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计时器后台计时问题探究 - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!
...还是计时,后面时间久了就不计时了是吗?这个需要研究源码,调查一下
标签的“具有外边距”有啥用? - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!
...Dp = dpToPx(view, DEFAULT_LABEL_MARGIN);
} 复制代码根据源码,标签只有在特定的布局中才会有margin,否则就是0不生效。
ViewGroup.MarginLayoutParams 是 Android 布局系统中一个 用于描述视图外边距(margin) 的参数类。它继承自 ViewGro...
AI伴侣现已正式升级为“AppInventor学院”App! - App Inventor 2 中文网 -...
...经申请完成,各开源项目我们会遵循其开源协议,售卖的源码必定是我们自己原创或合作有版权的,更不会去抄袭别人的作品、视频等。然后,MIT的Logo我们用了一段时间,可能你们也有所疑问是否构成侵权,关于MIT Logo的使用问...
控件重绘函数/消息OnPaint,OnDraw,OnDrawItem,DrawItem的区别 - C/C++ - 清...
...是OnPaint和Ondraw的关系,其实这个很简单,CView::OnPaint()的源码如下:
void CView::OnPaint()
{
CPaintDC dc(this);
OnPrepareDC(&dc);
OnDraw(&dc)
}
从代码中可以清楚的看出他们的关系。
OnPaint OnDraw OnDrawItem DrawItem ...
Office在线预览及PDF在线预览的实现方式大集合 - 更多技术 - 清泛网 - 专注...
...的保护的源文件及文件的复制,不可复制也是缺点。
2、源码是自己的,版权有保证。
缺点:
1、服务器上必须安装Office软件。
2、导出PDF文件本身是个打印过程,Excel页面格式未设置,会出现一张表格打印出多页来,阅读体...
Is it abusive to use IDisposable and “using” as a means for getting “scoped behavior” for exception
...
I don't think so, necessarily. IDisposable technically is meant to be used for things that have non-managed resources, but then the using directive is just a neat way of implementing a common pattern of try .. finally { dispose }.
A purist would argue 'yes - it's...
Optimizing away a “while(1);” in C++0x
...sume we have the following loops,
where count and count2 are global variables (or have had their address
taken), and p is a local variable, whose address has not been taken:
for (p = q; p != 0; p = p -> next) {
++count;
}
for (p = q; p != 0; p = p -> next) {
++count2;
}
Coul...
boost多索引容器multi_index_container实战 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的,具体请参见boost文档
最后,给出一些文章中用到的源码没有的实现部分
#include <algorithm>
#include <vector>
#include "boost/lambda/lambda.hpp"
#include "boost/function.hpp"
Course::Course( unsigned int num, unsigned int hour, std::string name ) ...
程序员之网络安全系列(三):数据加密之对称加密算法 - 更多技术 - 清泛网...
...8B4QCotyZkKf091WElCwG659QiVVw0=
Decrypeted: I Love You, Li Li
.NET 源码:
using System;
using System.Security.Cryptography;
using System.IO;
using System.Text;
namespace AES
{
class MainClass
{
public static void Main (string[] args)
{
string password = "Don't beli...
[since C++11] std::array的使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...******************
1 2 3 4 5
1 2 3 4 0
1 2 3 0 0
1 2 0 0 0
1 0 0 0 0
源码
array_test.cpp
std::array
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来源:https://elloop.github.io/c++/2015-12-23/learning-using-stl-5-std-array