Toot

Written by Luc on 2025-01-30 at 19:48

srand(1)

a = rand()

srand(-1)

b = rand()

a == b?

Bash: yes (RANDOM=)

C: no (stdlib.srand)

C#: yes (System.Random)

JS: error (can't seed Math.random)

Lua: no (math.randomseed)

Perl: yes (srand)

PHP: no (srand)

Python: yes (random.seed, cpython&pypy)

Ruby: yes (srand)

is throwing away the sign bit at least documented? Only in C#! Python docs even say "all of its bits are used" but it's a lie.

I didn't expect much of Bash or C, but what blows my mind? PHP acting more sane than Python 🤯

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