I wasn't going to publish this version, but I just used it a second time, so maybe someone else will need it too. This is very much like the second version above except that it uses a non-generic
. Today, I used this to find and insert
s in a
, yesterday I used it with a
public static bool TryGetIndex<T,U>
this System.Collections.IList List
out int Index
bool result = false ;
Index = 0 ;
int lo = 0 ;
int hi = List.Count - 1 ;
while ( !result && ( lo <= hi ) )
Index = lo + ( hi - lo ) / 2 ;
int diff = Comparer ( Sought , (U) List [ Index ] ) ;
if ( diff == 0 )
result = true ;
else if ( diff < 0 )
hi = Index - 1 ;
lo = ++Index ;
return ( result ) ;
Note that this is not as type-safe as when using the generic version. This hasn't caused me any trouble (yet) and you can add some protection if you encounter any problems.
BSCS 1992 Wentworth Institute of Technology
Originally from the Boston (MA) area. Lived in SoCal for a while. Now in the Phoenix (AZ) area.
OpenVMS enthusiast, ISO 8601 evangelist, photographer, opinionated SOB, acknowledged contrarian
"If you need help knowing what to think, let me know and I'll tell you." -- Jeffrey Snover [MSFT]
"Typing is no substitute for thinking." -- R.W. Hamming
"I find it appalling that you can become a programmer with less training than it takes to become a plumber." -- Bjarne Stroustrup
ZagNut’s Law: Arrogance is inversely proportional to ability.
"Well blow me sideways with a plastic marionette. I've just learned something new - and if I could award you a 100 for that post I would. Way to go you keyboard lovegod you." -- Pete O'Hanlon
"linq'ish" sounds like "inept" in German -- Andreas Gieriet
"Things would be different if I ran the zoo." -- Dr. Seuss
"Wrong is evil, and it must be defeated." – Jeff Ello
"A good designer must rely on experience, on precise, logical thinking, and on pedantic exactness." -- Nigel Shaw
“It’s always easier to do it the hard way.” -- Blackhart
“If Unix wasn’t so bad that you can’t give it away, Bill Gates would never have succeeded in selling Windows.” -- Blackhart
"Omit needless local variables." -- Strunk... had he taught programming
"We learn more from our mistakes than we do from getting it right the first time."
My first rule of debugging: "If you get a different error message, you're making progress."
My golden rule of database management: "Do not unto others' databases as you would not have done unto yours."
My general rule of software development: "Design should be top-down, but implementation should be bottom-up."