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Regular expression to match URLs in Java
...'t understand the protocol. Other than that anything goes. It won't catch: 1.2.3. 1.2.3.4.5 1.2,3.4.5: etc
– David Newcomb
Jun 9 '11 at 15:12
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Uber5岁了，一次性告诉你它的商业之道 - 资讯 - 清泛网 - 专注C/C++及内核技术
...获得基础车费3.5倍的收入，平常时段为2倍，其他系列为1.2倍。以人民优步为例，在上下班高峰期，司机接下一个车费为20元的下单并完成后，其收入是：基础车费20元3.5倍的收入70元，系统收取20%佣金后如数返还，基础车费45%的...
SQL JOIN and different types of JOINs
...A
INNER JOIN Table2 B ON A.<Primary-Key> =B.<Foreign-Key>;
1.2: INNER-JOIN: Natural-JOIN implementation
Select A.*, B.Col1, B.Col2 --But no B.ForeignKeyColumn in Select
FROM Table1 A
INNER JOIN Table2 B On A.Pk = B.Fk;
1.3: INNER-JOIN with NON-Equi-join implementation
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Fastest way to list all primes below N
...
... And it can be made yet faster with additional ~1.2x-1.3x speedup, drastic reduction in memory footprint from O(n) to O(sqrt(n)) and improvement in empirical time complexity, by postponing the addition of primes to the dict until their square is seen in the input. Test it ...
Is Java really slow?
...ntributed to the "Java is slow" reputation:
Before JIT compilation (Java 1.2/1.3), the language was only interpreted, not compiled, and thus very slow.
JIT compilation took time to become efficient (major improvements with each version)
Classloading has become a lot more efficient over the years. ...
Using git repository as a database backend
...──────┼─────────┤
│ MusicBrainz │ 1.2M │ 1K/week │ 30 GiB │ 20 GiB │
│ en.wikipedia │ 21.5M │ 133K/month │ 3 TiB │ 44 GiB │
│ OSM │ 1.7M │ 21K/month │ 726 GiB │ 480 GiB │
Obviously, for that amounts...
How to find list of possible words from a letter matrix [Boggle Solver]
...ore I got to the real work of the code, and reducing input time from 2s to 1.2s means a lot to me.
– Kent Fredric
Apr 14 '09 at 10:04
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How to choose an AES encryption mode (CBC ECB CTR OCB CFB)?
... with 2^128 elements. Its wide use in important network standards like TLS 1.2 is reflected by a special instruction Intel has introduced to speed up the calculation of GHASH.
Recommendation:
Considering the importance of authentication I would recommend the following two block cipher modes for mos...
Callback functions in C++
...e v) { std::cout << v << " "; });
which prints
5 6.2 8 9.5 11.2
Another application of callbacks is the notification of callers of certain events which enables a certain amount of static / compile time flexibility.
Personally, I use a local optimization library that uses two differ...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...1.1 将这个request从所在的message中摘下来(request_list_node)
1.2. 回调应用层传入的process：
process函数返回EASY_OK, 则说明应用已经处理完了这个请求了(这种情况出现在当OceanBase 0.4接收到了一个大于2MB的包的时候)，接着调用easy...