大约有 45,300 项符合查询结果（耗时：0.0453秒） [XML]
搭建高可用mongodb集群（三）—— 深入副本集内部机制 - 大数据 & AI - 清...
...nCommand({replSetStepDown : 1, force : true})
或者使用 rs.stepDown(120)也可以达到同样的效果，中间的数字指不能在停止服务这段时间成为主节点，单位为秒。
设置一个从节点有比主节点有更高的优先级。
先查看当前集群中优先级，通...
Is it possible to for SQL Output clause to return a column not being inserted?
...
2 Answers
2
Active
...
Convert to/from DateTime and Time in Ruby
... in a
# fraction of a day.
offset = Rational(utc_offset, 60 * 60 * 24)
DateTime.new(year, month, day, hour, min, seconds, offset)
end
end
Similar adjustments to Date will let you convert DateTime to Time .
class Date
def to_gm_time
to_time(new_offset, :gm)
end
def to_l...
SQL query to find record with ID not in another table
...
216
Try this
SELECT ID, Name
FROM Table1
WHERE ID NOT IN (SELECT ID FROM Table2)
...
Difference between Xcode version (CFBundleShortVersionString) and build (CFBundleVersion)
...
|
edited Jul 20 '12 at 17:36
answered Jul 30 '11 at 6:10
...
Python: How do I make a subclass from a superclass?
...ven better, the use of Python's built-in function, super() (see the Python 2/Python 3 documentation for it) may be a slightly better method of calling the parent for initialization:
# Better initialize using Parent (less redundant).
#
class MySubClassBetter(MySuperClass):
def __init__(self):
...
What does “#define _GNU_SOURCE” imply?
...OURCE, but you should avoid defining it and instead define _POSIX_C_SOURCE=200809L or _XOPEN_SOURCE=700 when possible to ensure that your programs are portable.
In particular, the things from _GNU_SOURCE that you should never use are #2 and #4 above.
...
Vertically aligning CSS :before and :after content [duplicate]
...
128
Answered my own question after reading your advice on the vertical-align CSS attribute. Thanks ...
Do Facebook Oauth 2.0 Access Tokens Expire?
I am playing around with the Oauth 2.0 authorization in Facebook and was wondering if the access tokens Facebook passes out ever expire. If so, is there a way to request a long-life access token?
...
Using fonts with Rails asset pipeline
...
12 Answers
12
Active
...