Pangolin | lightweight portable rapid development library | Game Engine library

I have an application that collects crypto prices from decentralized exchanges (nothing commercial, the goal is mainly to learn some databases techs with real data). I got it working with MongoDB and PostgresSQL. However, I'm seeing massive differences when it comes to writes, in favour of MongoDB. I'm talking several orders of magnitude. I know MongoDB is a NoSQL db and is advertised to be more efficient for this kind of stuff, but I was wondering if I'm missing something with my postgres implementation. I'll describe below how I implemented the logic and I'll try to provide comparable metrics (as much as I can).

To talk to the databases, I use psycopg3 for the Postgres implementation, and pymongo for the MongoDB one.

Here is the data structure I'm writing to the databases:

I've a dict of DataFrames I've retrieved and I want to concatenate them together into one large DataFrame. Each DataFrame was retrieved successively, and each has an index column which is an integer index from 0 to n-1. Each dataframe has at most n dataframes.

I am trying to compile this version of ORB SLAM2 and after fixing some library import errors, I got this:

Is there any way to create slider using pangolin? small example of creating slider with min and max value, when user clicks on ok button then call a function.

I am trying to get 3D points using cv2.triangulatePoints but it always returns almost same Z value. My output looks like this: As it seen, all points are in almost same Z value. There is no depth.

Here is my triangulation:

In my website, I have a menu open when users click to toggle. It works fine when I click a link that moves to a particular section. What I want is when the user clicks a link close menu and view toggle. I able to do that but I can't open the menu again by clicking toggle again. Here is what done. When I click to toggle it is not view my menu.

On my site, I had an index.php with a navbar. Then, I needed to add another page, called second.php, and updated my navbar code accordingly (I have a nav.html file for the navbar, so that I can use JS to load it onto each page of the site). I also added the navbar code to the second.php. However, when I opened index.php, the link to second.php didn't appear.

I tried restarting my computer, restarting my MAMP server, reopening my code editor, reopening the browser, but nothing worked. Then, I tried renaming my files (for both the purpose of testing and because I needed better file names) and updated all instances of the name of the files accordingly. But then this appeared:

followed by a list of the files in my directory. In particular, the site wasn't displaying. Could someone please explain what's happening and how I can fix it?

nav.html:

This is a stochastic problem. When I re-make my project, this problem is more likely to happen. I used gdb core dump analysis and found out that cv::namedWindow function may be the reason?

This is main.cpp

I am new to pangolin and trying to compile a 'hello world' code of pangolin on Qt Creator. I have run into this "undefined reference" issue while compiling it. My code is simple :