如何更新数组范围变量中的值? [英] how to update a value in array scoped variable?

问题描述

我有一个存储档案的作用域变量:

viewScope.MY_SCOPE = new Array();viewScope.MY_SCOPE.push(["id0", 0, true]);viewScope.MY_SCOPE.push(["id1", 1, false]);viewScope.MY_SCOPE.push(["id2", 3, true]);

现在我想更新其中一项.

viewScope.MY_SCOPE[1][2] = "true";

这失败并出现错误:

<块引用>

执行 JavaScript 动作表达式时出错 put(int index,FBSValue value) 在 JavaWrapperObject 中不受支持.

如何更新数组中的特定项目?

解决方案

当将 SSJS 数组对象添加到作用域时，它被转换为 java.util.Vector.因此，如果你想设置这个值，你应该使用

viewScope.MY_SCOPE[1].set(2,"true");

而不是 viewScope.MY_SCOPE[1][2] = "true";.

我认为问题在于使用 ...[2]= "true" 尝试执行给定对象的 put 方法.虽然 put 在 Maps 中可用，如 HashMaps 或范围映射，但 Vectors 使用 set 而不是 put 来更改值.因此，您会收到不支持操作表达式 put(...)"错误.与此相反，使用 viewScope.MY_SCOPE[1][2] 获取变量没有问题，因为 get 方法在 HashMaps 和 Vectors 中都可用.>

I have a scoped variable that stores an archive:

viewScope.MY_SCOPE = new Array();
viewScope.MY_SCOPE.push(["id0", 0, true]);
viewScope.MY_SCOPE.push(["id1", 1, false]);
viewScope.MY_SCOPE.push(["id2", 3, true]);

now I want to update one of item.

viewScope.MY_SCOPE[1][2] = "true";

and this fails with the error:

Error while executing JavaScript action expression put(int index,FBSValue value) not supported in JavaWrapperObject.

How do I update a specific item in the array?

解决方案

When adding the SSJS array object to the scope, it is converted to a java.util.Vector. Hence, if you want to set the value, you should use

viewScope.MY_SCOPE[1].set(2,"true");

instead of viewScope.MY_SCOPE[1][2] = "true";.

I think the problem is that using ...[2] = "true" tries to execute the put method of the given object. While put is available in Maps like HashMaps or the scope maps, Vectors use set instead of put to change values. For that reason, you get the "action expression put(...) not supported" error. In contrast to this, it's no problem to get the variable with viewScope.MY_SCOPE[1][2] because the get method is availiable in both HashMaps and Vectors.

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