我知道当我们使用GET方法跨页面或在同一页面内传递数据时,我们使用GET函数从php中的url获取变量.
然而
$obj = new BlahBlahName($_GET);
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这是做什么的?
现在,我知道这是因为没有调用函数的开销,但是调用函数的开销真的那么重(并且值得让它内联的膨胀)?
根据我的记忆,当一个函数被调用时,比如说f(x,y),x和y被压入堆栈,堆栈指针跳转到一个空块,然后开始执行.我知道这有点过于简单了,但我错过了什么吗?一些推送和跳转来调用一个函数,真的有那么多的开销吗?
如果我忘了什么,请告诉我,谢谢!
在IE6中,HTML如下:
<div id="topmenu">
<ul>
<li>num 1</li>
<li>num 2</li>
</ul>
<div id="rightItem">Hello World</div>
</div>
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CSS如下:
#rightItem {
cursor: pointer;
float: right;
clear: none;
height: 100%;
width: 340px;
}
#topmenu {
margin: 0 auto;
text-align: left;
width: 960px;
height: 41px;
}
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它在除IE6之外的所有浏览器中将itemRight浮动到同一行(第一个UL然后是rightItem)的右侧.在IE6中,它是清除并向右浮动.我如何修复IE6?
我正在尝试通过查看代码来复制我进入我的Gmail的邮件程序.我在多个源查看器中看到了很多这样的内容:
<td style=3D"border-bottom: 1px dotted rgb(153,157, 147); border-top: 1px solid rgb(28, 140, 78);" width=3D"90">=A0</td>
<td style=3D"border-bottom: 1px dotted rgb(153,157, 147); border-top: 1px solid rgb(28, 140, 78);" align=3D"right" width=3D"110">
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3D是某种我不知道的邮件呈现方式吗?
当我写这篇文章时,编译并运行:
int x;
scanf ("%d", &x);
while (x!=4) {
scanf ("%d", &x);
}
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当插入char或小于4的double数时,它进入一个无限循环.
当插入大于4的double时,它会终止.
任何解释?
如果我们多次提交,例如,我们的本地仓库,修订版3000,3001,3002,3003.如果我们推送到远程仓库,它将推动3000到3003.有没有办法只推3000和3001?
我发现有两种方法(提交和执行)将Runnable添加到线程池中,有什么区别?
我有一些代码可以更新电子邮件的人员列表.此列表经常更新,在调用代码的实际"发送电子邮件"部分之前添加和删除人员.目前我的代码处理这个是这样的:
if (instructorEmailType == InstructorEmailType.AddToCourse)
{
// If instructor not already in the list, then put them in.
if (!this.InstructorsToEmail.ContainsKey(courseInstructor))
{
this.InstructorsToEmail.Add(courseInstructor, InstructorEmailType.AddToCourse);
}
else
{
// If instructor already in the list, and marked for removal, then get rid
// of that entry from the list.
if (this.InstructorsToEmail[courseInstructor] == InstructorEmailType.RemoveFromCourse)
{
this.InstructorsToEmail.Remove(courseInstructor);
}
}
}
else
{
if (this.InstructorsToEmail.ContainsKey(courseInstructor))
{
this.InstructorsToEmail.Remove(courseInstructor);
}
else
{
this.InstructorsToEmail.Add(courseInstructor, InstructorEmailType.RemoveFromCourse);
}
}
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这很复杂,我不喜欢它.我一直在考虑实现Command设计模式.我的想法是创建两个命令:
当教师被分配到课程时,我会新建SendAllocatedInstructorEmailCommand并添加它以CommandInvoker.SetCommand供以后使用.同样,我会SendDeallocatedInstructorEmailCommand …
我想从多个位置加载键值对.我的第一个猜测是:
<util:properties id="requestProcessorRepository"
location="classpath*:*requestProcessors.properties"/>
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但它无效
Invocation of init method failed; nested exception is java.io.FileNotFoundException: class path resource [classpath*:*requestProcessors.properties] cannot be opened because it does not exist
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1412)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:546)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:872)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:423)
at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:84)
at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:1)
at org.springframework.test.context.TestContext.loadApplicationContext(TestContext.java:280)
at org.springframework.test.context.TestContext.getApplicationContext(TestContext.java:304)
... 24 more
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没有通配符,它就会起作用.
那么从通配文件创建属性对象/映射的任何其他可能性?
根据下面的代码显示JQuery对话框,按钮文本显示为文字"b"而不是变量b的值.
即:showWarningDialog('myBody', 'myTitle', 'go')显示一个带有标记的按钮b而不是的对话框go.
你怎么能go出现?
function showWarningDialog(theBody, theTitle, buttonText) {
var t = "Warning";
if (theTitle != null) {
t = theTitle;
}
var b = "Ok";
if (buttonText != null) {
b = buttonText;
}
$("#div-dialog-warning div").text(theBody);
$("#div-dialog-warning").dialog({
title: t,
resizable: false,
height: 160,
modal: true,
buttons: {
b : function () {
$(this).dialog("close");
}
}
});
}
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