ps-util

Generally helpful utility functions and traits.

Overview

This crate provides three groups of utilities:

• Array: a trait implemented for every AsRef<[T]> type (slices, arrays, vectors, and more) that offers JavaScript-inspired array methods: map, filter, find, reduce, join, flat, some, every, and many more. It also includes binary-search-based *_equal_in_sorted_by methods for sorted slices, such as find_equal_in_sorted_by and slice_equal_in_sorted_by, which run in O(log n).
• subarray, subarray_checked, subarray_unchecked: functions returning a fixed-size array reference &[T; S] into a slice.
• ToResult and ResConv: ergonomic conversions for Result and Option values.

Usage

Add the dependency:

cargo add ps-util

Then:

use ps_util::{Array, ToResult};

let arr = [1, 2, 3, 4];

assert_eq!(arr.filter(|x| x % 2 == 0), vec![2, 4]);
assert_eq!(arr.join(" + "), "1 + 2 + 3 + 4");
assert_eq!(arr.find_index_equal_in_sorted_by(|x| x.cmp(&3)), Some(2));

assert_eq!(7.ok::<()>(), Ok(7));

License

Licensed under the GNU General Public License, version 3 or later.