org.saddle.util

Provides a way to append two arrays of possibly different types together by intelligently promoting primitive types where possible.

Key method is Concat.append(array1, array2)

An Order[Double] instance which produces a total order by ordering NaNs above all other Doubles

Contrary to the specification of cats, the DoubleOrdering in cats.kernel is not total because NaN is not ordered (all comparisons return false). This behaviour is consistent with IEEE-754, but not very practical.

java.lang.Double.compare orders NaN to be largest of all Doubles.

See https://github.com/scala/scala/pull/8721 See https://github.com/scala/scala/blob/39e82c3f904380f0b40d106723747faf881640d4/src/library/scala/math/Ordering.scala#L465

See DoubleTotalOrder

This class implements mutable maps with Long keys based on a hash table with open addressing.

Basic map operations on single entries, including contains and get, are typically substantially faster with LongMap than HashMap. Methods that act on the whole map, including foreach and map are not in general expected to be faster than with a generic map, save for those that take particular advantage of the internal structure of the map: foreachKey, foreachValue, mapValuesNow, and transformValues.

Maps with open addressing may become less efficient at lookup after repeated addition/removal of elements. Although LongMap makes a decent attempt to remain efficient regardless, calling repack on a map that will no longer have elements removed but will be used heavily may save both time and storage space.

This map is not intended to contain more than 2^29 entries (approximately 500 million). The maximum capacity is 2^30, but performance will degrade rapidly as 2^30 is approached.

Creates a string out of ''count'' number of elements extracted from ''total'' elements between offsets [0 ... count / 2) and (total - count / 2 ... total), using a callback that generates a string at each offset, and inserting a break string if count > total.

Takes n elements from the front and from the back of array