Stack Calculator Cli

Quickstart

You can install this package and run it with npx

~ npm i -g stack-calc
~ npx stack-calc

Basics

Numbers

Each number you type is pushed to the stack from left to right

> 2 2.5 -.5
stack: [2, 2.5, -0.5]

Operations and functions

Operations, Functions etc. take arguments by popping numbers from the stack

Plus '+' will pop two numbers and push their sum

> 2 2 +
stack: [4]

Intrinsics

There are also intrinsics which don't represent any mathematical operations, but just affect the stack

> 2 dup
stack: [2, 2]

Macros

Macros are a set of statements combined in one word. You can define a macro by starting your command with ! symbol.

> !PI 3.1415
> !log2 2 swap log

After that these macros will be saved and you will be able to use them

> 8 log2
stack: [3]

log2 will expand to 2 swap log and as the result the "equation" will look like this: 8 2 swap log

You can preload your macros in json file with -m or --macro flag node cli.js --macro macrostest.json

Additional commands

These are commands which you can type instead of equations

:d or :debug - switches debug mode

:m or :macros - prints out all defined macros

> :macros
Macros:
    PI -> 3.1415
    log2 -> 2 swap log

List of everythin

Operators

+ - sums two numbers 2 2 + -> 4

- - stubtracts numbers 3 2 - -> 1

* - multiplies numbers 3 2 * -> 6

/ - devides numbers 3 2 / -> 1.5

// - devides numbers and floors the result 3 2 // -> 1

% - modulus of numbers 3 2 % -> 1

Intrinsics

dup - duplicates the last number on the stack 2 dup -> 2 2

drop - drops the last number on the stack 2 2 drop -> 2

swap - swaps last two numbers on the stack 1 2 swap -> 2 1

over - duplicates the number before the last one 2 1 over -> 2 1 2

Functions

sqrt - square root 4 sqrt -> 2

sin - sinus 3.1415 2 / sin -> 0.999...

cos - cosinus 3.1415 cos -> -0.999...

tan - tangens 3.1415 4 / tan -> 0.999...

ctan - cotangens 3.1415 4 / ctan -> 1.000...

asin - arcsin 1 asin 2 * -> 3.1415...

acos - arccos 1 acos -> 0

atan - arctan 1 atan -> 0

log - logarithm 2 8 log -> 3

ln - natural logarithm 2.7 ln -> 0.9932...

fact - factorial 5 fact -> 120

pow - power 2 4 pow -> 16

root - root 8 3 root -> 2