1 | // Allows to vary the order by supplying a seed |
2 | // |
3 | // We add the seed to every LSFR value generated, and also start |
4 | // the LSFR with the seed. |
5 | |
6 | sclass WeightlessShuffledIteratorWithSeed<A> extends WeightlessShuffledIterator<A> {
|
7 | final int cycleLength, offset; |
8 | |
9 | // initialize only with a length (and a pseudo-list) |
10 | // if you are going to be calling nextIndex() instead of next() |
11 | *(int n) {
|
12 | this((L) virtualNullList(n)); |
13 | } |
14 | |
15 | *(int n, int seed) {
|
16 | this((L) virtualNullList(n), seed); |
17 | } |
18 | |
19 | *(L<A> list) {
|
20 | this(list, 0); |
21 | } |
22 | |
23 | *(L<A> list, int seed) {
|
24 | super(list); |
25 | if (lsfr == null) { cycleLength = offset = 0; ret; }
|
26 | lsfr.start(seed); |
27 | cycleLength = lsfr.cycleLength(); |
28 | offset = lsfr.value-1; |
29 | printVars ifdef WeightlessShuffledIterator_debug(+seed, +cycleLength, +offset, start := lsfr.value); |
30 | } |
31 | |
32 | int postProcessLSFRValue(int i) {
|
33 | i += offset; |
34 | ret i >= cycleLength ? i-cycleLength : i; |
35 | } |
36 | } |
Began life as a copy of #1035207
download show line numbers debug dex old transpilations
Travelled to 3 computer(s): bhatertpkbcr, mowyntqkapby, mqqgnosmbjvj
No comments. add comment
| Snippet ID: | #1035214 |
| Snippet name: | WeightlessShuffledIteratorWithSeed (working backup with external LSFR) |
| Eternal ID of this version: | #1035214/1 |
| Text MD5: | 8b116a2d0e25f7ee3dc2b59831cc87e9 |
| Author: | stefan |
| Category: | javax |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2022-04-15 17:25:19 |
| Source code size: | 990 bytes / 36 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 84 / 90 |
| Referenced in: | [show references] |