大约有 44,000 项符合查询结果（耗时：0.0388秒） [XML]
How good is Java's UUID.randomUUID?
... UUIDs which need to be generated in order to have a 50% probability of at least one collision is 2.71 quintillion, computed as follows:
...
This number is equivalent to generating 1 billion UUIDs per second for about 85 years, and a file containing this many UUIDs, at 16 bytes per UUID, would be ab...
nonlocal keyword in Python 2.x
...ou would like to create a working example on pyfiddle. It would require at least two additional lines. Can't picture how you would do it without more clutter.
– Bob Stein
Sep 2 '18 at 21:20
...
Split value from one field to two
...th a character search.
If, for some reason you cannot split the field, at least put in the extra columns and use an insert/update trigger to populate them. While not 3NF, this will guarantee that the data is still consistent and will massively speed up your queries. You could also ensure that the e...
An efficient way to transpose a file in Bash
...
@lalebarde At least in the implementation of rs that comes with OS X, -c alone sets the input column separator to a tab.
– nisetama
Mar 5 '16 at 12:20
...
How do I copy an entire directory of files into an existing directory using Python?
...would have a problem with a pre-existing dir. This needs to be changed. At least provide an exist_ok=False parameter to the call
– cfi
Sep 26 '12 at 16:05
6
...
How to create a fixed-size array of objects
...s is (1) very uncomfortable to use and (2) memory layout is undefined. (at least unknown to me)
share
|
improve this answer
|
follow
|
...
How to handle configuration in Go [closed]
...
It seems that JSON is the least bad of the current alternatives. I looked into go-yaml and it's a valiant effort, but i took the lack of documentation as an indication that i should look elsewhere. goini seems to be a simple and easy library to handle...
What's the best way to do a backwards loop in C/C#/C++?
...p that goes backwards through a collection.
It's so easy to get wrong (at least for me), that I thought putting this snippet in would be a good idea.
That said, I like Array.Reverse() / Enumerable.Reverse() and then iterate forwards better - they more clearly state intent.
...
What's Up with Logging in Java? [closed]
... define "effectively" though. It would certainly emit the same message (at least if entry and object are the same ;)) so please forgive my nitpicking.
– Huxi
Jun 3 '09 at 3:32
6
...
FileSystemWatcher vs polling to watch for file changes
...f events in quick succession. If you cannot execute your event handler at least as quickly as they are being fired, eventually the handler will start dropping events on the floor and you will miss things.
– Brent Rockwood
Feb 3 '12 at 12:39
...