My best J experience has been obtaining a concrete representation of multivariable polynomials:
x o x o ... o x o A evaluates a homogeneous multivariable polynomial with coefficient the symmetric matrix A. There are n x's, o is +/ . * and the evaluation is quite like a * x^n for one term of a scalar polynomial. I remember the forum helped formulate a simple test for an array being symmetric; seeing that happen was part of what made the enterprise a best experience. Kip Anssi Seppälä wrote: > Hi guys, > What are your best J experiences? What was the case when you really felt > that you have the force in your finger tips? Tell us when you beat a > x-programmer by a simple J line? > > My best J experience was the easy move to 64bit computing. > I feel the force in my finger tips when I use the numbered locales (OO way) > and mapped files. > I beat a C# programmer when checking if rows of any-size-of-table are also > rows in another any-size-of-table. > > Anssi > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
