所谓js的中的传值,其实也就是说5种基本数据类型(null,undefind,boolean,number,string) 传引用也就是说的那个引用数据类型,(array和objec) 基本数据类型的值不可变,而引用数据类型的值是可变的 所以当你比较数组和对象时,都是false;除非你是克隆的原份数据 即: var a = { name: "李四" }; var b = a; 大家通常称对象为引用类型,以此来和基本类型进行区分; 而对象值都是引用,所以的对象的比较也叫引用的比较,当且仅
update groupuser as g1 join groupuser as g2 on (g1.user_id=1 and g2.user_id = 2) or(g1.user_id = 2 and g2.user_id=1) set g1.group_id = g2.group_id,g2.group_id=g1.group_id;
<script type="text/javascript"> var sdts = [ {name:"小明",age:30}, {name:"小红",age:20}, {name:"小花",age:40} ] function compare(property,desc) { return function (a, b) { var value1 = a[property]; var value2 = b[pro
1.方法一:js的正则表达式:请求路径:http://127.0.0.1/pec/jsp/member/refundOrder.jsp?status=4 <script> var status= getUrlAttribute('status'); if(null!=status) { alert(status); } function getUrlParam(name) { var reg = new RegExp("(^|&)" + name + "=