One thing programming languages share is something called memory life cycle. This life cycle describes the way memory is managed. It is composed of three steps. The first step is about allocating the memory you need. This happens when you declare new variables and assign the values, call a function that creates values, etc.
This third step is critical. Without it, your program would continue to consume more and more memory until no more was available. Then, it would crash. It is also this final step that is the most difficult to do correctly. Whether is it for you as a developer in low-level language or the language itself.
As we discussed, the third step is the most difficult step of the whole memory life cycle. How does the garbage collection know what memory should be released? There are few tools and tricks garbage collection uses to figure this out. Let’s take a look at each of these tools and tricks.
WeakMap allows you to add additional data into an Object that belongs to another or third-party code. With the special “weak” link feature of WeakMaps, we can make sure the data associated with this alien object, would only exist as long as the object is alive.
Import and export statements are two great features introduced ES6 (ES2015). These two statement allows you to export and import your code and use it whenever you need. This tutorial will show you what import and export statements are, how they work and how to use them.
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