javascript - 在 Javascript 中循环对象数组

Question

这个问题已经有答案了:

Accessing an object property with a dynamically-computed name (19 个回答)

已关闭 6 年前。

我试图理解这一点，但由于某种原因我无法理解。我对 Javascript 还很陌生......

这就是我想做的。

var companyList = {};
companyList.comanyZero = {
  fldStreet: "That street 0",
  fldPostcode: "0000 AA",
  fldCity: "Amsterdam",
  fldCountry: "The Netherlands"
};
companyList.companyOne = {
  fldStreet: "Street name 1",
  fldPostcode: "1234 BA",
  fldCity: "Amsterdam",
  fldCountry: "The Netherlands"
};

if (!event.willCommit){ 

if (event.changeEx === "companyZero"){
    this.getField("fldStreet").value = companyList.companyZero.fldStraat;
    this.getField("fldPostcode").value = companyList.companyZero.fldPostcode;
    this.getField("fldCity").value = companyList.companyZero.fldCity;
    this.getField("fldCountry").value = companyList.companyZero.fldCountry;
}

if (event.changeEx === "companyOne"){
    this.getField("fldStreet").value = companyList.companyOne.fldStreet;
    this.getField("fldPostcode").value = companyList.companyOne.fldPostcode;
    this.getField("fldCity").value = companyList.companyOne.fldCity;
    this.getField("fldCountry").value = companyList.companyOne.fldCountry;
}
}

这个想法是创建一个循环，根据组合框中选择的内容返回值。

请注意，这是 PDF 审核，因此用户可以更改 PDF 中的组合框，并且字段将填充正确的数据。

Answer 1

我认为您只是在寻找括号符号:

if (!event.willCommit) {
    var currentCo = companyList[event.changeEx];
    if (currentCo) {
        this.getField("fldStreet").value = currentCo.fldStraat;
        this.getField("fldPostcode").value = currentCo.fldPostcode;
        this.getField("fldCity").value = currentCo.fldCity;
        this.getField("fldCountry").value = currentCo.fldCountry;
    }
}

如果 event.changeEx 包含 "companyOne"，则 companyList[event.changeEx] 将引用 companyList.companyOne.

<小时/>

由于您的属性名称和字段名称相同，您甚至可以维护要获取的键列表并使用循环更新其值:

var fieldNames = ["fldStreet", "fldPostcode", "fldCity", "fldCountry"]
if (!event.willCommit) {
  var currentCo = companyList[event.changeEx];
  if (currentCo) {
    fieldNames.forEach((name) => {
      this.getField("").value = currentCo[name];
    })
  }
}