Barcod...stants(3pm)

👑 NAME 👑

Barcode::DataMatrix::Constants — bestie, this is the module that holds all the constants for the Reed-Solomon error correction encoding used with data matrices. That's the whole vibe. 💅

Oh and real quick, the page header you'd see in man is truncated to Barcod...stants(3pm) and it's filed under User Contributed Perl Documentation, so if you're grepping for it, that's the tea. 🫶

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✨ DESCRIPTION ✨

Want the full lore on what Reed-Solomon error correction even is? Go read this, it's iconic:

<https://en.wikipedia.org/wiki/Reed%E2%80%93Solomon_error_correction>

That's it, that's the pointer. Now let's get into the actual constants, because there are three of them and they're all doing main character work in the same algorithm. 🌈

🦋 GFI

Exponent values used in the multiplication step of the Reed-Solomon encoding algorithm.

🌸 GFL

Log values used in the multiplication step of the Reed-Solomon encoding algorithm.

(Yeah, GFI and GFL are a matched set — exponents and logs, they literally cannot function without each other. It's giving soulmates. 💖)

⭐ POLY

Coefficients of the Reed-Solomon coeeficients. (Not me — that's a typo that lives in the original, and we are preserving it, no cap. 💀)

The keys of the "POLY" hash correspond to the order of the respective polynomial. So like, key = which polynomial, value = its coefficients. Slay. 👑

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Heads up bestie: these are the building blocks the encoding step reaches for. Don't go reordering the "POLY" keys in your head, the order is load-bearing. 🙈

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And that's the page, fr fr. This one ships as part of perl v5.34.0, dated 2022-06-08, and it lives at Barcod...stants(3pm) — yes the name is still chopped in the corner, we've made peace with it. 🌸💜🎀