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What is the “__v” field in Mongoose
I'm using Mongoose version 3 with MongoDB version 2.2. I've noticed a __v field has started appearing in my MongoDB documents. Is it something to do with versioning? How is it used?
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How to JSON serialize sets?
...owing that it can handle lists, dicts, and sets:
>>> data = [1,2,3, set(['knights', 'who', 'say', 'ni']), {'key':'value'}, Decimal('3.14')]
>>> j = dumps(data, cls=PythonObjectEncoder)
>>> loads(j, object_hook=as_python_object)
[1, 2, 3, set(['knights', 'say', 'who', 'n...
Split views.py in several files
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193
In Django everything is a Python module (*.py). You can create a view folder with an __init__.py...
How to print a query string with parameter values when using Hibernate
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30 Answers
30
Active
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How to achieve function overloading in C?
...n.
– Alexey Frunze
Oct 20 '11 at 10:34
13
No. printf is not function overloading. it uses vararg ...
How to extract the decision rules from scikit-learn decision-tree?
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143
I believe that this answer is more correct than the other answers here:
from sklearn.tree impor...
App Inventor 2 上传文件和图片到服务器教程 · App Inventor 2 中文网
... 1. 拍照后上传
2. 从相册选择图片后上传
3. 处理上传结果
方案二：Base64 编码上传
原理
组件准备
积木块代码
1. 读取文件并 Base64 编码上传
2. 处理上传结...
Asynchronous method call in Python?
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143
You can use the multiprocessing module added in Python 2.6. You can use pools of processes and t...
How to generate keyboard events in Python?
... using ctypes:
import ctypes
from ctypes import wintypes
import time
user32 = ctypes.WinDLL('user32', use_last_error=True)
INPUT_MOUSE = 0
INPUT_KEYBOARD = 1
INPUT_HARDWARE = 2
KEYEVENTF_EXTENDEDKEY = 0x0001
KEYEVENTF_KEYUP = 0x0002
KEYEVENTF_UNICODE = 0x0004
KEYEVENTF_SCANCODE =...
VS Debug调试模式下内存泄露检测原理 - C/C++ - 清泛网 - 专注C/C++及内核技术
...中，内存块号也就是内存在第几次中分配，如下所示的{354}就是内存块号。
Detected memory leaks!
Dumping objects ->
d:\local\project\test.cpp(278) : {354} normal block at 0x003FDAB8, 44 bytes long.
Data: < P- P- > 80 00 E4 00 50 2D E5 00 50 2D E5 00 CD CD CD CD...