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Is there a simple, elegant way to define singletons? [duplicate]
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I don't really see the need, as a module with functions (and not a class) would serve well as a singleton. All its variables would be bound to the module, which could not be instantiated repeatedly anyway.
If you do wish to use a cla...
Under what conditions is a JSESSIONID created?
...context will not be directly visible in another.
So when you first hit a site, a new session is created and bound to the SevletContext. If you deploy multiple applications, the session is not shared.
You can also invalidate the current session and therefore create a new one. e.g. when switching f...
RegEx match open tags except XHTML self-contained tags
...ustralian federal Representatives, which I got off of the Parliament's web site. This was a limited, one-time job.
Regexes worked just fine for me, and were very fast to set up.
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String to Dictionary in Python
...e fix. I'm trying to use Facebook's Authentication to register users on my site, and I'm trying to do it server side. I've gotten to the point where I get my access token, and when I go to:
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BLE（一）概述&工作流程&常见问题 - 创客硬件开发 - 清泛IT社区，...
文章源自：https://www.gandalf.site/2018/11/ble.html
0x1 BLE概述“蓝牙”，即Bluetooth，是斯堪的纳维亚语中 Blåtand / Blåtann 的英化版本。该词是十世纪的一位国王Harald Bluetooth的绰号，相传他将纷争不断的丹麦部落统一为一个王国，并引...
What is Android keystore file, and what is it used for?
...with the same key).
From The App-Signing Guide of the Android Developer's site:
In general, the recommended strategy for all developers is to sign all of your applications with the same certificate, throughout the expected lifespan of your applications. There are several reasons why you should ...
Difference between String replace() and replaceAll()
What's the difference between java.lang.String 's replace() and replaceAll() methods,
other than later uses regex? For simple substitutions like, replace . with / ,
is there any difference?
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Iterate over object attributes in python
...foo = 1
... bar = 'hello'
... def func(self):
... return 'call me'
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>>> obj = Cls()
calling dir on the object gives you back all the attributes of that object, including python special attributes. Although some object attributes are callable, such as methods.
>>&...
How do I POST JSON data with cURL?
...do this once, though, to set a default, of add config files per-method per-site: Setting default RESTY options
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Class with Object as a parameter
... Table to be a new-style class (as opposed to "classic" class).
In Python3 all classes are new-style classes, so this is no longer necessary.
New style classes have a few special attributes that classic classes lack.
class Classic: pass
class NewStyle(object): pass
print(dir(Classic))
# ['__doc__...