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Make code smaller and easier to understand #1

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31 changes: 12 additions & 19 deletions src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -6,9 +6,9 @@ use std::io::{stdin, BufRead, Result};
#[derive(FromArgs)]
/// Sample stdin
struct SampCli {
#[argh(option, short = 'r')]
#[argh(option, short = 'r', default = "0.5")]
/// sample ratio
ratio: Option<f32>,
ratio: f32,

#[argh(option, short = 's')]
/// seed string
Expand All @@ -18,25 +18,18 @@ struct SampCli {
fn main() -> Result<()> {
let args: SampCli = argh::from_env();

let sample_ratio = args.ratio.unwrap_or(0.5);

let mut rng = if let Some(seed) = args.seed {
Seeder::from(seed).make_rng()
} else {
SipHasher::new().into_rng()
let mut rng = match args.seed {
Some(seed) => Seeder::from(seed).make_rng(),
None => SipHasher::new().into_rng(),
};

let stdin = stdin();
let mut lines = stdin.lock().lines();
while let Some(line) = lines.next() {
if let Ok(line) = line {
let dice: f32 = rng.gen();
if dice < sample_ratio {
println!("{}", line);
}
} else {
break;
}
for line in stdin()
.lock()
.lines()
.filter(|_| rng.gen::<f32>() < args.ratio)
{
println!("{}", line?)
}

Ok(())
}