srifqi/LICENSE.txt

## README.md

      
    Raw
  

              README.md
            
          
    140byt.es

A tweet-sized, fork-to-play, community-curated collection of JavaScript.
Quadratic Formula Solver

Quadratic formula

  -b ± Math.sqrt(Math.pow(b,2) - 4*a*c)
  -------------------------------------
                  2*a

Usage

var solve = function(a,b,c){c=Math.sqrt(b*b-4*a*c);return[(c-b)/(2*a),(-b-c)/(2*a)]};
solve(1,2,-8); // returns [2,-4]

  
## annotated.js
/* Quadratic formula
 * -b ± Math.sqrt(Math.pow(b,2) - 4*a*c)
 * -------------------------------------
 *                 2*a
 */
/* a, b, c are from equation with format:
 * ax^2 + bx + c = 0
 */
function(a,b,c){

	/* save the Math.sqrt(Math.pow(b,2) - 4*a*c) in c
	 * so, the formula being:
	 * - b ± c
	 * -------
	 *   2*a
	 */
	c=Math.sqrt(b*b-4*a*c);
	// note the ± after the b variable
	return[
		( c-b)/(2*a),	// ± -> positive (note that -b+c => c-b)
		(-b-c)/(2*a)	// ± -> negative
	]
};

## index.js
function(a,b,c){c=Math.sqrt(b*b-4*a*c);return[(c-b)/(2*a),(-b-c)/(2*a)]};

## LICENSE.txt
            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 Muhammad Rifqi Priyo Susanto srifqi.github.io

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

## package.json
{
  "name": "quadraticFormulaSolver",

  "description": "Solve and return the results using quadratic formula",

  "keywords": [
    "quadratic",
    "formula",
    "solver",
    "math"
  ]
}

## test.html
<!DOCTYPE html>
<title>Foo</title>
<div>Expected value: <b>2,-4</b></div>
<div>Actual value: <b id="ret"></b></div>
<script>
  // write a small example that shows off the API for your example
  // and tests it in one fell swoop.

  var myFunction = function(a,b,c){c=Math.sqrt(b*b-4*a*c);return[(c-b)/(2*a),(-b-c)/(2*a)]};

  document.getElementById( "ret" ).innerHTML = myFunction(1,2,-8).join();
</script>
	/* Quadratic formula
	* -b ± Math.sqrt(Math.pow(b,2) - 4ac)
	* -------------------------------------
	* 2*a
	*/
	/* a, b, c are from equation with format:
	* ax^2 + bx + c = 0
	*/
	function(a,b,c){

	/* save the Math.sqrt(Math.pow(b,2) - 4ac) in c
	* so, the formula being:
	* - b ± c
	* -------
	* 2*a
	*/
	c=Math.sqrt(bb-4a*c);
	// note the ± after the b variable
	return[
	( c-b)/(2*a), // ± -> positive (note that -b+c => c-b)
	(-b-c)/(2*a) // ± -> negative
	]
	};
	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	Version 2, December 2004

	Copyright (C) 2011 Muhammad Rifqi Priyo Susanto srifqi.github.io

	Everyone is permitted to copy and distribute verbatim or modified
	copies of this license document, and changing it is allowed as long
	as the name is changed.

	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

	0. You just DO WHAT THE FUCK YOU WANT TO.
	{
	"name": "quadraticFormulaSolver",

	"description": "Solve and return the results using quadratic formula",

	"keywords": [
	"quadratic",
	"formula",
	"solver",
	"math"
	]
	}
	<!DOCTYPE html>
	<title>Foo</title>
	<div>Expected value: <b>2,-4</b></div>
	<div>Actual value: <b id="ret"></b></div>
	<script>
	// write a small example that shows off the API for your example
	// and tests it in one fell swoop.

	var myFunction = function(a,b,c){c=Math.sqrt(bb-4ac);return[(c-b)/(2a),(-b-c)/(2*a)]};

	document.getElementById( "ret" ).innerHTML = myFunction(1,2,-8).join();
	</script>