necrobious / cel

Choose N number of options from a list of options

Deterministic selection of N number of options, based on the consistent hash of an input value.

The input value currently supports two character hex value of a byte, with base64 added shortly.

The input value is converted to a byte array and subsequently xor'ed into a single byte

The resulting byte modulo the number of choices given provides an index value to the available choices.

This means that you MUST always supply the same available choices string (values AND order) to get the same resulting choices.

Building

Build CLI

cargo build --bin cel --features="clap" --release

Build as library

cargo build  --release

Runnning CLI

target/release/cel -v --choices 'A|B|C|D|E|F|G|H|I|J|K' --choice-count=3 --input-type 'hex' --input $(echo -n 'hello world' | md5sum | awk '{printf "%s", $1}')

will output

Args {
    choices: [
        "A",
        "B",
        "C",
        "D",
        "E",
        "F",
        "G",
        "H",
        "I",
        "J",
        "K",
    ],
    choice_count: 3,
    input_type: HexV1,
    input: "5eb63bbbe01eeed093cb22bb8f5acdc3",
    delimiter: "\n",
    omit_new_line: false,
    verbose: 1,
}
--- ---
C
D
E