On Sat, 25 Jun 2016 15:01:14 +0100, Stian Soiland-Reyes wrote:
+0
The big mix of stuff here makes it feel like Commons Math Lite,
Hmm, no; it's certainly more akin to... Commons Lang, but
more focused (on numerical utilities) and much leaner!
Actually, the big code chunk is, by far, "FastMath", which
is an almost drop-in replacement for the JDK's "Math" class.
It is thus very high on the scale of "stability" (read: API
is as stable as the JDK).
The lines of code counts are:
FastMath (and helper): ~8800
dfp: ~2800
*all the rest*: ~2350
The common denominator is: very low-level utilities (static
methods, no OO!).
Maintenance cost of this component should be very low.
Also, its contents is sometimes _used_ by other parts of CM,
but it is also, from a certain POV, much more specialized: the
"unlimited" precision functionality is not needed by applications
in domains where either the accuracy (of the "input") is much
lower than "double" precision or the performance hit incurred is
not worth it.
In "all the rest", there are many useful little things that are
also pretty much in a "final" state (review is certainly welcome
before release).
In fact, this component would really deserve the name "Commons
Math"! [While the actual "Commons Math" is a hodgepodge of
codes that should have belonged to different modules.]
Gilles
so I would
not decide on this before the Math TLP/Incubator route is settled (or
abandoned).
On 21 Jun 2016 8:30 p.m., "Gilles" <gil...@harfang.homelinux.org>
wrote:
Hello.
This is one of several votes for establishing new Commons components
out of functionality developed inside the "Commons Math" component.
This vote is dedicated to the following functionality:
Standard mathematical functions (either missing from
"java.lang.Math",
or faster or more accurate than their counterpart in the JDK) and
floating point utilities.
The concerned code is the contents of the following classes and
packages:
org.apache.commons.math4.Field
org.apache.commons.math4.FieldElement
org.apache.commons.math4.RealFieldElement
org.apache.commons.math4.util.FastMath (and helper classes)
org.apache.commons.math4.util.Precision
org.apache.commons.math4.util.MathUtils
org.apache.commons.math4.util.ArithmeticUtils
org.apache.commons.math4.util.Combinations
org.apache.commons.math4.util.CombinatoricsUtils
org.apache.commons.math4.util.ContinuedFraction
org.apache.commons.math4.dfp
org.apache.commons.math4.special
located in the "develop" branch of Commons Math:
https://git1-us-west.apache.org/repos/asf?p=commons-math.git;a=tree;f=src/main/java/org/apache/commons/math4/util;h=c54f99f943f758e43ebeb54d8771a6ef6516d283;hb=refs/heads/develop
https://git1-us-west.apache.org/repos/asf?p=commons-math.git;a=tree;f=src/main/java/org/apache/commons/math4/special;h=b8fb8b1f6e29a549d0716c866939e074525246a1;hb=refs/heads/develop
Notes:
* This component will have no dependency.
* Code size: ~13000 lines of code (unit tests not included).
[Out of which ~6000 lines are literal numbers defined in
class "FastMathLiteralArrays".]
* API: stable. [But some of it should probably be moved into
an "internal" package.]
* Estimated minimum Java version: 5
All are welcome to vote, especially potential users of the candidate
component and people who'd like to contribute to it, through user
support,
bug-fixes and enhancements, documentation, release management.
[ ] +1, this would be a valid Commons component.
[ ] -1, this won't be a good Commons component because ...
Thanks,
Gilles
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