不允许我将对象推入数组 [英] Not allowing me to push object into an array

问题描述

我正在使用Angular.我正在尝试将对象推入数组，但是它给了我错误.它说 TypeError:无法读取未定义的属性"push" 那是下面的代码.文章是对象.

I'm working with Angular. I'm trying to push an object into an array but it giving me errors. It says that TypeError: Cannot read property 'push' of undefined That is the code below. Article is an object.

articles: Article[];
addArticle(newTitle: HTMLInputElement, newLink: HTMLInputElement): boolean {
    this.articles.push(new Article(newTitle.value, newLink.value, 0));
    newTitle.value = '';
    newLink.value = '';
    return false;
}

我该怎么办?

推荐答案

因此，如果它对您有用，并且我至少看到了一些类似的问题，就可以了. 如果您有TypeError: Cannot read property 'whatever' of undefined，则表示您未声明某些属性. 这是声明:

So if it worked for you and as I saw at least few similar questions latly. If you have TypeError: Cannot read property 'whatever' of undefined that means you didn't declared some property. This is declaration:

someProperty: SomeType = []

如果只有它的唯一定义:

if you have this its only definition:

someProperty: SomeType

并尝试对其进行任何操作都会导致上述错误.

and trying do any operation on it will result in above error.

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