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分布式系统的事务处理 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...们假设D2传播到了所有节点(B和C),B和C收到的数据不是从客户产生的,而是别人复制给他们的,所以他们不产生新的版本信息,所以现在B和C所持有的数据还是D2(A,2)。于是A,B,C上的数据及其版本号都是一样的。
3)如果我们...
What are the First and Second Level caches in Hibernate?
...ed, but there is no option to get rid of it. but you should think about it all the time..
– ses
Mar 28 '13 at 17:39
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IOS7 : UIScrollView offset in UINavigationController
...nd the solution, I have set in my controller the property:
self.automaticallyAdjustsScrollViewInsets = false
I don't really understand the true benefit of this property though, (or why the default value is true)
The only documentation i found was there:
https://web.archive.org/web/20160405135...
Colspan all columns
How can I specify a td tag should span all columns (when the exact amount of columns in the table will be variable/difficult to determine when the HTML is being rendered)? w3schools mentions you can use colspan="0" , but it doesn't say exactly what browsers support that value (IE 6 is in our li...
WWW or not WWW, what to choose as primary site name? [closed]
...ic to me. I also like shorter URLs. If it were up to me I would redirect all traffic from www.example.com to example.com.
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Vertical (rotated) text in HTML table
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After having tried for over two hours, I can safely say that all the method mentioned so far don't work across browsers, or for IE even across browser versions...
For example (top upvoted answer):
filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=0.083); /* IE6,IE7 */
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How to sparsely checkout only one single file from a git repository?
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Originally, I mentioned in 2012 git archive (see Jared Forsyth's answer and Robert Knight's answer), since git1.7.9.5 (March 2012), Paul Brannan's answer:
git archive --format=tar --remote=origin HEAD:path/to/directory -- filename...
Load “Vanilla” Javascript Libraries into Node.js
... have some functionality I would like to use in a Node.js server. (Specifically I want to use a QuadTree javascript library that I found.) But these libraries are just straightforward .js files and not "Node.js libraries".
...
Row count with PDO
... question, the only reason mysql_num_rows() worked is because it was internally fetching all the rows to give you that information, even if it didn't seem like it to you.
So in PDO, your options are:
Use PDO's fetchAll() function to fetch all the rows into an array, then use count() on it.
Do an ex...
Save icon: Still a floppy disk? [closed]
...hen you need to create PDF. E-mail has a little picture of an envelope, usually. Icons are just icons.
– Welbog
Jun 19 '09 at 19:15
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