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Mar 13, 2021 · 7 min read · Maps are a JavaScript object that maintain order--meaning that iterating over a Map will do so in the order that the key/value pairs were added (not updated). For example, using a for...of loop provides us with a [key, value] for every iteration: con...
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Mar 13, 2021 · 3 min read · In JavaScript, a bound function means that the original function definition is essentially wrapped in another function definition; however, the inner function gets returned out from the outer function, thus creating closure and permanently binding th...
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Mar 13, 2021 · 2 min read · Prototypes are an excellent way to conserve memory by allowing failed property lookups, such as methods (see below), to traverse the object’s prototype chain. Put another way, if we invoke a method on an object, but that method does not exist on tha...
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Mar 7, 2021 · 8 min read · NodeJS can be used to automate data transformation and downloading. For example, I recently had over 14,000 lines of code staring back at me, and I contemplated how I was going to access certain nested photo URLs within that code. Still, after findin...
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Mar 7, 2021 · 3 min read · Promises - why are they so appealing? One reason to use Promises is to run our code asynchronously, in a non-blocking manner, by making use of the browser (XHR) and APIs to retrieve data. fetch() is a good example of this. Promises act as a placehold...
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