mochinum
Useful numeric algorithms for floats that cover some deficiencies in the math module.
Useful numeric algorithms for floats that cover some deficiencies in the math module. More interesting is digits/1, which implements the algorithm from: http://www.cs.indiana.edu/~burger/fp/index.html See also "Printing Floating-Point Numbers Quickly and Accurately" in Proceedings of the SIGPLAN '96 Conference on Programming Language Design and Implementation.
Functions
digits(N::number()) -> string()
Returns a string that accurately represents the given integer or float using a conservative amount of digits. Great for generating human-readable output, or compact ASCII serializations for floats.
frexp(F::float()) -> {Frac::float(), Exp::float()}
Return the fractional and exponent part of an IEEE 754 double, equivalent to the libc function of the same name. F = Frac * pow(2, Exp).
int_ceil(F::float()) -> integer()
Return the ceiling of F as an integer. The ceiling is defined as F when F == trunc(F); trunc(F) when F < 0; trunc(F) + 1 when F > 0.
int_pow(X::integer(), N::integer()) -> Y::integer()
Moderately efficient way to exponentiate integers. int_pow(10, 2) = 100.