随笔

String.prototype.change = function (type) {
    switch (type) {
        case "Date":
            if (isNaN(this) && !isNaN(Date.parse(this))) {
                return new Date(this);
            } else {
                console.log("时间格式错误！");
            }
            break;
        case "Object":
            if((this.indexOf("{")>=0&&this.indexOf("}")>=0) || (this.indexOf("[")>=0&&this.indexOf("]")>=0)){
                return JSON.parse(this);
            }else{
                console.log("数组格式错误！");
            }
            break;
    }
};
String.prototype.check=function (type) {
    switch (type) {
        case "money":
            if(this.search(/^[0-9]+(.[0-9]{2})?$/g)==-1){

                console.log("数字格式错误，如有小数，只可两位小数！");

            }
            break;
        case "card":
            if(this.search(/(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/g)==-1){
                console.log("身份证校验失败！");
            }
            break;
    }
}
Object.prototype.check=function () {
    if(this&&typeof this==='object'){
        if(typeof this.length==='number' && !(this.propertyIsEnumerable('length'))){
         console.log("是数组！");
        }else{
            console.log("是对象！");
        }
    }
}