大约有 30,000 项符合查询结果（耗时：0.0618秒） [XML]
What is the difference between save and insert in Mongo DB?
...is essentially the same.
save behaves differently if it is passed with an "_id" parameter.
For save, If the document contains _id, it will upsert querying the collection on the _id field, If not, it will insert.
If a document does not exist with the specified _id value, the save() method performs a...
Access denied for user 'root@localhost' (using password:NO)
... |
edited Jun 8 '10 at 7:32
answered Jun 8 '10 at 5:54
Boz...
[科普] __MACOSX是什么文件夹？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
[科普] __MACOSX是什么文件夹？（如图，一般的设计源文件都会有__MACOSX这个目录）以下为网上搜到的资料：MacOS作为他们的开发环境。例如，许多来自领先的网络框架组织的...
（如图，一般的设计源文件都会有__MACOSX这个目录）
...
What is scope/named_scope in rails?
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
Why is whitespace sometimes needed around metacharacters?
...
Charles Duffy
218k3232 gold badges273273 silver badges333333 bronze badges
answered Jan 17 '14 at 13:09
Peter WestlakeP...
Changing MongoDB data store directory
...
Dan Dascalescu
98.3k3636 gold badges263263 silver badges333333 bronze badges
answered May 11 '11 at 8:25
Brendan W. McAdamsBrendan W. McAda...
String, StringBuffer, and StringBuilder
...e, at the 17th character the backing Array gets re-allocated and copied to 32 characters, at the 33th character this happens again and you get to re-allocated and copy the Array into 64 characters. You can see how this degenerates to lots of re-allocations and copies which is what you really are try...
How to get a random number in Ruby
... a range, actually. (Since 1.9.3, I believe.)
– Ajedi32
Jan 2 '15 at 19:56
|
show 8 more comments
...
Proper way to use **kwargs in Python
...icular default value, why not use named arguments in the first place?
def __init__(self, val2="default value", **kwargs):
share
|
improve this answer
|
follow
...
Proper way to renew distribution certificate for iOS
My distribution certificate is expiring on June 7th, along with all of my provisioning files. How do I properly renew it? Should I revoke it now and request a new one? If I do that than will all my live apps be taken down?
...