What's New - January, 2006
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January 28,2006: Charles Doumars, who's hobby is making my code better, has enhanced the TPrimes unit to handle primes up to 18 digits in length and do it rather efficiently both for finding prime factors and testing numbers for "primeness". I've modified Primefactors1 to let you enter and factor the new larger numbers. It identifies the 18 digit number 123,456,789,123,456,773 as prime in just under a minute on my laptop.
January 23, 2006:
Inverted
Text,
Mirror text, Or Both?
A previous program illustrating techniques for
inverting and/or mirroring text moved one step closer to being a
usable teleprompter program today with the addition of a
full-screen capability for the transformed text. TestInverted_MirroredText
V2 also adds ability to load text files and print multiple
pages. I've never seen a real teleprompter and don't
intend to compete with commercial software, but perhaps some
high school communications class with the need and a tight
budget will find it useful. If not, let me know why
not.
January
20, 2006: I finally got around to incorporating
some requested enhancements to make Cutlist
Version 3.1. Cutlist is a program for
woodworkers which takes a list of required parts, a list
of supply material, and tries to figure out the best way to cut
the required parts from the available
material.
January 12, 2006: A viewer recently pointed out to me that the proposed revision to the wind-chill equation had been implemented, apparently shortly after my original positing in early 2001. The new equation is based on enhanced models of the effect of wind of exposed skin and verified by experimental results. A new version of Windchill was posted today which reports results based on both the old and new equations.
January 10, 2006: Charles Doumar has made a few enhancements and fixed a few minor bugs in our large integer integer class, TInteger, in UBigIntsV2 unit and distributed as part of the DFF Library zip file, DFFLIBV04. The more information and the test file for the class can be downloaded from the Big Integers test program page.
January 9, 2006: I posted a new version of the TPrimes class today which has added methods to get the prime factors of a number in canonical form (unique factors and the number of times they occur) as well as a method to return the number of divisors and one to return an array of all divisors of any number up one trillion (1,000,000,000,000). Program Prime Factors 1 now has buttons to test these new methods.