As the name suggests, both sides are talking to a single database. Commands execute use-case in the domain which modifie

In the Event-sourcing approach, we are not storing only the current state of entities, but we are storing every state that happened to the entity as snapshots. Entities are not saved as normalized data, but as their direct modifications with the timestamp of an event.

Reading and literacy researchers argue that the act of scrolling compromises your ability to absorb text, and the smaller the screen, the more you have to scroll to finish it.

For the last few years of my career, I’ve felt the weighty realization that the design industry’s accepted and most practiced ways of creating digital products are more deeply flawed than I ever imagined and much more than most will admit — as is the way we educate aspiring designers. This has been nagging at me to such an extent that I realized I could not stay complacently on the sidelines watching it happen any longer. If you follow me on Twitter, then you know I haven’t exactly been silent on this topic, but up until now, I haven’t really pushed for action, and that platform doesn’t really lend itself to fully expressing ideas. This then is my attempt to get a lot of my thoughts out in one place to hopefully catalyze new discussions. And I know many of you share these feelings even if you don’t dare talk about them.

Once we have the current entity, commands can modify it. Modifications will generate a new event that we will store in the Event Store. Therefore, we push the current state of the entity into a Read Database so reading can stay to be extremely fast.

There’s another factor affecting your ability to readily grasp information on your screen: scrolling. Reading and literacy researchers argue that the act of scrolling compromises our ability to absorb text, and the smaller the screen, the more you have to scroll to finish it. People are already less willing to read long texts on a screen than a physical document of the same length; while I appreciate my Kindle, I much prefer to read paper books (though storage in my apartment is rapidly becoming an issue), and some aspects of reading comprehension, such as temporality (knowing when something occurred in a story), are more difficult when you’re reading from a screen instead of a paper book.

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excel() above accepts writer as a parameter which is of type XlsxWriter. To automate this process, depending on your workflow, you can add this as a function to your scripts by calling format_excel() wherever you are using with pd.ExcelWriter( ... ) as writer and pass writer to format_excel( ... , writer=writer).

Layers in Software Architecture that Every Sofware Architect should Know “All architectures have the same objective - the separation of concerns. They all achieve it by dividing the software…danielrusnok.medium.com

In the Two-database approach, we have two dedicated databases, one for writing operations and one for reading operations. Commands side has Write Database optimized for writing operations. Query side has Read Database optimized for reading operations.

This architecture brings orders of magnitude improvements in performance on the queries side of the software and that is a good thing because the software users are generally spending more time with reading data than writing.

From Monolith to Microservices in 5 Minutes a microservice architectural style is an approach to developing a single application as a suite of small services —…levelup.gitconnected.com

But a larger iPhone screen mitigates some of these issues. When your eyes can see more text at once, you’re able to put words in greater context, allowing for better reading comprehension. You’re also, of course, scrolling less. Anyone who’s doing a lot of reading on their smartphone should seriously consider getting a bigger smartphone for this reason alone.

With every state changed by the command, the modified data has to be pushed from Write Database into the Read Database either as a single coordinated transaction across both databases or using the Eventual Consistency Pattern.

With this portentous beginning to many a well-intentioned post, you can almost be certain that what follows will be some distillation of painfully direct life advice intended to remind people of what’s important. Consider this article a really extended version of that, directed primarily at digital designers in senior and leadership roles as they are our industry’s best chance to right the ship. In order to bring you to the forward-thinking, uplifting bit, I’m going to have to first unsettle you with some difficult truths.

Physical books are a little better than e-books when it comes to reading comprehension, but there’s not much of a contest when comparing e-books to smartphones. The smaller screen on the smartphone, the scrolling versus tapping/turning mechanism for turning the book’s pages, and the countless distractions posed by having the world at your fingertips make trying to read anything much longer than a blog post pretty damn hard on a tiny smartphone screen.

Layers in Software Architecture that Every Sofware Architect should Know “All architectures have the same objective - the separation of concerns. They all achieve it by dividing the software…danielrusnok.medium.com