大约有 7,554 项符合查询结果（耗时：0.0127秒） [XML]
Case objects vs Enumerations in Scala
...ration.Value, thus 1) requiring scala-library, 2) losing the actual type information.
– juanmirocks
Oct 24 '12 at 9:09
7
...
Is non-blocking I/O really faster than multi-threaded blocking I/O? How?
...lso using an additional thread. As you stated for best overall (system) performance I guess it would be better to use asynchronous I/O and not multiple threads (so reducing thread switching).
Let's look at possible implementations of a network server program that shall handle 1000 clients connected...
How is this fibonacci-function memoized?
...f the versions above are in fact independent of the outer n binding, to perform the lambda lifting after all, resulting in full memoization (except for the polymorphic definitions). In fact that's exactly what happens with all three versions when declared with monomorphic types and compiled with -O2...
How to turn on (literally) ALL of GCC's warnings?
...at's not usually useful is -Wtraditional, which warns about perfectly well formed code that has a different meaning (or doesn't work) in traditional C, e.g. "string " "concatenation", or ISO C function definitions! Do you really care about compatibility with 30 year old compilers? Do you really wan...
What is the best Battleship AI?
... Actually, this answer is nice because it shows in a very concise form the API's you'd need to implement to compete... :)
– dicroce
Oct 27 '09 at 15:51
1
...
Parameterize an SQL IN clause
...rs.AddWithValue("@tags", string.Join("|", tags);
}
Two caveats:
The performance is terrible. LIKE "%...%" queries are not indexed.
Make sure you don't have any |, blank, or null tags or this won't work
There are other ways to accomplish this that some people may consider cleaner, so please kee...
Java inner class and static nested class
...r class definition and its single instantiation into one convenient syntax form, and it would also be nice if we didn't have to think up a name for the class (the fewer unhelpful names your code contains, the better). An anonymous inner class allows both these things:
new *ParentClassName*(*constru...
What is the purpose of setting a key in data.table?
...operations, setkey() was never an absolute requirement. That is, we can perform a cold-by or adhoc-by.
## "cold" by
require(data.table)
DT <- data.table(x=rep(1:5, each=2), y=1:10)
DT[, mean(y), by=x] # no key is set, order of groups preserved in result
However, prior to v1.9.6, joins of the ...
WebSockets protocol vs HTTP
...on handshakes, but with a WebSocket connection the initial handshake is performed once and then small messages only have 6 bytes of overhead (2 for the header and 4 for the mask value). The latency overhead is not so much from the size of the headers, but from the logic to parse/handle/store those h...
How do I create a simple 'Hello World' module in Magento?
...er possible, try to use the model objects the system provides to get the information you need. I know it's all there in the SQL tables, but it's best not to think of grabbing data using raw SQL queries, or you'll go mad.
Final disclaimer. I've been using Magento for about two or three weeks, so cav...