Bitvectors and rank/select

[@kenway346]

I am thankful for finding this channel.. algorithms in the MS-CS program would've been impossible otherwise!

[@JP-mx3ri]

There's a small mistake:
B.select(B.rank(i) - 1) is actually not "current or previous bit" but "previous bit" (=).
If one wanted to achieve current or previous bit one could use
B.select(B.rank(i) - (1 - B.access(i)))

[@imadudin2489]

finally back !!!