src/array/intset/asSortedSet.js

// jshint undef:true
// jshint unused:true
/*
Copyright (c) 2020, Nurul Choudhury
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

import dedupSortedArr from './dedupSortedArr';
import hasNoDups from './hasNoDups';
import isSorted from './isSorted';

/**
 * converts an array to sorted set, pure function - does not modify the input
 * @param  {[type]} array  - the array of (string|number) to sorted and dedup
 * @return {[type]}          return a deduped sorted array of (string|number)
 */
export default function asSortedSet(array) {
	let arr;
	if( isSorted(array)) arr = array;
	else arr = array.slice(0).sort( (a,b) => a<b?-1:a===b?0:1);
	return  hasNoDups(arr) || dedupSortedArr(arr);
}