pub fn new_from_env(default_nodes: usize, default_seed: u64) -> Result<Self, String> {
        let mut num_nodes = default_nodes;
        let mut random_seed = default_seed;
        for (key, value) in std::env::vars() {
            if key.eq_ignore_ascii_case("random_seed") {
                if value.eq_ignore_ascii_case("random") {
                    random_seed = thread_rng().next_u64();
                } else {
                    random_seed = value
                        .parse()
                        .map_err(|_| "RANDOM_SEED must be an unsigned integer or Random")?;
                }
            }
        }
        let mut rng = ChaChaRng::seed_from_u64(random_seed);
        for (key, value) in std::env::vars() {
            if key.eq_ignore_ascii_case("num_nodes") {
                if value.eq_ignore_ascii_case("random") {
                    num_nodes = rng.gen_range(1, 20);
                } else {
                    num_nodes = value
                        .parse()
                        .map_err(|_| "NUM_NODES must be an unsigned integer")?;
                }
            }
        }
        Ok(Self::new(num_nodes, random_seed))
    }
/// Parse NUM_NODES and RANDOM_SEED from environment or use the default
/// value. If RANDOM_SEED=Random, use a system generated random seed.
/// If NUM_NODES=Random, use a generated number between 1 and 20.
Parse NUM_NODES and RANDOM_SEED from environment or use the default
value. If RANDOM_SEED=Random, use a system generated random seed.
If NUM_NODES=Random, use a generated number between 1 and 20.
Parse NUM_NODES and RANDOM_SEED from environment or use the default value . If RANDOM_SEED = Random use a system generated random seed . If NUM_NODES = Random use a generated number between 1 and 20 .
pub fn new_from_env(default_nodes: usize, default_seed: u64) -> Result<Self, String> {
        let mut num_nodes = default_nodes;
        let mut random_seed = default_seed;
        for (key, value) in std::env::vars() {
            if key.eq_ignore_ascii_case("random_seed") {
                if value.eq_ignore_ascii_case("random") {
                    random_seed = thread_rng().next_u64();
                } else {
                    random_seed = value
                        .parse()
                        .map_err(|_| "RANDOM_SEED must be an unsigned integer or Random")?;
                }
            }
        }
        let mut rng = ChaChaRng::seed_from_u64(random_seed);
        for (key, value) in std::env::vars() {
            if key.eq_ignore_ascii_case("num_nodes") {
                if value.eq_ignore_ascii_case("random") {
                    num_nodes = rng.gen_range(1, 20);
                } else {
                    num_nodes = value
                        .parse()
                        .map_err(|_| "NUM_NODES must be an unsigned integer")?;
                }
            }
        }
        Ok(Self::new(num_nodes, random_seed))
    }
pub fn new_from_env ( default_nodes : usize , default_seed : u64 ) -> Result < Self , String > { let mut num_nodes = default_nodes ; let mut random_seed = default_seed ; for ( key , value ) in std :: env :: vars ( ) { if key . eq_ignore_ascii_case ( " " ) { if value . eq_ignore_ascii_case ( " " ) { random_seed = thread_rng ( ) . next_u64 ( ) ; } else { random_seed = value . parse ( ) . map_err ( | _ | " " ) ? ; } } } let mut rng = ChaChaRng :: seed_from_u64 ( random_seed ) ; for ( key , value ) in std :: env :: vars ( ) { if key . eq_ignore_ascii_case ( " " ) { if value . eq_ignore_ascii_case ( " " ) { num_nodes = rng . gen_range ( 1 , 20 ) ; } else { num_nodes = value . parse ( ) . map_err ( | _ | " " ) ? ; } } } Ok ( Self :: new ( num_nodes , random_seed ) ) }
Parse NUM_NODES and RANDOM_SEED from environment or use the default
value.
Parse NUM_NODES and RANDOM_SEED from environment or use the default value .
default_nodes
usize
default_seed
u64
default_nodes
usize
default_seed
u64