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| author | Florian Fischer <florian.fischer@muhq.space> | 2026-09-25 20:19:43 +0200 |
|---|---|---|
| committer | Florian Fischer <florian.fischer@muhq.space> | 2026-09-25 21:00:13 +0200 |
| commit | bf09385a34f928e6c266d2f81337237955ee949b (patch) | |
| tree | 4a400b2864d0887bc34e931ca3e87646276c9a4e /src/utils-common.ts | |
| parent | 945f3bdceffed7d3bb20ee1849f5f166b3c467bc (diff) | |
| download | bycs-sol-bf09385a34f928e6c266d2f81337237955ee949b.tar.gz bycs-sol-bf09385a34f928e6c266d2f81337237955ee949b.zip | |
mass-graduation: keep student selection stable for 45 minutes
Diffstat (limited to 'src/utils-common.ts')
| -rw-r--r-- | src/utils-common.ts | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/utils-common.ts b/src/utils-common.ts index 8053043..153bbaa 100644 --- a/src/utils-common.ts +++ b/src/utils-common.ts @@ -33,3 +33,18 @@ export async function getUserIconUrl(userId: number): Promise<string> { return (userpicture as HTMLImageElement).src ?? ""; } + +// SplitMix32 implementation taken from: +// https://github.com/bryc/code/blob/master/jshash/PRNGs.md +// We only need a seeded PRNG to choose students to observe. +export function splitmix32(a: number) { + return function () { + a |= 0; + a = (a + 0x9e3779b9) | 0; + let t = a ^ (a >>> 16); + t = Math.imul(t, 0x21f0aaad); + t = t ^ (t >>> 15); + t = Math.imul(t, 0x735a2d97); + return ((t = t ^ (t >>> 15)) >>> 0) / 4294967296; + }; +} |