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rpnCalc is a reverse polish notation (RPN) calculator. The stack behavior is based, rather loosely, on the HP-28S. I originally wrote it because the battery on my HP-28S died and I needed a calculator. Yes, I suppose I could have bought a new battery. But instead I wrote an HTML/Javascript/CSS RPN calculator; partly out of need, and partly as an exercise in Javascript.

What's New

Version 1.6.1:
  • Fixed a bug whereby if a HEX value contained a single 'E' and no other non-numeric characters, it was being converted to a exponential number.

Requirements

Mac OS X 10.4 or later

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rpnCalc User Discussion

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Anonymous Member IconReview
Anonymous
+0

Nice.

But what does the "e" key do? I expected it to enter an exponent. But when I press it, it puts an "e" into the number, but the insertion point does not go into the exponential.

Of course, you can type "6.02e23" with the keyboard "e".

Reply2 replies
Version 1.3
Anonymous Member Icon
Anonymous
+0

Yeah, I noticed this a while ago and it's really annoying, but I can't figure out how to keep Safari from doing this. Basically, once you start using the buttons in the interface, it moves the cursor to the start of the number entry field (instead of the end). If you only use the buttons in the interface, this is not an issue. For example, you should be able to type 6.02e23 using the buttons in the interface without any issue. The problems arise when you try to go back and forth from the keyboard to the buttons in the interface.

If anyone knows of a fix for this (and I've already tried giving the entry element the focus in javascript), let me know and I'd be happy to fix it.

--Rick

Krystof Vasa
+0

e isn't for exponent. It is a constant used when solving exponential equations.

Anonymous Member IconReview
Anonymous
+0

Works quite well. Very useful little tool!

Reply0 replies
Version 1.3
Anonymous Member IconReview
Anonymous
+0

I like the idea of this as my preference is for RPN, but x^ y is very awkward. HP norm is y^x.

Reply2 replies
Version 1.2.1
Rick Lansky (Developer)
+0

Yeah, you're right. Version 1.2.2 has fixed this problem.

--Rick

Anonymous Member Icon
Anonymous
+0

for y^x try
http://www.macupdate.com/info.php/id/6125

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Current Version (1.x)
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Details

Downloads 6,691
Version Downloads 2,783
License Free
Date 15 Dec 2006
Platform OS X / PPC 32 / Intel 32
Price Free
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