paip.提升效率--批量变量赋值 "多元"赋值 ##石麻是批量变量赋值. 为一组变量赋值. 例子 1 <?php $my_array = array("Dog","Cat","Horse"); list($a, $b, $c) = $my_array; echo "I have several animals, a $a, a $b and a $c."; ?> 输出: I have seve
select sum(发行金额) from( select PoolNameFormat,count(cast(ItemValue as decimal(19,4))) as 发行笔数,sum(cast(ItemValue as decimal(19,4))) as 发行金额 from ( select *, case when PoolName like '%2015%'then 2015 when PoolName like '%2016%'then 2016 when PoolName l
#region 更新赋值,前者赋值给后者 public static void ShadowCopy(object a, object b) { if (a == null) return; if (a.GetType() == b.GetType()) { PropertyInfo[] properties = a.GetType().GetProperties(); foreach (var p in properties) { var value = p.GetValue(a, null)
例如 Class A { int x = 0; int y = 0; } public void test() { A test1 = new A( ); A test2 = new A( ); test1.x = 1; test1.y = 2; test2.x = 3; test2.y = 4; test1 = test2;//此时test1.x = 3; test1.y = 4
注 以下代码编译及运行环境均为 Xcode 6.4, LLVM 6.1 with GNU++11 support, Mac OS X 10.10.2 调用时机 看例子 // // main.cpp // test // // Created by dabao on 15/9/30. // Copyright (c) 2015年 Peking University. All rights reserved. // #include <iostream> class Base { public: