On Sun, 21 Jul 2013 20:40:42 -0700, Phil Steitz wrote:
I would like to use getNatural and shuffle from RandomDataGenerator
outside of that class (inside [math] I need to efficiently generate
random n-m partitions of {0, ..., n + m - 1}). I think getNatural
could go into MathArrays and shuffle could just be exposed by
RandomDataGenerator. Any objections to making these public? (I
promise to rewrite the javadoc for getNatural so it makes sense to
non-logicians and I would even be OK with renaming it ;)
"shuffle" could probably be useful in other contexts too. Various
versions could also be defined in "MathArrays":
---CUT---
public enum Position {
/** Designates the beginning of the array (near index 0). */
HEAD,
/** Designates the end of the array. */
TAIL
}
public static void shuffle(int[] list,
int start,
Position pos,
RandomGenerator rng) {
// ...
}
---CUT---
And "double" versions:
---CUT---
public static void shuffle(double[] list,
int start,
Position pos,
RandomGenerator rng) {
// ...
}
---CUT---
And obvious overloads: e.g.
---CUT---
public static void shuffle(double[] list, RandomGenerator rng)
public static void shuffle(double[] list)
---CUT---
The method in RandomDataGenerator would become a client:
---CUT---
private void shuffle(int[] list, int end) {
MathArrays.shuffle(list, MathArrays.Position.TAIL, end,
getRandomGenerator());
}
---CUT---
Regards,
Gilles
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