function findIndeximport { findIndex } from "https://deno.land/x/denjucks@1.1.1/src/deps/path/std/bytes/mod.ts"; findIndex(a: Uint8Array, pat: Uint8Array): numberFind first index of binary pattern from a. If not found, then return -1 * Parametersa: Uint8Arraypat: Uint8ArrayReturnsnumber