潜在的内存泄漏 - 我应该如何解决这个问题[重复]

Question

我的 Angular 应用程序从服务器收到 JSON 格式的响应。我将响应转换为如下模型

let questionListSubscription = this.questionManagementService.questionsArray$.subscribe((result: Result) => {
        console.log("received result from question array observable", result);
        if (result.result === "success") {
            //received response from server
            let questionList = JSON.parse(result.additionalInfo) as PracticeQuestionsListAPI;
            console.log("got list of questions value ", questionList);
            //...
            this.questionsFilter["pagination-info"] = questionList["pagination-info"];
            //...
        }
    }
);

上面随机崩溃，错误ERROR TypeError: Cannot set property 'pagination-info' of undefined指向行this.questionsFilter['pagination-info'] = questionList['pagination-info'];

当我再次运行代码时，它起作用了。

上述分配是否有误并可能导致内存泄漏？

Answer 1

我认为问题在于您没有正确定义this.questionsFilter。应该定义为：

questionsFilter = {}