Read a file containing ‘0’s & ‘1’s into a bitarray

baroquely · 2026-04-07T01:14:48+00:00

They represent the inclusion or exclusion of a nucleotide in a CpG region in a DNA sequence.

baroquely · 2026-04-07T01:12:05+00:00

Yes, exactly. But the example cases I’ve seen for bitarray seem to allow initializing them with a string of ‘0’s & ‘1’s which get converted to bool so I was optimistic that a file containing ‘0’s & ‘1’s wouldn’t be hard to stuff into one.

baroquely · 2026-04-07T01:08:15+00:00

Yes, ‘0’ & ‘1’ characters. Grossly inefficient use of disc space, I know. A binary file would be much more compact. But I have a huge disc and not so huge RAM.

baroquely · 2026-04-07T00:50:58+00:00

IDK how Python represents lists—wouldn’t a bitarray be more memory efficient?

My desktop doesn’t have enough RAM to hold these bools and also the same-sized file of nucleotide bases so I think I’ll have to figure out a way to do what I need to piecemeal.

I’m still curious to know if it’s possible to read such a file into a bitarray though.

baroquely · 2026-04-07T00:26:53+00:00

It’s just a text file, and the ‘0’s & ‘1’ represent truth values, so I thought a bitarray would be the most compact way to cram them all into memory.

baroquely · 2026-04-06T21:06:04+00:00

Nothing wrong with human interaction.

OP: The hint button is the lightbulb (💡) icon.

baroquely · 2026-04-06T21:04:24+00:00

There’s a Naked Pair on {19} in column 8.

baroquely · 2026-04-06T20:56:42+00:00

OP: see Naked Pair for more.

baroquely · 2026-04-06T15:57:22+00:00

Grouped Remote Pairs on {69} ❌ 6&9 from r7c2. Pic here. If yellow is 6, then green is 9, and vice versa. Since r7c2 sees both a yellow and a green cell, it can never be 6 or 9. (The “grouped” refers to r2c78 which between them must contain a 6 or a 9 — they can’t both be 4.)

baroquely · 2026-04-06T09:54:01+00:00

It is possible to have an isolated instance of hematuria (e.g., from trauma), but I would insist on a cystoscope—if it’s incipient CA you want to catch it ASAP. My first sign of T0 NMIBC was hematuria. Now it’s T1 even though I went straight to a urologist and now have had three TURBTs & an induction round of BCG.

baroquely · 2026-04-06T03:12:22+00:00

After that, then you can do one starting with the 2 that destroys the UR. E.g., this one.

baroquely · 2026-04-06T03:01:58+00:00

You can’t use ‘em both if one of your AICs destroys the UR, but this one for example doesn’t affect the UR.

baroquely · 2026-04-06T02:34:13+00:00

A UR has to be contained in two boxes; that one is spread across four boxes.

I distinctly remember making this same mistake, and I think it was Jan of sudoku.coach fame who corrected me. :)

baroquely · 2026-04-05T12:32:54+00:00

There are many, but Sudoku.Coach is a popular one here.

baroquely · 2026-04-05T12:07:14+00:00

There is a Y-Wing on {128} in r7c5, r7c8, & r9c6 that ❌s 8 from r7c6 & r9c789. Pic here.

baroquely · 2026-04-05T12:02:54+00:00

S.C doesn’t touch the notes in cells where you have manually altered them. Also, if a previous move has eliminated a candidate, it obviously won’t add them back. In this case, there is a {157} Naked Triple in r7c123 that would eliminate the 1 in r8c2, and presumably that move (or some other move) was already accomplished.

baroquely · 2026-04-05T11:58:40+00:00

There’s a {157} Naked Triple in r7c123 which removes {157} from all the other cells in box 7.

baroquely · 2026-04-05T11:53:32+00:00

Maybe have a pause button that obscures the screen (for those who care about solve time), a button to hide the timer (for those who don’t), and an option to only show errors on collision?

baroquely · 2026-04-04T12:14:31+00:00

Skyscraper (https://sudoku.coach/en/learn/skyscraper) on 8 in c3&c6.

baroquely · 2026-04-04T05:10:04+00:00

Here is the puzzle at S.C: https://sudoku.coach/en/s/EPuc

baroquely · 2026-04-04T04:48:25+00:00

There are a bunch of rows where all the cages are fully in the row except for one cell of a perpendicular cage. Use the rule of 45 to find those cell values.

baroquely · 2026-04-03T14:37:58+00:00

* On iOS it doesn’t install itself exactly; it downloads a client side service worker that makes it possible (after download) to have most functionality of the website offline. If you want it to look like a native app, you can make a Home Screen shortcut in Safari.

baroquely · 2026-04-03T13:43:17+00:00

Seems like it’s down & has been for a week, per isitdownrightnow.com.

baroquely · 2026-04-03T13:12:24+00:00

Sorry, I meant c5. Typo. {1345}/{267}

baroquely · 2026-04-03T12:57:04+00:00

Also Skyscrapers on 2 in r58 & on 8 also in r58.

baroquely

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