The Apache Commons Team is pleased to announce the availability of
version 1.2 of "Apache Commons Numbers".
Apache Commons Numbers provides number types and utilities.
Changes in this version include:
New features:
o NUMBERS-206: "Selection": Add selection of the k-th ordered element
from an array.
o NUMBERS-205: "Addition/Multiplication": Introduces isZero to
Addition and isOne to Multiplication
interfaces. Override the default implementation in
implementing classes to avoid
expensive equals(Object) operations. Thanks to Harald Kirsch.
o NUMBERS-203: "DDField": Add a field for the DD number.
o NUMBERS-193: "DD": Add an extended precision floating-point number.
A double-double (DD) number
is an unevaluated sum of two IEEE double precision numbers
capable of representing
at least 106 bits of significand.
o NUMBERS-192: "Sum": Add subtract(Sum) method.
o NUMBERS-191: "Stirling": Compute Stirling numbers of the first kind.
o NUMBERS-29: Add "Stirling" class to compute Stirling numbers of the
second kind.
Fixed Bugs:
o NUMBERS-204: "Sum": Correct sub-normal round-off computation in sum
of products.
o NUMBERS-201: "FP64": Make equals consistent with hashCode.
o NUMBERS-200: "Sum": Avoid a NaN result when combining Sum instances
with infinite sums
of the same sign. Thanks to Anirudh Joshi.
Changes:
o "ArithmeticUtils": Improve performance of GCD for longs.
Thanks to Matthias Langer.
o "ArithmeticUtils": Improve performance of
remainderUnsigned and divideUnsigned.
Thanks to Sebb, Alex Herbert.
o NUMBERS-199: "Precision": Document inaccurate decimal value
representation when converting
to and from a double in the round method.
Historical list of changes:
https://commons.apache.org/proper/commons-numbers/changes-report.html
For complete information on Apache Commons Numbers, including
instructions on how
to submit bug reports, patches, or suggestions for improvement, see the
Apache Commons Numbers website:
https://commons.apache.org/proper/commons-numbers/
Distribution packages can be downloaded from
http://commons.apache.org/proper/commons-numbers/download_numbers.cgi
When downloading, please verify signatures using the KEYS file
available at
https://downloads.apache.org/commons/KEYS
The Apache Commons Team
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