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Human Who Codes
Human Who Codes
The tech-related writings of Nicholas C. Zakas
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Creating a JavaScript promise from scratch, Part 6: Promise.all() and Promise.allSettled()

In my last post, I walked you through the creation of the Promice.race() and Promise.any() methods, both of which work on multiple promises and return a single promise that…


Creating a JavaScript promise from scratch, Part 3: then(), catch(), and finally()

In my first post of this series, I explained how the Promise constructor works by recreating it as the Pledge constructor. In the second post in this series, I explained how asynchronous…


Creating a JavaScript promise from scratch, Part 2: Resolving to a promise

In my first post of this series, I explained how the Promise constructor works by recreating it as the Pledge constructor. I noted in that post that there is nothing asynchronous about the constructor…


Computer science in JavaScript: Circular Doubly-linked lists

In my previous post, I discussed what changes are necessary to turn a singly linked list into a doubly linked list. I recommend reading that post before this one (if you haven’t already). This post is about modifying a doubly…


Computer science in JavaScript: Doubly linked lists

In my previous post, I discussed creating a singly linked list in JavaScript (if you haven’t yet read that post, I suggest doing so now). A single linked list consists of nodes that each have a single pointer to the next node in the list…