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搭建高可用mongodb集群（三）—— 深入副本集内部机制 - 大数据 & AI - 清...
...照一些属性来判断谁应该胜出。这个属性可以是一个静态ID，也可以是更新的度量像最近一次事务ID（最新的节点会胜出）。详情请参考NoSQL数据库分布式算法的协调者竞选还有维基百科的解释 。
选举 那mongodb是怎进行选举的呢...
Is it possible to get CMake to build both a static and shared version of the same library?
...ou'd go for static libraries. Furthermore, it is easier to distribute statically linked executables.
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How to reset radiobuttons in jQuery so that none is checked
... but slightly different things. If in this particular case, the advice provide above works if you use 1.6.1+. The above will not work with 1.6.0, if you are using 1.6.0, you should upgrade. If you want the details, keep reading.
Details: When working with straight HTML DOM elements, there are proper...
FIND_IN_SET() vs IN()
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SELECT name
FROM orders,company
WHERE orderID = 1
AND companyID IN (attachedCompanyIDs)
attachedCompanyIDs is a scalar value which is cast into INT (type of companyID).
The cast only returns numbers up to the first non-digit (a comma in your case).
Thus,
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How is std::function implemented?
...ally implemented by the compiler creating a class with overloaded function call operator and the referenced variables as members. This suggests that the size of lambda expressions varies, and given enough references variables that size can be arbitrarily large .
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Difference between CC, gcc and g++?
... AIX, the system C compiler goes by names such as 'xlc' or 'xlc32'.
Classically, the default system compiler was called 'cc' and self-configuring software falls back on that name when it doesn't know what else to use.
POSIX attempted to legislate its way around this by requiring the programs c89 (...
How do I find duplicates across multiple columns?
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Duplicated id for pairs name and city:
select s.id, t.*
from [stuff] s
join (
select name, city, count(*) as qty
from [stuff]
group by name, city
having count(*) > 1
) t on s.name = t.name and s.city = t.city
...
Is it safe to remove selected keys from map within a range loop?
...y := range (m) { if key % 2 == 0 { /* this is just some condition, such as calling expired */ delete(m, key); } }
– abanana
Jan 19 '17 at 15:40
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Change SQLite default settings
...
Put:
.headers on
.mode column
In a file called .sqliterc in the home directory of the user running sqlite.
(P.S. I found that in man sqlite3.)
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Converting a string to JSON object
...
{ "data": [ { id": - you are missing a double quote here, i.e. starting double quote of id
– Kshitij
Jun 11 '12 at 9:23
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