Editing programs “while they are running”? Why?

Question

I\'ve been getting more into Lisp and Lispy languages lately, and I\'m finding them quite powerful.

One thing I\'ve been reading all over the net is that a benefit o

Answer 1

I remember somebody from NASA described his experience. His team implemented the soft used in a spaceship back in the 70s. And they effectively modified their soft remotely on the fly when some bugs were found.

Or imagine you have a long process taking days to execute and at the end it cannot write results because of permissions or other small problem.

Yet another example. You are in the integration phase and you have to make a lot of small changes. And again a lot of them. I dream about such a possibility in Java because currently it takes me 30-40 min to rebuild and reinstall my application (to rebuild it again in 10 min).