Created
January 14, 2015 20:21
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Root calculator using Newton's Method
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function pow( number, degree ) { | |
var memo = 1; | |
while( degree-- ) { | |
memo *= number; | |
} | |
return memo; | |
} | |
function root( number, degree, iterations, guess ) { | |
//Via Newton's method | |
if( iterations === 0 ) return guess; | |
if( typeof guess !== "number" ) guess = number / 2; | |
var f = ( pow( guess, degree ) - number ); | |
var df = ( degree * pow( guess, degree - 1 ) ); | |
return root( number, degree, iterations - 1, | |
guess - f / df | |
); | |
} |
That would be quite nice! But, but, coffeescript.
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Excited about ES6 having default arguments?
function root(number, degree, iterations, guess = number / 2);
Already available in coffee... :D