dynamic

问题 i have a pivot table code that worked in the sqlfiddle, I can't seem to get the query working when I bring it back onto my database in phpmyadmin. Here is my sqlfiddle. when I run it in my localHost phpmyadmin, the query becomes something like below: SET @@group_concat_max_len = 5000;# MySQL returned an empty result set (i.e. zero rows). SET @sql = NULL;# MySQL returned an empty result set (i.e. zero rows). SELECT GROUP_CONCAT(DISTINCT CONCAT('MAX(IF(hw_id = ', hw_id, ', score, -1)) AS ',

问题 i have a pivot table code that worked in the sqlfiddle, I can't seem to get the query working when I bring it back onto my database in phpmyadmin. Here is my sqlfiddle. when I run it in my localHost phpmyadmin, the query becomes something like below: SET @@group_concat_max_len = 5000;# MySQL returned an empty result set (i.e. zero rows). SET @sql = NULL;# MySQL returned an empty result set (i.e. zero rows). SELECT GROUP_CONCAT(DISTINCT CONCAT('MAX(IF(hw_id = ', hw_id, ', score, -1)) AS ',

问题 Pure curiosity, not to be used in production, because obviously it could cause major problems. With C++, when you allocate new memory ( var *ch = new char[x] ), the size is stored essentially in ch[-1] according to the C++ specs. The question is, is there a way to get that value? I've tried: char* ptr = ch; --ptr cout << *ptr; // AND cout << ch[-sizeof(char)]; So is there a way to hack this? Again, pure curiosity. 回答1: Disclaimer: Never, ever count on this working. Consider this only "toy

问题 I am loading a page with table in a generated div in jquery. The loading goes fine, but the table loses its styles. I have tried to apply styles on the loaded page, on the landing page, and even inline styles on the table. The inline style works partially, like background color, but text doesn't allow me to change font type, size, weight. $('<div/>', { id: 'newdiv', }).appendTo('body'); $('#newdiv').load('combi/page.with.table.php'); The table is simplified. No styles on tr or td. <table

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Dynamic proxy for concrete classes Once I create a InvocationHandler implementation, I can use it with Proxy.newProxyInstance function to get a object behaving differently. In this case, I have to create a interface and its implementation class to use the Proxy.newProxyInstance function: MyInterface objDest = Proxy.newProxyInstance(MyInterfaceImpl.class.getClassLoader(), MyInterfaceImpl.class.getInterfaces(),

问题 I am trying to create a program to do various animations on different images simultaneously and one of the effects I am trying to achieve is zooming into a picture which is achieved by keeping base frame of a fixed size and image size to increase and decrease. But when I try to dynamically change the size of an image it causes error I tried searching in the web but couldn't find the right solution to it. Below is my code. Could anyone suggest me the right examples from which I can learn it

问题 Here is the code snippet from my LinqPad: public class Elephant{ public int Size; public Elephant() { Size = 1; } } public struct Ant{ public int Size; } private T[] Transform2AnotherType<T>(Elephant[] elephantList) where T:new() { dynamic tArray = new T[elephantList.Length]; for (int i = 0; i < elephantList.Length; i++) { tArray[i] = new T(); tArray[i].Size = 100; //tArray[i].Dump(); } return tArray; } void Main() { var elephantList = new Elephant[2]; var elephant1 = new Elephant(); var

问题 Here is the code snippet from my LinqPad: public class Elephant{ public int Size; public Elephant() { Size = 1; } } public struct Ant{ public int Size; } private T[] Transform2AnotherType<T>(Elephant[] elephantList) where T:new() { dynamic tArray = new T[elephantList.Length]; for (int i = 0; i < elephantList.Length; i++) { tArray[i] = new T(); tArray[i].Size = 100; //tArray[i].Dump(); } return tArray; } void Main() { var elephantList = new Elephant[2]; var elephant1 = new Elephant(); var

问题 I have a RequestMaping that get a Search json class as body params. I want to create proper Specification from this search json object so that pass to my Repository like this: pagesResult = myRepository.findAll(mySpec) I have problme with parsing and Dynamically add items to specification. I want to achieve something like this: @Override public Phones searchPhones(int pageNumber, Map<String, String> searchObject) { List<PhoneSpecification> specificationslist = new ArrayList<>();

问题 I believe I'm asking the same question as in this thread but it wasn't answered. Here's my problem. So, applied to the range K3:K10 , I have several different conditional formatting rules that require a specific text string comprised of the contents of a referenced cell plus a constant text string. Each rule applies a different colour for a specific referenced cell and constant text string (DEAD or ALIVE) combination. For example, in the range, if a cell contains the word "Dog", then a space,