findarg

Find the argument to supply to a function for a target result. | Trouve l'argument à fournir à une fonction pour un résultat cible.

Experimental ! Does not work on chaotic functions !

Usage

import findarg from 'findarg'

const TARGET_RESULT = 9

let argument = findarg(myFunc, TARGET_RESULT)

console.log(argument) // 3 ± 0.001

function myFunc(arg) {
    return arg**2
}

Arguments

Name	Type	Required	Definition
func	Function	yes	Function concerned
targetResult	Number	yes	Target result
options	Object	no	Options to find the target argument faster.

Options

Name	type	Default	Definition
keyResult	String	null	In the case where the function returns an object, this key allows to extract the targeted value.
currentArg	Number	1	Argument whose result is known for the function.
currentResult	Number	1	Known result returned by the function with the aforementioned argument.
currentSlope	Number	1	Slope of the function at the currentArg.
precision	Number	0.001	Precision with which the target must be reached.
maxAttemps	Number	100	Number of tries before abdicating.
isPerfLog	Bolean	false	Log the execution time of the resolution.

Return

Argument giving the target result. If you provided the keyResult option, an object is returned :

{
    argument: Number,
    result: {...} //<== Returned by your function
}

How that work

TODO..