43 lines
908 B
Rust
43 lines
908 B
Rust
use std::{
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ops::Range,
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time::{Duration, SystemTime},
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};
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use arrayvec::ArrayString;
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use rand::{Rng, RngExt, seq::SliceRandom};
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pub fn shuffle<T>(vec: &mut [T]) {
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let mut rng = rand::rng();
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vec.shuffle(&mut rng);
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}
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pub fn string(length: usize) -> String {
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rand::rng()
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.sample_iter(&rand::distr::Alphanumeric)
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.take(length)
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.map(char::from)
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.collect()
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}
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#[inline]
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pub fn string_array<const LENGTH: usize>() -> ArrayString<LENGTH> {
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let mut ret = ArrayString::<LENGTH>::new();
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rand::rng()
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.sample_iter(&rand::distr::Alphanumeric)
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.take(LENGTH)
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.map(char::from)
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.for_each(|c| ret.push(c));
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ret
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}
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#[inline]
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#[must_use]
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pub fn time_from_now_secs(range: Range<u64>) -> SystemTime {
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SystemTime::now()
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.checked_add(secs(range))
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.expect("range does not overflow SystemTime")
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}
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#[must_use]
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pub fn secs(range: Range<u64>) -> Duration { Duration::from_secs(rand::random_range(range)) }
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