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Фото: Влад Некрасов / Коммерсантъ
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Part of the value of push-based systems is that each node only needs to keep track of its own dependencies and dependents, which makes analysing each node locally easy, but analysing the system as a whole hard. In the extreme case, you might dynamically create and destroy nodes in the tree depending on previous values — this doesn’t make sense for our spreadsheet analogy, but is essentially what’s happening with RxJS’s switchMap operator. Essentially, the more dynamism we want in our system, the harder it is to achieve efficient updates, and the more we want efficient updates, the more we need to specify our dependency graphs up-front.
。关于这个话题，新收录的资料提供了深入分析
Иран сделал новое заявление о военном сотрудничестве с Россией19:53
穆傑塔巴‧哈梅內伊：伊朗新任最高領袖是誰？。新收录的资料是该领域的重要参考