大约有 3,285 项符合查询结果（耗时：0.0338秒） [XML]
SortedList, SortedDictionary and Dictionary
... SortedDictionary(TKey,
TValue).
SortedDictionary(TKey, TValue) has faster insertion and removal
operations for unsorted data: O(log n) as opposed to O(n) for
SortedList(TKey, TValue).
If the list is populated all at once from sorted data,
SortedList(TKey, TValue) is faster than So...
What is the fastest way to get the value of π?
I'm looking for the fastest way to obtain the value of π, as a personal challenge. More specifically, I'm using ways that don't involve using #define constants like M_PI , or hard-coding the number in.
...
IllegalArgumentException or NullPointerException for a null parameter? [closed]
... JDK and Effective Java preference of NullPointerException. If you're steadfast in your belief that IAE is right, you still have checkArgument(arg != null), just without the convenience of it returning arg, or you can create a local utility to your project." code.google.com/p/guava-libraries/wiki/I...
How to speed up insertion performance in PostgreSQL
...h reliable, power-protected write-back caches make commit rates incredibly faster. They're less beneficial when you follow the advice above - which reduces disk flushes / number of fsync()s - but can still be a big help. Do not use cheap SSDs without proper power-failure protection unless you don't ...
Does pandas iterrows have performance issues?
...ectorized in obvious ways. Furthermore, on a smallish DataFrame, it may be faster to use other methods.
3) apply usually can be handled by an iterator in Cython space. This is handled internally by pandas, though it depends on what is going on inside the apply expression. For example, df.apply(lamb...
Force “git push” to overwrite remote files
... any of the following:
git push documentation
Git: How to ignore fast forward and revert origin [branch] to earlier commit?
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What exactly is metaprogramming?
...and what it meant. In Ansi
Common Lisp I tried to move things
along as fast as I could, and even so
I didn't get to macros until page 160.
But I think I can give a kind of
argument that might be convincing. The
source code of the Viaweb editor was
probably about 20-25% macros. Macro...
What's the best manner of implementing a social activity stream? [closed]
...n't really limiting. And with correct indices on the table the lookups are fast.
With this design you would have to decide what metadata each type of event should require. For example a feed activity for a new photo could look something like this:
{id:1, userId:1, type:PHOTO, time:2008-10-15 12:00...
Linux: is there a read or recv from socket with timeout?
...elect, pselect, poll, has a timeout field, but using of them disables "tcp fast-path" in tcp reno stack.
5 Answers
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MongoDB vs. Cassandra [closed]
...stant time reads & writes) dynamo/google bigtable hybrid that features fast writes regardless of data size. It's feature set is minimalistic, little beyond that of an ordered key value store. MongoDB is a heavily featured (and fast) document store at the cost of durability and guarantees about w...