When to use try and catch?

Question

Algorithms

At the interview, I was asked what is the general rule for when to do try and catch.
I answered when there is work with external resources, where the occurrence of an error does not depend on the programmer. For example, when there is work with files or a database (the file may not exist, the disk may run out of space, the connection to the database may fail)
The answer turned out to be incomplete.
Allegedly there is some kind of rule when you need to use try catch
. I myself tend to believe that the correct answer is: you need to use try catch when you can’t get by with if / else checks.
What do you think? What is the correct answer?
UPD:
A friend of mine said that you should use try / catch when a runtime exception might occur. I like it as long as I think it's the correct answer.
Answer:
Summing up, I think that this answer is correct:
you need to use try / catch when a run-time exception may occur or when, after an error, further work of the program or function does not make sense.

Answer 1

it is strange that no one said that try-catch should still be used when we do not know how to handle the situation that has arisen, and we just need to return control higher up the stack.

Answer 2

At interviews, they often ask all sorts of game. Make it a rule to find out the correct answers after the interview. To then laugh with the boys :)

Answer 3

Yes, whichever is more convenient.
try or if
As you personally feel more comfortable.
Look, in the newfangled Go language, try was generally abandoned.
True, defer was introduced there.
Exceptions have already shown their failure neverworkintheory.org/2016/04/26/java-exception-ha...
And they were abandoned in Google in C ++ code
https://google.github.io/styleguide/cppguide. html#...

Answer 4

as an option, you can use load - api.jquery.com/load . But as for me, it’s better to send an Ajax request and on the server do everything you need to return the block and insert it in the right place.

$('#button1').click(function() {
   $( "#result" ).load( "bloks/blok3.php" );
});
$('#button2').click(function() {
   $( "#result" ).load( "bloks/blok1.php" );
});
$('#button3').click(function() {
   $( "#result" ).load( "bloks/blok2.php" );
});

Answer 5

This phenomenon is called hijax and it consists of ajax requests. In short, we request a page with Ajax and insert it. There is also a more universal option - use the load function - ruseller.com/jquery.php?id=16