NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Calculators "old technology"
From: Roger W. Sinnott
Date: 2020 Apr 30, 19:09 +0000
From: Roger W. Sinnott
Date: 2020 Apr 30, 19:09 +0000
Funny this topic should come up! When I got an iPad several years ago, I was bummed that it did not come with a built-in calculator app (as does the iPhone and most desktop operating systems).
I didn't want to pay for such an app, and I did not like all the pop-up ads that come with the free calculator apps out there. So I wrote my own in Javascript and put it on my website: http://carpathiapress.com/Calc.htm My iPad now has an icon on the home screen that links to it directly. The app even includes haversine and archav keys for CelNav.
One feature I appreciate is that it retains a sequence of +-*/ operations on the display, allowing easy proofreading before I hit the = key. There are a few idiosyncrasies to be aware of. The function keys don't work on a sequence, but only when the display shows a single result. Also, when entering a negative number, the negative sign in the lower-left corner is to be pressed AHEAD of the digits (just as we do when writing on a pencil and paper).
Roger
I didn't want to pay for such an app, and I did not like all the pop-up ads that come with the free calculator apps out there. So I wrote my own in Javascript and put it on my website: http://carpathiapress.com/Calc.htm My iPad now has an icon on the home screen that links to it directly. The app even includes haversine and archav keys for CelNav.
One feature I appreciate is that it retains a sequence of +-*/ operations on the display, allowing easy proofreading before I hit the = key. There are a few idiosyncrasies to be aware of. The function keys don't work on a sequence, but only when the display shows a single result. Also, when entering a negative number, the negative sign in the lower-left corner is to be pressed AHEAD of the digits (just as we do when writing on a pencil and paper).
Roger
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