import * as mod from "https://dotland.deno.dev/std@0.69.0/bytes/mod.ts"; FunctionsfconcatConcatenate two binary arrays and return new one. fcontainsCheck source array contains pattern array. fcopyBytesCopy bytes from one Uint8Array to another. Bytes from src which don't fit into dst will not be copied. fequalCheck whether binary arrays are equal to each other. ffindIndexFind first index of binary pattern from a. If not found, then return -1 ffindLastIndexFind last index of binary pattern from a. If not found, then return -1. fhasPrefixCheck whether binary array starts with prefix. fhasSuffixCheck whether binary array ends with suffix. frepeatRepeat bytes. returns a new byte slice consisting of count copies of b.