Golang RPN calc

DEPRECATED

See https://github.com/leucos/grpn instead.

Simple yet efficient terminal RPN calcultator.

Installation

Binary

Grab a release.

From sources

Using Go 1.11:

export GO111MODULES=on
git clone https://github.com/leucos/gorpn
cd gorpn
go install

Supported ops

• +, -, *, /, %
• pow, ^ (e.g. 2⏎3⏎pow⏎ yields 8), sqrt
• sin, cos, tan, asin, acos, atan,
• abs, ceil, floor, round, trunc (e.g. 3.14159⏎2⏎trunc⏎)
• rad, deg for angle modes
• dup (a.k.a empty input and ⏎) duplicates last stack item
• swap exchanges last 2 items in the stack
• drop removes last item in the stack
• pi, phi constants
• precision, # (e.g. 2⏎precision⏎ or ``2⏎#⏎`) limits number of displayed digits
• cu1_cu2 returns exchange rate between cu1 and cu2 (e.g. isk_eur for xchange rate between ISK and EUR)
• quit or <ESC> exists gorpn
• <UP>/<DOWN> key walks input history up or down

Mode is shown in the bottom line. If an error occurs, a red E will show at the bottom right corner.

TODO

• undo
• non-intercative mode support (stdin / stdout)
• sentence recall (vs token recall) with PgUp/PgDown
• stack save on exit / load on start
• completion

Licence

DWTFYWPL

Authors

@leucos

Inspired by https://medium.com/@jhh3/anonymous-functions-and-reflection-in-go-71274dd9e83a