outward-search
Search an array of items outwards from a starting index
Install
yarn add outward-searchUsage
import outwardSearch from 'outward-search';
let arr = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'];
let match = searchOutwards(arr, 3, (item, index) => {
console.log('called: ' + item);
return item === 'e';
});
// called: d
// called: e
// called: c
// called: f
console.log(match); // 'f'If you need to find an item in an array that you know should be near another item, you can use outward-search to do so efficiently.
export default function outwardSearch<T>(
items: Array<T>,
start: number,
callback: (item: T, index: number) => boolean,
): T | null;The callback is called on the start index then it works its way outwards to
either end of the array.
So with the starting index of 2 and an array with 8 items:
2 // start
3 // up
1 // down
4 // up
0 // down (hit min)
5 // up
6 // up
7 // up (hit max)
