Sunday, 2 November 2008


I don't send you the definition of the function, you would not find it
interesting.


       2oo
       ---
       \         ___
F(X) = /   cos ( //  * ( floor ( X / P ) + P ) )
       ---
       P=1


2oo represents double infinity.

To better interpret this message you should render it with a fixed-width font.
However I provide an ECMA-262 definition, too.


var F
F = function ( X )
{
    var P
    var Quantity
    var Value
    Value = 0
    Quantity = X + ( X & 1 )
    for ( P = 1 ; P <= Quantity ; ++ P )
        Value += Math . floor ( X / P ) + P & 1 ? -1 : 1
    return Value
}


Ciao.