/**
 * 判断是否是Number
 * @param s
 */
declare function isNumber(s: any): boolean;
/**
 * 判断是否是String
 * @param s
 */
declare function isString(s: any): boolean;
/**
 * 判断是否是Array
 * @param s
 */
declare function isArray(s: any): boolean;
/**
 * 强转int
 * @param s
 */
declare function int(s: any): number;
/**
 * 返回2向量的夹角
 * @param x1
 * @param y1
 * @param x2
 * @param y2
 */
declare function vectorAngle(x1, y1, x2, y2): number;
/**
 * 日志打印
 */
declare function log(thisObj:any,...args): void;