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Is the sizeof(some pointer) always equal to four?
...often a different size to normal pointers and also vary by platform, type, etc. Other than that +1.
– John5342
May 30 '13 at 12:59
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show 18...
Long list of if statements in Java
...() implements Command {
void exec() {
// ...
}
}
// etc etc
then build a Map<String,Command> object and populate it with Command instances:
commandMap.put("A", new CommandA());
commandMap.put("B", new CommandB());
then you can replace your if/else if chain with:
co...
Simulating tremor (from e.g. Parkinson's Disease) with the mouse on a webpage?
...e tremor input.
Finally: for whatever controls you are programming (links, etc.):
capture click events, nudge them to the current "tremor" location based on the state of your tremor curves, and bounds-check your elements to see if the user has shaken out of the element intended, or possibly into an...
String, StringBuffer, and StringBuilder
...)
.toString()
Or
String s = new StringBuilder(100).appe..... etc. ...
// The difference is a size of 100 will be allocated upfront as fuzzy lollipop points out.
StringBuffer ( the syntax is exactly as with StringBuilder, the effects differ )
About
StringBuffer vs. StringBuilder ...
Exception thrown inside catch block - will it be caught again?
...{ } catch (Exception e){ System.err.println("In catch Exception: "+e.getClass()); }catch (IOException e){ System.err.println("In catch IOException: "+ e.getClass()); } and the code in try block generates IO Exception, Will it go to the immediate general Exception block or it will fly ove...
Citrix服务器虚拟化：XenApp 6.5发布服务器上的应用程序 - 更多技术 - 清泛...
...用程序类型后，必须为要发布的文件指定 URL（统一资源定位器）或 UNC（通用命名约定）路径。
单击浏览可查看网络中的可用内容资源。
3) 应用程序：发布安装在场中的一台或多台服务器上的应用程序。请注意，如果您在某...
Pandas aggregate count distinct
...aframe, then grouped to ~2M
%time _=g.agg({"id": lambda x: x.nunique()})
CPU times: user 3min 3s, sys: 2.94 s, total: 3min 6s
Wall time: 3min 20s
%time _=g.agg({"id": pd.Series.nunique})
CPU times: user 3min 2s, sys: 2.44 s, total: 3min 4s
Wall time: 3min 18s
%time _=g.agg({"id": "nunique"})
CPU...
C语言结构体里的成员数组和指针 - c++1y / stl - 清泛IT社区，为创新赋能！
...问0x4的内存地址，不crash才怪。于是，你一定会有如下的问题：1）为什么不是 13行if语句出错？f.a被初始化为空了嘛，用空指针访问成员变量为什么不crash？2）为什么会访问到了0x4的地址？靠，4是怎么出来的？3）代码中的第4行...
京东618：算法让UV价值提升200%+，用智能卖场缩短购物路径 - 更多技术 - 清...
...区画像，除了界面的差异，两者在后端的处理上要解决的问题有什么不同？对推荐搜索和移动研发、交易平台研发的协作有什么样的要求？
智能卖场团队：这两者要解决的问题本质上是相同的，所以用的算法引擎是相同的。但...
What's better at freeing memory with PHP: unset() or $var = null
...age collector will do it when it see fits - by intention as soon, as those CPU cycles aren't needed anyway, or as late as before the script would run out of memory, whatever occurs first.
If you are doing $whatever = null; then you are rewriting variable's data. You might get memory freed / shrunk f...