revisit

I'm using React + NextJS to display a list of products on a category page.

I can get the products just fine using getServerSideProps, but I don't like that it re-requests the product list on each visit to the same page. I'm trying to memoize a function that gets the list, and while that seems to work (meaning there are no errors thrown), the supposedly memoized function is still called on subsequent visits to the same page.

See the code below, and note that the "get category" console log is shown in the terminal window when I revisit a page, and in Chrome's network tools I see a fetch request made by NextJS.

How can I make it cache the result of my getCategory function so it doesn't keep fetching it?

Over many years I've struggled with this same issue. I cannot seem to work out how to use a JavaScript library from TypeScript, reliably.

I seem to get it working by accident and then move on and not revisit such code for years until a extrinsic change forces a breakage, like today when I updated VS 2019.

I've spent days reading about modules and requires and loaders, but I get more and more confused.

Example. I want to use DayJS in a TypeScript .ts file I am writing.

Here's the sample code.

I am revisiting Apple Curriculum books and trying to complete exercises in different ways. The problem is simple: I am given an array, which I have to loop through to count votes.

I have an app that has an attachments feature for users. They can upload documents to S3 and then revisit and preview and/or Download said attachments.

I was planning on storing the S3 urls in DB and then pre-signing them when the User needs them. I'm finding a caveat here is that this can lead to edge cases between S3 and the DB.

I.e. if a file gets removed from S3 but its url does not get removed from DB (or vice-versa). This can lead to data inconsistency and may mislead users.

I was thinking of just getting the urls via the network by using listObjects in the s3 client SDK. I don't really need to store the urls and this guarantees the user gets what's actually in S3.

Only con here is that it makes 1 API request (as opposed to DB hit)

Any insights?

Thanks!

this one is a little past my capabilities at the moment and welcome some guidance.

Challenge:

I have a hairdresser with available timeslots as per below, all slots are 30 mins in length nb.timeslots are INT.

depending on what the customer needs they could book up to 4 slots in a row. I need to display to the customer the timeslots that are available for booking based on whatever product they select. i.e just first slot.

Sometimes when closing vscode, or a tab therein, I get a dialogue asking "Do you want to save the changes you made to filename?" However, the unsaved edits are actually from a previous session that was closed without such a query, probably when turning off the computer, so I can't remember if it was meaningful edits, or maybe just an accidental key-press, like a shortcut gone wrong; and doing undo to revisit the last edits doesn't work either.

My question: How can I see the diff between the saved version of a file, and the version in the editor window? I think it would be nicest just to have a "show diff" option in the dialogue, but for now I'm also happy with a command line diff command.

I'm using ubuntu 20.04.

I'm attempting to use Stormcrawler to crawl a set of pages on our website, and while it is able to retrieve and index some of the page's text, it's not capturing a large amount of other text on the page.

I've installed Zookeeper, Apache Storm, and Stormcrawler using the Ansible playbooks provided here (thank you a million for those!) on a server running Ubuntu 18.04, along with Elasticsearch and Kibana. For the most part, I'm using the configuration defaults, but have made the following changes:

• For the Elastic index mappings, I've enabled _source: true, and turned on indexing and storing for all properties (content, host, title, url)
• In the crawler-conf.yaml configuration, I've commented out all textextractor.include.pattern and textextractor.exclude.tags settings, to enforce capturing the whole page

After re-creating fresh ES indices, running mvn clean package, and then starting the crawler topology, stormcrawler begins doing its thing and content starts appearing in Elasticsearch. However, for many pages, the content that's retrieved and indexed is only a subset of all the text on the page, and usually excludes the main page text we are interested in.

For example, the text in the following XML path is not returned/indexed:

Suppose I have a list of (greyscale) pixels, e.g.

I working on an Android App using Xamarin.Forms. I have a few problems with the navigation.