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- DropWhile - StringTake with argument that do not generate an error if the string is too short - StringStartsWithQ some version of Row and Column that have the same syntax and options, or an tutorial explaining why they don't  
one way is to keep the expression of the student in a "Hold" or "HoldComplete" and then look for any of those function in the expression. you can that way make a "secure"  version of ToExpression. If notebooks I meant to be run completely, there is...
Todor, It is not clear from your post what you are trying to optimize... rather than jumping on the code, can you try to explain your problem further? Are you trying to figureout how to move all the files on a minimal number of DVDs? Luc
Simon, Animal swarm: it could be you saw the original flock study which was done by my friend Craig Reynolds: http://www.red3d.com/cwr/boids/ and published in SIGGRAPH 1987... [img=width: 279px; height:...
I believe the input for a 7.1 surround sound system consists only of a left and right channel. The phase and amplitude between the same frequencies on both channels determines where the sound is played in final in the 7.1 system. For example same...
Asad, In this case you probably want "factor 3^2*3^6" which return 3^8 For such questions however, you might want to start to use Mathematica instead, as it will...
Very nice!
I have done a lot of webMathematica development...
Pete, If you can share a few images as example of what you want to compare, you might get help from the community to accelerate your project.
Here is what I am talking about : [mcode]Cell[StyleData["ItemNumbered"], CellDingbat->Cell[   TextData[{   ...