Programmering i Ruby

Den Pragmatiske Programmerers Veiledning
Forrige < Innhold ^
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modulen Math

Indeks:

atan2 cos exp frexp ldexp log log10 sin sqrt tan

The Math module contains module functions for basic trigonometric and transcendental functions.

konstanter

E 2.718281828 Value of e (base of natural logarithms)
PI 3.141592654 Value of PI

klassemetoder
atan2 Math.atan2( y, x ) -> aFloat

Computes the arc tangent given y and x. Returns -PI..PI.

cos Math.cos( aNumeric ) -> aFloat

Computes the cosine of aNumeric (expressed in radians). Returns -1..1.

exp Math.exp( aNumeric ) -> aFloat

Returns e raised to the power of aNumeric.

frexp Math.frexp( aNumeric ) -> anArray

Returns a two-element array ([aFloat, aFixnum]) containing the normalized fraction and exponent of aNumeric.

ldexp Math.ldexp( aFloat, anInteger ) -> aFloat

Returns the value of aFloat *2 anInteger .

log Math.log( aNumeric ) -> aFloat

Returns the natural logarithm of aNumeric.

log10 Math.log10( aNumeric ) -> aFloat

Returns the base 10 logarithm of aNumeric.

sin Math.sin( aNumeric ) -> aFloat

Computes the sine of aNumeric (expressed in radians). Returns -1..1.

sqrt Math.sqrt( aNumeric ) -> aFloat

Returns the non-negative square root of aNumeric. Raises ArgError if aNumeric is less than zero.

tan Math.tan( aNumeric ) -> aFloat

Returns the tangent of aNumeric (expressed in radians).

Forrige < Innhold ^
Neste >

Extracted from the book "Programming Ruby - The Pragmatic Programmer's Guide".
Translation to norwegian by Norway Ruby User Group.
Copyright for the english original authored by David Thomas and Andrew Hunt:
Copyright © 2001 Addison Wesley Longman, Inc.
This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at
http://www.opencontent.org/openpub/).

(Please note that the license for the original has changed from the above. The above is the license of the original version that was used as a foundation for the translation efforts.)

Copyright for the norwegian translation:
Copyright © 2002 Norway Ruby User Group.
This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at
http://www.opencontent.org/openpub/).
Distribution of substantively modified versions of this document is prohibited without the explicit permission of the copyright holder.
Distribution of the work or derivative of the work in any standard (paper) book form is prohibited unless prior permission is obtained from the copyright holder.