metadelta / mdlt

A command-line utility for quick math.

mdlt - Metadelta CLI

A command-line utility for quick math.

What is it?

Mdlt is a lightweight command line tool that lets you perform arithmetic and symbolic math operations right from the terminal.

Why this?

Well, nobody wants to boot Python, import SymPy, and type extraneous commands just to find a derivative. And, finding a decent website for math is quite a pain. Mdlt just makes it too easy to do math!

How do I get started?

To install mdlt, simply run:

npm i -g mdlt

That's it! Now you can begin implementing Metadelta's powerful functionality right from the terminal!

Okay and how do I use it?

Commands are formatted as such:

mdlt [operation] [expression]

Which means that you'd like metadelta to perform the given operation on the following expression.
An example of this is:

mdlt derive x^2

which returns: 2 x. Note: for more reliable processing, wrap the expression in double quotes.
For more commands, Mdlt's documentation can be found here.

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Built using metadelta Licensed under the GNU GPLv3 license.

Copyright (C) 2017  Gerald Nash

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

mdlt's Issues

can't pipe into mdlt

echo "simplify 1 + 1" | mdlt does not work.

Incorrect error code

The error code the program returns appears to always be 0, even in the case of fault. An example session:

╰─➤  mdlt 'x' 'x'
Improper format.

Usage:
mdlt [operation] [expression]
OR
mdlt [operation] "[expression]"

╰─➤  echo $?
0

Which is making it quite difficult to automatically tell when it fails... ^.^;

zeroes function returning incorrectly

$ mdlt zeroes x^2 - 14x + 4
[7, 7] # wrong
$ mdlt zeroes x^2 - 14x + 3
[7, 7] # wrong
$ mdlt zeroes "x^2 - 15x - 1932847239"
[-15, 15] # wrong

Not sure what's going on here...

No compatible version found: @metadelta/solver@^1.0.0

npm install -g mdlt
npm ERR! code ETARGET
npm ERR! notarget No compatible version found: @metadelta/solver@^1.0.0
npm ERR! notarget Valid install targets:
npm ERR! notarget 2.0.1