export declare function isType(val: any, type: string): boolean;
export declare function isArray<T = any>(val: any): val is Array<T>;
export declare function isArrayLike(val: any): boolean;
export declare function isString(val: any): val is string;
export declare function isNumber(val: any): val is number;
export declare function isInteger(val: any): val is number;
export declare function isDecimal(val: any): val is number;
export declare function isNegative(val: any): val is number;
export declare function isPositive(val: any): val is number;
export declare function isOdd(val: any): val is number;
export declare function isEven(val: any): val is number;
export declare function isBoolean(val: any): val is boolean;
export declare function isDate(val: any): val is Date;
export declare function isFunction(val: any): val is Function;
export declare function isError(val: any): val is Error;
export declare function isUndefined(val: any): val is undefined;
export declare function isNull(val: any): val is null;
export declare function isNil(val: any): val is null | undefined;
export declare function isObjectLike(val: any): val is object;
export declare function isPlainObject(val: any): val is object;
export declare function isPrototype(val: any): boolean;
export declare function isRegExp(val: any): val is RegExp;
export declare function isEmpty(val: any): boolean;
export declare function isEqual(value: any, other: any): boolean;
export declare function isEqualWith<T>(value: T, other: T, fn: (v1: T, v2: T) => boolean): boolean;