DEV Community: Barney

How do you build AWS AMIs?

Barney — Thu, 22 Dec 2022 09:49:25 +0000

How do you build an AMI locally manually? I don't want to create AMI from existing EC2 but that's the only thing that I found online.
I have my jar and I want to create an AMI from my jar.

Redis as primary database?

Barney — Fri, 23 Apr 2021 08:04:05 +0000

Hi!

https://redislabs.com/blog/goodbye-cache-redis-as-a-primary-database/

This says now with AOF it can be used as a primary database. Any thoughts on this? Or experience? For simple apps this could be pretty cool.

Anyone know what's up with these "fake" github accounts forking/starring random repositories?

Barney — Fri, 09 Apr 2021 17:44:43 +0000

Hey!

I've been doing many POC projects and sharing them on Github. Most of the time these are just tutorials I've completed. Nothing interesting or valuable really. And time to time I notice that someone starred my repo. I checked these account's activity and it seemed like they are just starring and forking random (random to me) repositories. Does anyone have an idea why?

How many threads should I create? (worker_threads) Nodejs

Barney — Mon, 30 Nov 2020 14:51:13 +0000

I recently started looking into nodejs's thead_workers module. It seems really interesting however there is one thing that is not self-evident. The official documentation says that I should create a threadpool. But what should be the size of my threadpool? Should it be equal to my phyisical CPU count or cpu's thread count? For example I have a i5 with 4 cores and 8 threads. On my machine should I create a threadpool of 4 or 8? Less or more?

can't use .filter() after .forEach()

Barney — Tue, 11 Aug 2020 11:46:03 +0000

Hi!

So I came across this problem.

I have an array of N elements. I'd like to run every element against a function.

so I would go:

myArray.forEach(item=>process(item)

Now I want to filter some of them and call another function on the rest of them.

   .forEach(item=>process(item)
   .filter( somelogic )
   .forEach( item=>postProcessSome(item) );

But that's not valid code. forEach returns undefined so I can't call filter. I can use map instead of forEach but that way I can't use one liners.

What's an elegant way to do this? For example in Java I could use .peek that acts like a foreach but returns the value.

Thanks for help.

How to run a long lasting query without interruption?

Barney — Fri, 26 Jun 2020 15:36:10 +0000

I have a query like this:

insert into table1 (field1, field2) select (field1, field2) from table2

It's running on a huge table with millions of rows. It might take several hours or days but it wouldn't be a problem. The problem is right now that my client (dbeaver) constantly dropping the connection and my query fails. How would you handle this problem?
Thanks

Expose local server over SSL? (Messenger bot)

Barney — Sat, 20 Jun 2020 16:34:22 +0000

Hi!

In the past I've been working on a chatbot and now I want to continue development but I can't seem to find a solution to expose my local server over HTTPS. Facebook messenger API only works over HTTPS.

I've read some articles about ngrok but it recently changed plans so the free plan no longer works (no static address which makes development possible but uneasy).

Also I've found another service called serveo.net whichs looked promising but it seems like HTTPS is not supported.

Any suggestion?

Thanks!