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关于消息体大小的限制，文档中没有描述这个限制，但是每个MQTT平台应该是有限制的，经过实际测试befa.com平台，base64文本大小约100KB以内的消息订阅可以正常接收，超过则无法接收。建议你自己的平台也进行一下测试，如果有...
surface plots in matplotlib
... nv = 50
u = np.linspace(0, 2*np.pi, nu,)
v = np.linspace(0, np.pi, nv,)
xx = np.zeros((nu,nv),dtype='d')
yy = np.zeros((nu,nv),dtype='d')
zz = np.zeros((nu,nv),dtype='d')
# populate x,y,z arrays
for i in range(nu):
for j in range(nv):
xx[i,j] = np.sin(v[j])*np.cos(u[i])
yy[i,j] = np.si...
URL Fragment and 302 redirects
...nts from Section 7.1.2. Location:
If the Location value provided in a 3xx (Redirection) response does
not have a fragment component, a user agent MUST process the
redirection as if the value inherits the fragment component of the URI
reference used to generate the request target (i.e., the...
解决：CTreeCtrl控件SetCheck无效的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
...究竟是什么时候修改了我们设置的
check状态，我在其他消息响应函数中进一步用GetCheck检查，发现对话框在第一次OnPaint的时候
，树控件根节点的check状态还是选中的，但紧接着下个消息来到后，它的状态就发生了改变。我
思...
C# Stream流使用总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...Socket中的流
if (netStream.DataAvailable) //如果客户端发送了消息
{
byte[] data = new byte[1024]; //定义一个字节数组，用来存放接收的数据
int len = netStream.Read(data, 0, data.Length); //从位置开始，读取到字节数组末尾
string line = Enco...
How to put the legend out of the plot
...t.legend
matplotlib.font_manager
set_size(self, size)
Valid font size are xx-small, x-small, small, medium, large, x-large, xx-large, larger, smaller, None
Real Python: Python Plotting With Matplotlib (Guide)
import matplotlib.pyplot as plt
from matplotlib.font_manager import FontProperties
f...
How to set up Android emulator proxy settings
... Target > Additional Emulator Command Line Options: -http-proxy http://xx.xxx.xx.xx:8080
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An error occurred while validating. HRESULT = '8000000A'
...t I have to create/change some weird key under HKEY_USERS HKEY_USERS\S-1-5-xx-xxxxxxxxxx-xxxxxxxxx-xxxxxxxxxxx-xxxxx\...\MSBuild
But I also found that if I will be using a CMD console for HKCU with the proposed fix
REG ADD HKCU\SOFTWARE\Microsoft\VisualStudio\14.0_Config\MSBuild /t REG_DWORD /v Enab...
Android Min SDK Version vs. Target SDK Version
...
When you set targetSdkVersion="xx", you are certifying that your app works properly (e.g., has been thoroughly and successfully tested) at API level xx.
A version of Android running at an API level above xx will apply compatibility code automatically to s...
How to export all collections in MongoDB?
...ou are dealing with a remote password protected database
mongodump --host xx.xxx.xx.xx --port 27017 --db your_db_name --username your_user_name --password your_password --out /target/folder/path
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