9,483 reputation
11840
bio website en.wikipedia.org/wiki/…
location United States
age 70
visits member for 3 years, 10 months
seen 10 hours ago

BS Mechanical Engr.
PhD CS(AI)
CS Prof (4yr)
Numerous consulting jobs.
15 yr at http://www.pharsight.com
Published book on CS & several articles
4 kids, 2 grand
Pilot(student)

P.S. The picture is a Beta-prime distribution. It shows the program speedup factors you can get if you see a problem twice in 2, 3, 4, and 5 samples.


12h
comment What is meant by “OOP hides the state”?
@Phil: abstract is another one of those words :)
1d
answered What is meant by “OOP hides the state”?
Jul
7
comment How bad is it calling println() often than concatenating strings together and calling it once?
When doing console output, the real "bottleneck" is the human reader, so don't worry about it. There's nothing you can do to speed that up.
Jun
30
comment How to allow innovation in an Agile Methodology
@Kevin: I originally studied non-software engineering. I think of inventions in those fields - Sterling engines, Wankel engines, turbine engines, transistors, LSI chips, LEDs, numerous forms of aircraft. At the MIT AI Lab, inventiveness was also encouraged, because there are lots of things we don't know how to do, like intelligent learning. I've tried to be inventive in software engineering, resulting in a book, some articles, and some videos. The ratio of negative to positive responses is about an order of magnitude.
Jun
30
comment How to allow innovation in an Agile Methodology
Innovation in software development is not easy regardless of methodology because people are taught (with good reason, I suppose) to stick to the things most people agree on. I think it's because software engineering is not very scientific, compared to other engineering disciplines, in which ideas are judged on their merits, not on their conformism.
Jun
30
comment How to allow innovation in an Agile Methodology
+ I think you've got it. I think the problem is with books that tell people how to do it. (I've found it's very hard to write without making stuff up.) Our team follows "Agile" and what it means is endless meetings. One member simply said "Count me out. It's just the latest fad. If you don't need me, that's fine."
Jun
28
comment get all the combination of a given set of numbers
You might want to get the terminology right. Check out Combinations and Permutations
Jun
27
awarded  Nice Answer
Jun
24
answered Is template “metaprogramming” in Java a good idea?
Jun
23
revised Is there a downside to using AggressiveInlining on simple properties?
grammar grump
Jun
2
comment How can Swift be so much faster than Objective-C in these comparisons?
Caveat Emptor! It all comes down to machine language. There probably are good ideas in Swift, but charts like that are meaningless.
May
29
comment Simplicity-efficiency tradeoff
@sarepta: A group of co-workers is a team - like a little family. There needs to be mutual trust, friendship, and helpfulness. That's more important than programming techniques. I'm sure you know this, so you're doing the right thing. Then, keep your expectations low.
May
29
revised Simplicity-efficiency tradeoff
added 90 characters in body
May
29
answered Simplicity-efficiency tradeoff
May
29
comment How does an optimizing compiler react to a program with nested loops?
I hope you understand that the inner loop is the only one worth optimizing, and only if some computation inside it does almost nothing. Optimizing has benefit in code only to the proportion that the program counter actually spends time in it. Of course, compilers do a lot of unnecessary optimization.
May
15
revised Polling vs events pros and cons in JavaScript
added 6 characters in body
May
15
answered Polling vs events pros and cons in JavaScript
May
13
comment Is lack of whitespace a sign of a cargo cult programmer?
I work with a lot of highly-educated people who write a lot of programs, but are not software engineers. They are full of what we call bad habits. Sometimes I'm able to nudge them into writing stuff that's readable. It's not a concern that they're used to considering. They tend to smile at us with all our pseudo-religions, but when they have to maintain their own code over years, they start to see the value of indentation, spacing, meaningful names, not using the same variable for multiple pusposes, etc. etc.
May
13
comment Does profiling without benchmarking lead to micro-optimization?
@nsfyn55: You're quite right. One case where it did not point to the problem was in a manufacturing simulation where there was an asynchronous protocol between processes, and delays were caused by fast actions being prioritized behind slow ones like DB update. For that, I used a laborious logging method, which worked.
May
7
answered Writing in C for Performance?