Comments for What I learned today ?

Comment on return and exit from main: difference by innqubus

innqubus — Thu, 12 Jun 2008 02:30:56 +0000

U have taken main() as an example for differentiating betn return and exit…
in any other functions apart from main.. dont have have any difference?

Comment on to switch-case or not to ! by atmcgui

atmcgui — Wed, 11 Jun 2008 15:58:57 +0000

I have coded some jump tables in assembly before. I would say they are more efficient than if-else cascades. If switch structures are implemented with strings (as in Java) my guess is they would be about the same speed as if-else cascades ( maybe faster still depending on how they do the strcmp ).

As it turns out, I am using switch structures to speed up a program I am writing right now. ( I had just googled my way here looking for if the compiler implements them as jump tables or not ).

Comment on A generic binary search implementation in C – thoughts by awmanoj

awmanoj — Sun, 30 Mar 2008 12:22:29 +0000

you’re welcome shailendra.. !

Comment on A generic binary search implementation in C – thoughts by sbaghelin

sbaghelin — Sun, 30 Mar 2008 11:34:16 +0000

Ok. Thanks for the fast response. This solves the puzzle.

Comment on A generic binary search implementation in C – thoughts by awmanoj

awmanoj — Sun, 30 Mar 2008 11:32:22 +0000

compare function will be implemented by the person who is using the binsearch function. It will be something like this –

// suppose my array is of a int
int mycompare4int (void *a, void *b)
{
int *ma = (int *) a;
int *mb = (int *) b;
if(*ma > *mb)
return 1;
if(*ma < *mb)
return -1;
return 0;
}

similarly for float and other data structures.

Comment on A generic binary search implementation in C – thoughts by sbaghelin

sbaghelin — Sun, 30 Mar 2008 11:14:38 +0000

Can you provide some psuedo-code for compare() as that is the crux of solving the puzzle?

Comment on failed to retrieve keys – Automatix ! by awmanoj

awmanoj — Fri, 04 Jan 2008 08:04:52 +0000

hey.. nice to see that people get their problem solved.. !

Comment on failed to retrieve keys – Automatix ! by nishanth2

nishanth2 — Fri, 04 Jan 2008 01:26:58 +0000

Thank you so much Manoj … i’ve been struggling with the sam eand finally got through with your suggestions

Comment on to switch-case or not to ! by awmanoj

awmanoj — Sat, 15 Sep 2007 03:58:30 +0000

Thanks for the information. My comment was (very much) limited to C/C++ (as my exposure is). But had I mentioned that, enlightenment with this revelation would not have happened.

Read your blog, Nice posts.

-Manoj

Comment on to switch-case or not to ! by drj11

drj11 — Fri, 14 Sep 2007 17:23:38 +0000

switch in C, as you say, can only take constant expressions for the case labels. switch in JavaScript can take arbitrary expressions (for example, strings "foo", conditionals x > y, computed expressions x*x).