Favorite presentations from Prezi:
.prezi-player { width: 550px; } .prezi-player-links { text-align: center; }
Math is not linear on Prezi...
Wednesday, April 13, 2011
Sunday, April 10, 2011
Arc
A new dialect of Lisp
http://arclanguage.org
Quote:
"Arc is designed for exploratory programming: the kind where you decide what to write by writing it. A good medium for exploratory programming is one that makes programs brief and malleable, so that's what we've aimed for. This is a medium for sketching software.Arc is unfinished. It's missing things you'd need to solve some types of problems. But it works well for basic web apps.
The first priority right now is the core language. We're trying to continue McCarthy's axiomatic approach all the...
Thursday, April 7, 2011
Performance of comparing arrays
For the test I have used 2.3 mb file, being read to a byte array before all tests, and each test is run 100 times.
Release, ms
Debug, ms
MemCmp and UnsafeBytesCompare8Step are the fastest
UnsafeBytesCompareMs is used in .NET to compare Strings.
Performance of MemCmpFromPtr is as much as the MemCmp performance if initializing of IntPtr
is implemented outside the function.
MemCmp uses memcmp
Source code...
Tuesday, April 5, 2011
Python resource and extensions
Tutorials:
docs.python.org/py3k/tutorial
diveintopython.org
python.org
code.activestate.com/recipes
http://openbookproject.net/py4fun
Installing:
http://webnewage.org/2009/06/23/what-is-pip
http://pypi.python.org/pypi/distribute#distribute-setup-py
http://pypi.python.org/pypi/pip
http://pypi.python.org/pypi/setuptools#files
http://www.komtet.ru/lib/plangs/python/easy-install-zagruzka-i-ustanovka-paketa
http://www.crummy.com/software/BeautifulSoup/#Download
http://peak.telecommunity.com/DevCenter/EasyInstall#installing-easy-install
http://stackoverflow.com/questions/1213690/what-is-the-most-compatible-way-to-install-python-modules-on-a-mac
http://stackoverflow.com/questions/452283/how-can-i-install-the-beautiful-soup-module-on-the-mac
Sources:
http://developer.berlios.de/softwaremap/trove_list.php?form_cat=76
Extensions:
http://pypi.python.org
1....
Harshad numbers
http://www.harshad-numbers.com
http://en.wikipedia.org/wiki/Harshad_number
http://en.wikipedia.org/wiki/1729_(number)
Inverse Symbolic Calculator
P.S. Infinity
Online encyclopedia of integer sequences
http://offline.computerra.ru/print/offline/1998/235/1098
Examples:1. A019460: 2, 3, 3, 5, 10, 13, 39, 43, 172, …
2. A006567: 13, 17, 31, 37, 71, 73, 79, 97, 107, …
3. A001462: 1, 2, 2, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 6, …
4. A005228: 1, 3, 7, 12, 18, 26, 35, 45, 56, 69, …
5. A006751: 2, 12, 1112, 3112, 132112, 1113122112, …
6. A004000: 1, 2,...
Monday, April 4, 2011
Computer science studies and top CS blogs
http://icme.stanford.eduhttp://comptop.stanford.eduhttp://www-cs.stanford.edu
http://www.mastersincomputerscience.net/top-50-computer-science-blogs.html
http://www.mastersincomputerscience.net/blog.h...
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