export declare function indexOf(vs: number[], x: number): number;
export declare function indexNearest(vs: number[], x: number): number;
export declare function indexAfter(vs: number[], x: number): number;
export declare function indexAtOrAfter(vs: number[], x: number): number;
export declare function indexBefore(vs: number[], x: number): number;
export declare function indexAtOrBefore(vs: number[], x: number): number;