this post was submitted on 15 May 2025
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Programmer Humor

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[–] visnae@lemmy.world 6 points 1 week ago (1 children)

3GPP has an interesting way of serialising bools on the wire with ASN.1

NULL OPTIONAL

meaning only the type would be stored if true, otherwise it won't be set at all

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[–] Treczoks@lemmy.world 6 points 1 week ago

This guy never coded in KEIL C on an 8051 architecture. They actually use bit addressable RAM for booleans. And if you set the compiler to pass function parameters in registers, it uses the carry flag for the first bit or bool type parameter.

[–] UnfortunateShort@lemmy.world 6 points 1 week ago

Wait till you realise the size of SSD sectors

[–] ssfckdt@lemmy.blahaj.zone 6 points 1 week ago (2 children)

I swore I read that mysql dbs will store multiple bools in a row as bit maps in one byte. I can't prove it though

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[–] Valmond@lemmy.world 5 points 1 week ago

pragma(pack) {

int a:1, b:1, ... h:1;

}

IIRC.

[–] Jankatarch@lemmy.world 5 points 1 week ago* (last edited 1 week ago) (2 children)

I mean is it really a waste? What's minimum amount of bits most CPUs read in one cycle.

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[–] Iceblade02@lemmy.world 5 points 1 week ago

...or you can be coding assembler - it's all just bits to me

[–] ZeroGravitas@lemm.ee 5 points 1 week ago

7 Shades of Truth

[–] kayzeekayzee@lemmy.blahaj.zone 5 points 1 week ago (3 children)

Redundancy is nice in the event of bitflip errors

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[–] Amberskin@europe.pub 4 points 1 week ago

Pl/1 did it right:

Dcl 1 mybools, 3 bool1 bit(1) unaligned, 3 bool2 bit(1) unaligned, … 3 bool8 bit(1) unaligned;

All eight bools are in the same byte.

[–] elucubra@sopuli.xyz 4 points 1 week ago (3 children)

Could a kind soul ELI5 this? Well, maybe ELI8. I did quite a bit of programming in the 90-00s as part of my job, although nowadays I'm more of a script kiddie.

[–] feddup@feddit.uk 4 points 1 week ago

A boolean value only needs 1 bit (on or off) for true or false. However the smallest bit of addressable memory is a byte (8 bits) hence 7 are technically wasted.

For low memory devices you could instead store 8 different Boolean values in one single byte by using bit masking instead

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[–] humanspiral@lemmy.ca 2 points 1 week ago

Now store the numbers (array):

0 0 0 1 0 1 1 2

think 8 bytes???

[–] finitebanjo@lemmy.world 2 points 1 week ago (1 children)

Does anybody ever figure in parity when comparing bit sizes and all that jazz or are we only ever concerned with storage space?

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