60 lines
1.5 KiB
EmacsLisp
60 lines
1.5 KiB
EmacsLisp
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;;; math.el --- Math stuffs -*- lexical-binding: t -*-
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;; Author: William Carroll <wpcarro@gmail.com>
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;;; Commentary:
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;; Containing some useful mathematical functions.
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;;; Code:
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Dependencies
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(require 'maybe)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Constants
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defconst math/pi pi
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"The number pi.")
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Functions
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; TODO: Support all three arguments.
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;; Int -> Int -> Int -> Boolean
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(cl-defun math/triangle-of-power (&key base power result)
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;; TODO: Assert two of three are set.
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(cond
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((maybe/some? base power result)
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(error "All three arguments should not be set"))
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((maybe/some? power result)
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(message "power and result"))
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((maybe/some? base result)
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(log result base))
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((maybe/some? base power)
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(expt base power))
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(t
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(error "Two of the three arguments must be set"))))
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(defun math/mod (x y)
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"Return X mod Y."
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(mod x y))
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(defun math/exp (x y)
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"Return X raised to the Y."
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(expt x y))
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(defun math/round (x)
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"Round X to nearest ones digit."
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(round x))
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(defun math/floor (x)
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"Floor value X."
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(floor x))
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(provide 'math)
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;;; math.el ends here
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