parameters

问题 I am trying to do run a bulk deletion using parameterized queries. Currently, I have the following code: pendingDeletions = new SQLiteCommand(@"DELETE FROM [centres] WHERE [name] = $name", conn); foreach (string name in selected) pendingDeletions.Parameters.AddWithValue("$name", name); pendingDeletions.ExecuteNonQuery(); However, the value of the parameter seems to be overwritten each time and I end up just removing the last centre. What is the correct way to execute a parameterized query

问题 From a client application I tyipically do: select * from table where Name = :Parameter and then before executing the query I do :Parameter = 'John' These parameters are not a Search&Replace but real parameters passed to the server. Since I need to test some of those queries in detail, how can I write the query in management studio? I want to write the query with parameters and give a value to the parameter. How can this be done? Update: To remove confusion here I add info to better express

问题 I'm using getattr to call different functions depending on a variable. Im doing something like that: getattr(foo, bar) () That works, calling functions like foo.bar() My problem is that I have 'bar' functions and I want to call it with different parameters. For example: def f1() : pass def f2(param1) : pass def f3(param1,param2) : pass so 'bar' could be f1, f2, or f3 I tried this: assumming that params is a list which contains all parameters needed for the 'bar' function getattr(foo, bar)

问题 I have a stored procedure as follows. CREATE OR REPLACE PROCEDURE TEST( X IN VARCHAR2 DEFAULT 'P', Y IN NUMBER DEFAULT 1) AS BEGIN DBMS_OUTPUT.PUT_LINE('X'|| X||'--'||'Y'||Y); END; When I execute the above procedure EXEC TEST(NULL,NULL); It will print X--Y . The input parameters are not defaulting to the specified values in the procedure signature when input parameters are null . What is the use of default values then? What if we pass a null value as input and we want to replace a null value

问题 Simple question, how do I document that "Mixed-type"? I know I could just list all possible types like {null|undefined|String|Number|Object} and end up finding myself missing one and making it overly complex. I tried using the Mixed keyword, but it popups errors in many IDEs such as WebStorm. 回答1: I found the way to do it: /** * @param {*} foo */ function bar(foo) {} 回答2: Use {} There is an example from http://usejsdoc.org/tags-type.html: An object called 'myObj' with properties 'a' (a number

问题 Duplicate: Is there a way to indicate the last n parameters in a batch file? how to get batch file parameters from Nth position on? Clarification: I knew of the looping approach - this worked even before Command Extensions; I was hoping for something fun and undocumented like %~*1 or whatever - just like those documented at http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/percent.mspx?mfr=true. In a Windows batch file (with the so called "Command Extensions" on),

问题 Duplicate: Is there a way to indicate the last n parameters in a batch file? how to get batch file parameters from Nth position on? Clarification: I knew of the looping approach - this worked even before Command Extensions; I was hoping for something fun and undocumented like %~*1 or whatever - just like those documented at http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/percent.mspx?mfr=true. In a Windows batch file (with the so called "Command Extensions" on),

问题 Recently I found Parameters library in the Boost. Honestly I didn't understand the reason why this is a part of Boost. When there is need to pass several parameters to the function you can make a structure from them, like: struct Parameters { Parameters() : strParam("DEFAULT"), intParam(0) {} string strParam; int intParam; }; void foo(const Parameters & params) { } Parameters params; params.intParam = 42; foo(params); This is very easy to write and understand. Now example with using Boost

问题 Recently I found Parameters library in the Boost. Honestly I didn't understand the reason why this is a part of Boost. When there is need to pass several parameters to the function you can make a structure from them, like: struct Parameters { Parameters() : strParam("DEFAULT"), intParam(0) {} string strParam; int intParam; }; void foo(const Parameters & params) { } Parameters params; params.intParam = 42; foo(params); This is very easy to write and understand. Now example with using Boost

问题 I am looking to setup a report subscription in SSRS 2008 R2 where the client user can set the date parameter to whatever the individual user would like. I have been reading multiple suggestions to use =Today() in the parameters but this syntax does not work for me. Does anyone know whether is is possible to set my from date to "Today -30 days" and my to date to "today"? What is the syntax used in the subscription parameters? Settings: Error: 回答1: As described in the above link provided by