Which D features to emphasize for academic review article

Joseph Rushton Wakeling joseph.wakeling at webdrake.net
Mon Aug 13 05:38:37 PDT 2012


On 13/08/12 11:11, Don Clugston wrote:
> Exactly. I have come to believe that there are very few algorithms originally
> designed for integers, which also work correctly for floating point.

   ////////
     import std.stdio;

     void main()
     {
	    real x = 1.0/9.0;

	    writefln("x = %.128g", x);
	    writefln("9x = %.128g", 9.0*x);
     }
   ////////

... well, that doesn't work, does it?  Looks like some sort of cheat in place to 
make sure that the successive division and multiplication will revert to the 
original number.

> Integer code nearly always assumes things like, x + 1 != x, x == x,
> (x + y) - y == x.

There's always good old "if(x==0)" :-)


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