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// Finds out the index of a sublist in the original list // Works with nested (grand-parent) sublists. // Does not work with lists not made with subList() (returns -1) // If you use NoIllegalAccesses: Make sure not to use subList(...) // instead of .subList(...) in case you ever call magicIndexOfSubList // on the result. static <A> int magicIndexOfSubList(L<A> list, L<A> sublist) { if (sublist == list) ret 0; ifclass ISubList if (sublist cast ISubList) { L root = sublist.rootList(); int o2 = sublist.subListOffset(); if (list cast ISubList) { if (list.rootList() != root) ret -1; int o1 = list.subListOffset(); ret o2-o1; } else { if (list != root) ret -1; ret o2; } } endif ifndef NoIllegalAccesses Int o2 = cast get(sublist, "offset"); if (o2 == null) ret -1; Int o1 = cast getOpt(list, "offset"); if (true) ret o2-(o1 != null ? o1 : 0); endifndef ret -1; }
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Snippet ID: | #1001832 |
Snippet name: | magicIndexOfSubList |
Eternal ID of this version: | #1001832/13 |
Text MD5: | 8bedfb93982be057eef9d280d6dff4e0 |
Transpilation MD5: | 3bf34ea240ea1e4a38d7eda543ee9cc7 |
Author: | stefan |
Category: | javax |
Type: | JavaX fragment (include) |
Public (visible to everyone): | Yes |
Archived (hidden from active list): | No |
Created/modified: | 2021-07-24 03:07:48 |
Source code size: | 1015 bytes / 35 lines |
Pitched / IR pitched: | No / No |
Views / Downloads: | 562 / 1548 |
Version history: | 12 change(s) |
Referenced in: | [show references] |