.log(v); // abc
      return v;
    }
  });
});

Logger.log(indexes); // abc

输出：

[20-06-13 20:43:33:320 EDT] 4547
[20-06-13 20:43:33:324 EDT] 4546
[20-06-13 20:43:33:329 EDT] 4545
[20-06-13 20:43:33:450 EDT] 4543
[20-06-13 20:43:33:453 EDT] 4542
[20-06-13 20:43:33:456 EDT] 4540
[20-06-13 20:43:33:459 EDT] 4538

这产生了：

[20-06-13 20:43:33:462 EDT] null

---

我做错了什么？

< P>我认为你在中间的回归是问题所在。除此之外，一切正常

这对我很有用：

function functest() {
  var objArray =[{" #":"4596"," E":"Yes"," Date":"06/12/20"," County":"Los Angeles County"," State":"California"," Acres":"2.49"," Eager":"Low"},
                 {" #":"4588"," E":"Yes"," Date":"06/11/20"," County":"Towns County"," State":"Georgia"," Acres":"3.00"," Eager":"High"},
                 {" #":"4596"," E":"Yes"," Date":"06/12/20"," County":"Los Angeles County"," State":"California"," Acres":"2.49"," Eager":"Low"},
                 {" #":"4588"," E":"Yes"," Date":"06/11/20"," County":"Towns County"," State":"Georgia"," Acres":"3.00"," Eager":"High"},
                 {" #":"4596"," E":"Yes"," Date":"06/12/20"," County":"Los Angeles County"," State":"California"," Acres":"2.49"," Eager":"Low"},
                 {" #":"4588"," E":"Yes"," Date":"06/11/20"," County":"Towns County"," State":"Georgia"," Acres":"3.00"," Eager":"High"},
                 {" #":"4596"," E":"Yes"," Date":"06/12/20"," County":"Los Angeles County"," State":"California"," Acres":"2.49"," Eager":"Low"},
                 {" #":"4588"," E":"Yes"," Date":"06/11/20"," County":"Towns County"," State":"Georgia"," Acres":"3.00"," Eager":"High"}];
  var oA=[];
  let indexes=objArray.forEach(function(rowObj) {
    Object.keys(rowObj).map(function(key) {
      if (key.includes('#') ) {
        var v = rowObj[key];
        oA.push(v);
      }
    });
  });
  Logger.log(oA);
}//[4596, 4588, 4596, 4588, 4596, 4588, 4596, 4588]

---

作为补充答复：

你可以做得更简单更快

const值=[
{“#”：“4596”，“E”：“是”}，
{“#”：“4597”，“E”：“否”}，
{“#”：“4598”，“E”：“也许”}，
]
const index=values.map（{“#“：id}）=>id）；
控制台日志（索引）如果您要查找的密钥始终是
#
，并且如果它存在于所有对象中，则可以使用简化逻辑。请看下面的例子


const objArray=[
{
" #": "4596",
“E”：“是”，
“日期”：“20年12月6日”，
“县”：“洛杉矶县”，
“州”：“加利福尼亚州”，
“英亩”：“2.49”，
“渴望”：“低”，
},
{
" #": "4588",
“E”：“是”，
“日期”：“06/11/20”，
“县”：“乡镇县”，
“州”：“格鲁吉亚”，
“英亩”：“3.00”，
“渴望”：“高”，
},
];
常量输出=objArray.reduce(
（previousValue，currentValue）=>[…previousValue，currentValue[“#”]，
[]
);
console.log（output）
我发现使用它查看结果要快得多：
SpreadsheetApp.getUi（）.showModalDialog（HtmlService.createHtmlOutput（oA.join（“
”），“Display results”）
这是个好主意，但当我在应用程序脚本中运行它时，我得到：[null，null，null，null，null，null，null，null，null，null，null，null，null，null，null，null，null，null，null，null，null，null，null，null，null，null]，在实际代码中，
#
是否以空格作为前缀？你能展示一下你是如何实施这个建议的吗？你必须确保以下几点是正确的：1
map
直接在对象数组上调用（
objArray
）。2.
“#”
键完全由空格和哈希字符组成。3.V8运行时已启用（Mario的答案也是如此，顺便说一句）谢谢-我对js和reduce相当陌生。你能解释一下你在这里做了什么吗？很抱歉，这是一个很好的解释。我很熟悉，以前也使用过reduce，但在您的解释中，它只是一个开始。我不太清楚您使用的函数-（previousValue，currentValue）=>[…previousValue，currentValue[“#”]]-previousValue是累加器吗？我理解。是，前一个值是累加器。关于
[…previousValue，currentValue[“#”]
我正在使用扩展语法来扩展新数组中的当前累加器加上属性`#`@LDN中的currentValue的值-
[…sourceArray，value]
只是自ES6出现以来对
sourceArray.concat（[value]）
的一种更简洁的方法（请参阅）