大约有 11,643 项符合查询结果（耗时：0.0220秒） [XML]
Distributed sequence number generation?
...ber.
For example, node 1 generates sequence 001-00001 001-00002 001-00003 etc. and node 5 generates 005-00001 005-00002
Unique :-)
Alternately if you want some sort of a centralized system, you could consider having your sequence server give out in blocks. This reduces the overhead significantly...
MySQL, Check if a column exists in a table with SQL
...ve to wrap the whole thing in a procedure which allows statements like IF, etc. See stackoverflow.com/questions/7384711/… for an example of how to wrap a procedure around the test for the column and the conditional DML statement.
– Christopher Schultz
Jul 23 ...
NoSql vs Relational database
... Semi-structured data is one such class. It contains XML, Emails, JSON, etc. See the wikipedia page on it. The general rule is that the structure is there, but is loosely defined and dynamically extensible (the latter tend to class with the relational model - and while it is not impossible to mo...
Responsive image map
....if we place another image then its not working for second and third image etc...just check it..
– User2413
Nov 3 '14 at 9:41
1
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How to choose an AES encryption mode (CBC ECB CTR OCB CFB)?
...odium. Using such a library you do not have to care about encryption modes etc. but you have to be even more careful about the usage details than with a higher level abstraction, like never using a nonce twice.
If for some reason you cannot use a high level crypto library, for example because you ne...
Error - Unable to access the IIS metabase
...ons (config folder permissions, not use IIS, run VS as admin, restart IIS, etc.), but this was the only solution that worked for me. Thanks for sharing!
– Chris Knight
Nov 25 '14 at 19:14
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Locking a file in Python
.../ DOS systems.
try:
# Posix based file locking (Linux, Ubuntu, MacOS, etc.)
import fcntl, os
def lock_file(f):
fcntl.lockf(f, fcntl.LOCK_EX)
def unlock_file(f):
fcntl.lockf(f, fcntl.LOCK_UN)
except ModuleNotFoundError:
# Windows file locking
import msvcrt, os...
jQuery/Javascript function to clear all the fields of a form [duplicate]
... the $('#myForm').trigger("reset"); method to refresh/reset checkboxes and etc...!
– James111
Jun 20 '15 at 4:26
2
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Git SSH error: “Connect to host: Bad file number”
...
Maybe your firewall or a blocker application (PeerBlock etc.) is blocking your port
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How to force file download with PHP
...dd proper content type based on your file application/zip, application/pdf etc. - but only if you do not want to trigger the save-as dialog.
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