There is a mobile piece and a stationary piece on the N×M chessboard. The available moves of the mobile piece are the same as set out in the image bel...
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其他好文 时间:
2015-05-27 19:03:01
阅读次数:
237
我们可以将一组语句构建成一个事务(transaction)。当所有语句都顺利执行之后,事务可以提交(commit)。否则,如果其中某个语句遇到错误,那么事务将被回滚,就好像没有任何语句被执行过一样。 将多个语句组合成事务的主要原因是为了确保数据库完整性(database integrity)。...
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数据库 时间:
2015-05-27 15:42:04
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146
问题:John is going on a fishing trip. He has h hours available (1 = 0 ), is known. Each 5 minutes of fishing decreases the number of fish expected to be...
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其他好文 时间:
2015-05-27 15:27:29
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251
android获取手机cpu并判断是单核还是多核/*** Gets the number of cores available in this device, across all processors.* Requires: Ability to peruse the filesystem at ...
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移动开发 时间:
2015-05-27 11:37:06
阅读次数:
176
Android内存性能优化,如何检测内存泄露。Memory monitor、Heap Viewer、Allocation tracer工具的特色与使用场景。...
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移动开发 时间:
2015-05-27 07:26:38
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225
Enterprise Linux (RHEL, CentOS, Fedora, etc.)Node.js and npm are available from theExtra Packages for Enterprise Linux(EPEL) repository.To check if yo...
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Web程序 时间:
2015-05-26 22:45:50
阅读次数:
204
EDIT :Here the best solution : install it via npm :npm install -g slimerjs-g to be available everywhere. And that's it, juste choose your--engine=slim...
在《使用lock语句同步多个线程》的文章中,使用lock语句同步多线程访问临界资源。
使用lock语句的代码如下所示。
private static object o = new object();
lock (o)
{
if (account >= 1000)
{
Thread.Sleep(10);//自动取款机打了个小盹
accoun...
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编程语言 时间:
2015-05-25 22:28:31
阅读次数:
280
Say you have an array for which the ith element is the price of a given stock on day i.If you were only permitted to complete at most one transaction ...
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编程语言 时间:
2015-05-25 18:20:31
阅读次数:
145
如下是一个股票交易的例子: 1 class Transaction // 交易的基类 2 { 3 public: 4 Transaction(); 5 virtual void logTransaction() const ...
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其他好文 时间:
2015-05-25 16:24:33
阅读次数:
123