Dream OS :

Software and Hardware support windows level.

Updation and security Linux level

Any opinion?

During my internship, I fixed a bug in android app related to user data updation..

BUT I didn't knew it's root cause and I have no idea how I fixed it.
Also, it was satisfying.

So today i had to visit this banks site to do updation on a document but for some reason the modal dialogue that was supposed to open was not working and i couldn't continue to next step.

On an attempt to contact customer support, i browsed the site for relevant details. As i do that, i observed this site is so shitty that it can't even properly render on Google Chrome! It was an horrific experience finding info in that site.

Finally found the customer support form and as I clicked the "submit" it didn't give any feedback whether it was processing or not. After like over a minute of uncertainty, it got redirected to a 404 page.

Frustrated, I went on to their twitter and I almost tweeted calling out their terrible web developer team.

But, my instinct told me to calm my titties and i tweeted a regular confused user tweet.

Got their attention and few hrs later i got a phone call from someone working there. He didn't sound like a customer service representative from the way he spoke. He told it was an issue with their website and had fixed it. I tried again as he was on the line but it was not working for me. And then i shared screenshot of the issue. He tested it again and said it was working for them. Still not working for me. ( Probably cache issue on my end ). Thought he would suggest to clear cache and try. But he asked me to try on another computer since it was working for him.

As i searched for a another system, i got a call from customer support guy and he said he will do the update on their end and told me to tell details. Since the info was not that sensitive in nature, I went with it.

Pretty sure the other guy i talked to was a developer.

This made me think - had i tweeted out a mean tweet calling out their shitty website it would have been probably awkward talking to him - I'd have to be mean again. It could've ruined his day, maybe he was under pressure from his pm that he had to make the phone call. He probably hates his job already managing that shitty legacy code..

I don't know - either way, I'm glad i was able to keep myself calm and not be a source of negative energy.

An important query, it would be of great help if someone could help me with this.
I am working on a project which requires real-time updation of content on the client and server- much like evernote or google keep- I should be able to update the server with the changes made to the app and vice versa, real-time.
I have seen sync adapter, but it is asynchronous and thus, non real-time. Other option is using an IntentService, as given on android dev site.
Is there any other thing I can do to achieve the goal?
Thanks in advance

(tldr: are foriegn keys good/bad? Can you give a simple example of a situation where foriegn keys were the only and/or best solution?)

i have been recently trying to make some apps and their databases , so i decided to give a deeper look to sql and its queries.

I am a little confused and wanted to know more about foreign keys , joins and this particular db designing technique i use.

Can anyone explain me about them in a simpler way?
Firstly i wanted to show you this not much unheard tecnique of making relations that i find very useful( i guess its called toxi technique) :
In this , we use an extra table for joining 2 tables . For eg, if we have a table of questions and we have a table of tags then we should also have a table of relation called relation which will be mapping the the tags with questions through their primary IDs this way we can search all the questions by using tag name and we can also show multiple tags for a question just like stackoverflow does.

Now am not sure which could be a possibile situation when i need a foriegn key. In this particular example, both questions and tags are joined via what i say as "soft link" and this makes it very scalable and both easy to add both questions and new tags.

From what i learned about foriegn keys, it marks a mandatory one directional relation between 2 tables (or as i say "hard a to b" link)
Firstly i don't understand how i could use foriegn key to map multiple tags with a question. Does that mean it will always going to make a 1to1 relationship between 2 tables( i have yet to understand what 11 1mant or many many relations arr, not sure if my terminology is correct)

Secondly it poses super difficulty and differences in logics for adding either a tag or question, don't you think?
Like one table (say question) is having a foreign key of tags ID then the the questions table is completely independent of tag entries.

Its insertion/updation/deletion/creation of entries doesn't affect the tags table. but for tag table we cannot modify a particular tag or delete a tag without making without causing harm to its associated question entries.
if we have to delete a particular tag then we have to delete all its associated questions with that this means this is rather a bad thing to use for making tables isn't it?

I m just so confused regarding foriegn keys , joins and this toxi approach. Maybe my example of stack overflow tag/questions is wrong wrt to foreign key. But then i would like to know an example where it is useful