CODEWITHSUNDEEP
rubycommandexit
Jiří Hamr
Jiří Hamr

Reputation: 3

Exit command examples

I want to press a key at any point, causing the simulation to stop without loosing data collected until that point. I don't know how to do the exit command. Can you give me some examples?

Upvotes: 0

Views: 76

Answers (1)

user1934428
user1934428

Reputation: 22225

I think, WandMaker's comment tells only half of the story.

First, there is no general rule, that Control-C will interrupt your program (see the for instance here), but assume that this works in your case (since it will work in many cases):

If I understand you write, you want to somehow "process" the data collected up to this point. This means that you need to intercept the effect of Control-C (which, IF it works as expected, will make the controlling shell deliver a SIGINT), or that you need to interecept the "exit" (since the default behaviour upon receiving a SIGINT would be to exit the program).

If you want to go along the first path, you need to catch the Interrupt exception; see for example here.

If you want to follow the second route, you need to install an exit handler. Note that it will be called too when the program is exited in the normal way.

If you are unsure, which way is better - and I see no general way to recommend one over the other -, try the first one. There is less chance that you will accidentally ruin something.

Upvotes: 2

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