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How update the _id of one MongoDB Document?
...4d2d2a000002")})
// set a new _id on the document
doc._id = ObjectId("4c8a331bda76c559ef000004")
// insert the document, using the new _id
db.clients.insert(doc)
// remove the document with the old _id
db.clients.remove({_id: ObjectId("4cc45467c55f4d2d2a000002")})
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How do I concatenate strings and variables in PowerShell?
...$assoc.Owner)"
See the Windows PowerShell Language Specification Version 3.0, p34, sub-expressions expansion.
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TimeSpan ToString format
Just curious, is there a format string I can use to output something like "5h 3m 30s"?
7 Answers
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廉价共享存储解决方案1-drbd+ha+nfs - 更多技术 - 清泛网 - 专注C/C++及内核技术
...得无所适从而产生冲突。
另一种情况假如 tomact2,tomcat3同步tomcat1的目录，当tomcat1挂了之后，负载均衡会把访问分配到tomcat2和3，这个时候tomcat2和3彼此独立。客户分别对这两台机器进行读写于是数据又不同步了。
1.2 分布式...
Is False == 0 and True == 1 an implementation detail or is it guaranteed by the language?
... and boolean False are still properly returned for comparisons.
In Python 3.x True and False are keywords and will always be equal to 1 and 0.
Under normal circumstances in Python 2, and always in Python 3:
False object is of type bool which is a subclass of int:
object
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int
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bool
It...
Why does running the Flask dev server run itself twice?
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edited Nov 13 '17 at 13:15
answered Aug 26 '14 at 11:00
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Convert dd-mm-yyyy string to date
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329
Split on "-"
Parse the string into the parts you need:
var from = $("#datepicker").val().spl...
VS Debug调试模式下内存泄露检测原理 - C/C++ - 清泛网 - 专注C/C++及内核技术
...中，内存块号也就是内存在第几次中分配，如下所示的{354}就是内存块号。
Detected memory leaks!
Dumping objects ->
d:\local\project\test.cpp(278) : {354} normal block at 0x003FDAB8, 44 bytes long.
Data: < P- P- > 80 00 E4 00 50 2D E5 00 50 2D E5 00 CD CD CD CD...
python design patterns [closed]
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edited Dec 28 '18 at 23:32
community wiki
5...
setup.py examples?
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sudip
15399 bronze badges
answered Jan 19 '11 at 20:54
Rafe KettlerRafe Kettler
66.3k1...