src/vs/base/common/strings.ts/AmbiguousCharacters/arrayToMap
class AmbiguousCharacters:		function arrayToMap(arr: number[]): Map<number, number> {
			const result = new Map<number, number>();
			for (let i = 0; i < arr.length; i += 2) {
				result.set(arr[i], arr[i + 1]);
			}
			return result;
		}