How best?

Question

Programming

1 option:

switch(a)
{
   case 0: 
   {
      b = 2;
      return 1;
   }
case 1: 
   {
      b = -1232;
      return 1;
   }
case 2: 
   {
      b = 12322;
      return 1;
   }
}

Option 2:

switch(a)
{
   case 0: 
   {
      b = 2;
   }
case 1: 
   {
      b = -1232;
   }
case 2: 
   {
      b = 12322;
   }
}

That is, if one of the cases is executed, the others will not work, and the second option is better?

Answer 1

break

Answer 2

firstly, in the second option, a break is needed, and secondly, this is not an optimization that you should worry about, but rather a matter of taste.

Answer 3

It is better to store the data in a map and issue it by key.

Answer 4

in general, it’s break, but in fact it doesn’t matter, if you are not going to check this case three billion times per second, any computer will gobble up this condition and will not choke even with hundreds of thousands of cycles per second.