parameters

问题 A Java method call may be parameterized like in the following code: class Test { <T> void test() { } public static void main(String[] args) { new Test().<Object>test(); // ^^^^^^^^ } } I found out this is possible from the Eclipse Java Formatter settings dialog and wondered if there are any cases where this is useful or required. EDIT Based on Arne's excellent answer i came up with the following conclusion: In addition to improved type safety as Arne's example illustrates a parameterized

问题 -Xms is to specify initial heap size or minimum heap size? I see lot of places with lot of different answers. Some like second answer here, say that it is for initial heap and some like here say that its minimum heap size. Or is it that the minimum size itself is the initial size? 回答1: The initial heap size is the minimum heap size. It won't get smaller than the initial heap size. From Tuning Garbage Collection with the 5.0 Java[tm] Virtual Machine: By default, the virtual machine grows or

问题 I'm creating a simple Ruby on Rails survey application for a friend's psychological survey project. So we have surveys, each survey has a bunch of questions, and each question has one of the options participants can choose from. Nothing exciting. One of the interesting aspects is that each answer option has a score value associated with it. And so for each survey a total score needs to be calculated based on these values. Now my idea is instead of hard-coding calculations is to allow user add

问题 I'm doing a practical assignment for university and I've run into a problem. I've got a class that declares this method: bool graficarTablero(const Tablero *&tablero, const string &nombreArchivo); I want to pass a pointer to an object Tablero by constant reference. If I call that function like, say for example: ArchivoGrafico *grafico = new ArchivoGrafico; if(grafico->graficarTablero(tablero, ARCHIVO_GRAFICO)){ ... ...I get compilation errors. Ok, I won't detail the error I get cause I think

问题 I'm doing a practical assignment for university and I've run into a problem. I've got a class that declares this method: bool graficarTablero(const Tablero *&tablero, const string &nombreArchivo); I want to pass a pointer to an object Tablero by constant reference. If I call that function like, say for example: ArchivoGrafico *grafico = new ArchivoGrafico; if(grafico->graficarTablero(tablero, ARCHIVO_GRAFICO)){ ... ...I get compilation errors. Ok, I won't detail the error I get cause I think

问题 I like to think that I have a good grasp of XSLT, but the following eludes me: Why is an xsl:param not accessible from a called template that does not explicitly declare it? In other words, if I call template B from template A: Stylesheet 1 <xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="/" name="A"><!--This template is named "A" for convenience only.--> <xsl:param name="hello" select="hello "/> <xsl:param name="world" select="world!"/>

问题 I currently am tasked with creating some command-line helper utilities for our internal development team to use. However, I want to know the best practice for creating unix command-line tools. I have tried viewing git source code for an example of how to read parameters and display messages accordingly. However, I'm looking for a clear template for creating a tool, reading parameters safely, and displaying the standard "help" messages if a user types in an incorrect parameter or --help I want

问题 HY! I have a form application in visual studio 2010 and I want to create a report with report viewer and to add some parameters. I tried to add parameters from code but it didn`t work. I have this error: FilterExpression expression for the tablix ‘Tablix1’ refers to the field ‘datastart’. Report item expressions can only refer to fields within the current dataset scope or, if inside an aggregate, the specified dataset scope. Report2.rdlc : error rsParameterReference: The FilterValue

问题 I am a student developer and I have built several installers for the company I am working with now. So I am fairly familiar with WIX. We recently decided to have a Build server that auto builds our solution. It builds both debug, and release, as well as Obfuscated (and non obfuscated) projects. And you really don't have to understand any of this. All you have to understand is that I have the same Wix project building different MSIs dynamically. So the way we build them is we call MSBuild.exe

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