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搭建高可用mongodb集群（一）——配置mongodb - 大数据 & AI - 清泛网 - 专...
...！
[initandlisten] db version v2.4.6
……..
[initandlisten] waiting for connections on port 27017
[websvr] admin web console waiting for connections on port 28017
mongodb默认自带提供了web访问接口，通过 IP + 端口的形式可以访问。
http://192.168.0.1:28017/
二、主...
How to programmatically show next view in ViewPager?
...
Unfortunately I do get different behavior, when the user swipes manually and when I jump using setCurrentItem. The order of calls is reversed. When I swipe, it first calls OnPageChangeListener#onPageSelected and then it calls s...
Redirecting stdout to “nothing” in python
...
Cross-platform:
import os
import sys
f = open(os.devnull, 'w')
sys.stdout = f
On Windows:
f = open('nul', 'w')
sys.stdout = f
On Linux:
f = open('/dev/null', 'w')
sys.stdout = f
...
How does Python's super() work with multiple inheritance?
...ttempts).
In your example, Third() will call First.__init__. Python looks for each attribute in the class's parents as they are listed left to right. In this case, we are looking for __init__. So, if you define
class Third(First, Second):
...
Python will start by looking at First, and, if Fi...
How to implement “select all” check box in HTML?
...ction toggle(source) {
checkboxes = document.getElementsByName('foo');
for(var checkbox in checkboxes)
checkbox.checked = source.checked;
}
</script>
<input type="checkbox" onClick="toggle(this)" /> Toggle All<br/>
<input type="checkbox" name="foo" value="bar1"> Bar...
Multiple constructors in python? [duplicate]
...ng makes it hard to figure out what kind of object was actually passed in. For example: if you want to take either a filename or a file-like object you cannot use isinstance(arg, file) because there are many file-like objects that do not subclass file (like the ones returned from urllib, or StringIO...
Using module 'subprocess' with timeout
...rocess timeout support exists in the subprocess32 backport that I maintain for use on Python 2. pypi.python.org/pypi/subprocess32
– gps
Dec 9 '12 at 4:07
...
C# Lazy Loaded Automatic Properties
...ssion is called. It will only be calculated once and will cache the value for future uses of the Value property
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Multiple Models in a single django ModelForm?
Is it possible to have multiple models included in a single ModelForm in django? I am trying to create a profile edit form. So I need to include some fields from the User model and the UserProfile model. Currently I am using 2 forms like this
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How to easily map c++ enums to strings
...ly. (No point in copying your string literals to std::strings in the map)
For extra syntactic sugar, here's how to write a map_init class. The goal is to allow
std::map<MyEnum, const char*> MyMap;
map_init(MyMap)
(eValue1, "A")
(eValue2, "B")
(eValue3, "C")
;
The function templ...