mappa | Mappa -- Topic Maps engine | Map library

I'm trying to write into my Cloud Firestone the data regarding the registered user in collection Users, of course it must be associated with UID code in Authorization (The Registration/login system working correctly and write auths in my Firebase).

XML Register Button:

In my web page I have 3 selects and I need to make sure that when the value inside each select changes, the parameters that make up a url in the href change.

this is the html code of the select:

I have a text file with many rows that generally follow the patterns shown below and I'd like to extract the segments numbered 1-4 in the image below. I cannot do it with Excel because the punctuation is not sufficiently consistent so I'd like to use RegEx.

I am looking for 4 distinct RegEx expressions, corresponding to the 4 items.

What I have so far:

• (.+?(?=/)) gets me everything up to the / but I can't figure out how to split it in the Yellow and Cyan sections
• (?<=\/\s)(.*) gets me everything after the / but includes the Mintmark portion

Here is a good sample of the file contents:

I'm having some hard time with the shared memory, I get segmentation fault when I try to see what's inside a variable

printf("|%d|", mappa->map[i][j]->taxi);

but not when I'm writing on it

mappa->map[i][j]->taxi = rand() % 10;

my first guess was: ok I'm not allocating enough space. But wouldn't fail also the instruction when trying to write on "taxi"?

PS I need to have "taxi" inside a struct because later I will have more elements in that struct

I'm new to web-scrapping but I've tried it all and can't find a solution to this. This is the web page where I'm trying to get the information I nned: https://www.immobiliare.it/ricerca-mappa/Torino,TO/#/linkZona_/latitudine_45.04463/longitudine_7.68199/idContratto_1/idCategoria_23/zoom_16/pag_1

and this is the XPath associated to the node I'm intreseted:

I'm developing a JS webapp with Google Maps API.

I have to calculate the distance from A/D to B, B to C and C to A/D (please check the next image).

https://imgur.com/a/OiKJaXA

But, on the map, I have to render ONLY the second leg (legs[1], B to C). (check the image for more info)

https://imgur.com/a/zjQUu9h

What can I do to hide the first and last leg of my route? Of course, I could do another request, one for the map, one for the calculations, but I'm trying to be as efficient as possible.

My JS:

Hello the code below displays a map with the user's position using the google_maps_flutter and location package, the code below correctly displays the map with the initial position of latitude and longitude but when the user starts the app from the device the position does not it becomes the actual one of the user but remains on the initial position, how do I solve this?

Flutter Code:

I am able to load a csv file if it is in the same working directory for example:

I'm trying to read a text file in an Arduino SD card reader and copy its text into a string variable, but the function .read always returns -1. How can I solve this problem?

Here's the code: