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...概有这些,a)被调用方的结果返回,会涉及进程线程间通信的问题。b)如果程序需要回滚,回滚会有点复杂。c)异步通常都会伴随多线程多进程,并发的控制也相对麻烦一些。d)很多异步系统都用消息机制,消息的丢失和乱...
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Why does Hibernate require no argument constructor?

...ased mapping - maybe what you would like ? - because of some issues like 1º What happens whether your class contains a lot of constructors public class Person { private String name; private Integer age; public Person(String name, Integer age) { ... } public Person(String name) {...
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Improving bulk insert performance in Entity framework [duplicate]

... answered Nov 6 '13 at 12:21 Måns TånnerydMåns Tånneryd 47344 silver badges88 bronze badges ...
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How many files can I put in a directory?

...ld answer, I know… but when you write EXT4 – Maximum number of files: 2³² - 1 (4,294,967,295) and Maximum number of files per directory: unlimited you really confused me because 2³² - 1 != “unlimited”. I guess I need a coffee now. ;) Nevertheless +1 – e-sushi ...
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Difference between single and double square brackets in Bash

...d1 && cmd2 [ a = a -a b = b ]: equivalent, but deprecated by POSIX³ [ a = a ] && [ b = b ]: POSIX and reliable equivalent ( [[ (a = a || a = b) && a = b ]]: false [ ( a = a ) ]: syntax error, () is interpreted as a subshell [ \( a = a -o a = b \) -a a = b ]: equivalent, ...
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DateTime.ToString(“MM/dd/yyyy HH:mm:ss.fff”) resulted in something like “09/14/2013 07.20.31.371”

... answered Sep 2 '15 at 8:06 Håkon SeljåsenHåkon Seljåsen 46744 silver badges1212 bronze badges ...
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In C# check that filename is *possibly* valid (not that it exists) [duplicate]

... edited Apr 30 '17 at 0:51 buræquete 12.5k44 gold badges3131 silver badges6262 bronze badges answered Jan 7 '09 at 21:11 ...
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Difference between InvariantCulture and Ordinal string comparison

...iosyncrasies out there. Ordinal 0 9 A Ab a aB aa ab ss Ä Äb ß ä äb ぁ あ ァ ア 亜 A IgnoreCase 0 9 a A aa ab Ab aB ss ä Ä äb Äb ß ぁ あ ァ ア 亜 A -------------------------------------------------------------------- InvariantCulture 0 9 a A A ä Ä aa ab aB ...
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What's the difference between UTF-8 and UTF-8 without BOM?

...nded but it did wonders to my powershell script when trying to output "æøå" – Marius Nov 12 '13 at 9:22 63 ...
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Is there a way to make R beep/play a sound at the end of a script?

...ered Jul 1 '14 at 18:08 Rasmus BååthRasmus Bååth 3,62222 gold badges2121 silver badges2525 bronze badges ...