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Square root
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| function s(x, y) { | |
| return (y = y/2 || x) * y - x < 1e-9 ? //Check if our approximation multiplied with itself is close enough (within 1e-9) to the input | |
| y : //We're done | |
| s(x, y + x / y) //If we're not close enough, caculate the average of our approximation (which is slightly too high) and the input divided by the approximation (which is slightyl too low) | |
| } |
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| function s(x,y){return(y=y/2||x)*y-x<1e-9?y:s(x,y+x/y)} |
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| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| Version 2, December 2004 | |
| Copyright (C) 2011 YOUR_NAME_HERE <YOUR_URL_HERE> | |
| 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. |
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| { | |
| "name": "simpleSquareRoot", | |
| "description": "A simple implementation of a square root algorithm.", | |
| "keywords": [ | |
| "square", | |
| "root", | |
| "sqrt", | |
| "recursive", | |
| "number" | |
| ] | |
| } |
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| <!DOCTYPE html> | |
| <title>Dumb square root</title> | |
| <div>Expected value: <b>Something like 1.41421</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 s(x,y){return(y=y/2||x)*y-x<1e-9?y:s(x,y+x/y)} | |
| document.getElementById( "ret" ).innerHTML = myFunction(10); | |
| </script> |
I added them.
-2 bytes: function s(x,y){return(y=y/2||x)*y-x<1e-9?y:s(x,y+x/y)}
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keywords: recursive, number