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GridCtrl 控件FAQ - C/C++ - 清泛网 - 专注C/C++及内核技术
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//设置控件的初始行数和列数
m_Grid.SetRowCount(1);
m_Grid.SetColumnCount(4);
//设置控件背景颜色，这里GetDefaultCell的两个参数分别表示是否是固定行或者是固定列。如果不设定，缺省的颜色为白色。
m_Grid.GetDefaultCell(FALSE, FALSE)->Set...
Choice between vector::resize() and vector::reserve()
...their original memory. "want to avoid a couple of allocations" and copies etc
– Tony Delroy
Dec 28 '11 at 8:46
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Weak and strong property setter attributes in Objective-C
...or a particular file. If its on you cannot use retain release autorelease etc... Instead you use strong weak for properties or __strong
__weak
for variables (defaults to __strong). Strong is the equivalent to retain, however ARC will manage the release for you.
The only time you would want to u...
What's the difference between => , ()=>, and Unit=>
..."), for some examples). It can be passed as argument, stored in variables, etc. A "block of code" is a syntactical delimitation of statements -- it isn't a value, it can't be passed around, or anything like that.
– Daniel C. Sobral
Sep 4 '13 at 13:06
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服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...收和重用那些TIME_WAIT的资源。
下面来看一下我们网管对/etc/sysctl.conf文件的修改：
#对于一个新建连接，内核要发送多少个 SYN 连接请求才决定放弃,不应该大于255，默认值是5，对应于180秒左右时间
net.ipv4.tcp_syn_retries=2
#net.ip...
What does “program to interfaces, not implementations” mean?
...downside of the first approach?
There is the overhead of finding a company etc. Unless you are a rental car company, it may not be worth the effort.
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What is recursion and when should I use it?
...lude traversing hierarchies, e.g. website crawlers, directory comparisons, etc.
Conclusion
In practical terms, recursion makes the most sense whenever you need iterative branching.
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Why is it bad style to `rescue Exception => e` in Ruby?
... - because the airbag didn't inflate, you're probably hurt (getting fired, etc).
But wait! There's more reasons why you might want to use rescue Exception => e!
Let's say you're that car, and you want to make sure the airbag inflates if the car is exceeding its safe stopping momentum.
begin
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Can scrapy be used to scrape dynamic content from websites that are using AJAX?
...in-kazan.ru.
All messages are loaded with an AJAX request. My goal is to fetch these messages with all their attributes (author, date, ...):
When I analyze the source code of the page I can't see all these messages because the web page uses AJAX technology. But I can with Firebug from Mozilla Fi...
Selecting and manipulating CSS pseudo-elements such as ::before and ::after using jQuery
...ng :after or :before styles using a different approach:
var str = window.getComputedStyle(document.querySelector('p'), ':before')
.getPropertyValue('content');
var str = window.getComputedStyle($('p')[0], ':before').getPropertyValue('content');
console.log(str);
document.sty...