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Histogram Matplotlib
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import matplotlib.pyplot as plt
import numpy as np
mu, sigma = 100, 15
x = mu + sigma * np.random.randn(10000)
hist, bins = np.histogram(x, bins=50)
width = 0.7 * (bins[1] - bins[0])
center = (bins[:-1] + bins[1:]) / 2
plt.bar(center, hist, align='center', width=width)
plt.show()
The...
possible EventEmitter memory leak detected
...Listeners via:
const emitter = new EventEmitter()
emitter.setMaxListeners(100)
// or 0 to turn off the limit
emitter.setMaxListeners(0)
But if it's not your code you can use the trick to increase the default limit globally:
require('events').EventEmitter.prototype._maxListeners = 100;
Of cours...
MQTT与TCP的区别 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...的消息服务质量。提供不同等级的“服务质量”。
协议位置TCP是OSI第四层的传输层协议。MQTT是基于TCP的七层应用层协议。
协议定位TCP设计考虑的是面向连接的、可靠的、基于字节流的传输层通信协议。MQTT则是在低带宽高延...
Can I serve multiple clients using just Flask app.run() as standalone?
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What if I am looking at a max of 100 users? Can I just assign processes=100 and be happy with it? In my case, I only need static files, no HTTP Post methods. My requirement is, I want to run all Flask threads as part of my parent app, so that they all can sh...
reformat in vim for a nice column layout
...t the macro for all remaining lines.
Copy/pasted from that answer:
qa0f:w100i <Esc>19|dwjq4@a
Note the single space after the 100i, and the <Esc> means "press escape"--don't type "<Esc>" literally.
Translation:
qa -- record macro in hotkey a
0 -- go to beginn...
Inject service in app.config
...but I have successfully injected a service into a config block. (AngularJS v1.0.7)
angular.module('dogmaService', [])
.factory('dogmaCacheBuster', [
function() {
return function(path) {
return path + '?_=' + Date.now();
};
}
]);
angul...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...已经处理的请求数
3.3 初始化成员变量listen_watcher, 每100ms触发一次对于listen的切换(回调函数easy_connection_on_listen)，实际上，在刚启动的时候，是100ms，当有IO线程抢到listen的权利后，这个timer会被改成60s，随后，每60s进行一次li...
Bootstrap datepicker hide after selection
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There's a version 2? I see v1.6.4 as the latest release on Github
– garryp
Oct 25 '16 at 12:21
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Difference between Math.Floor() and Math.Truncate()
...divide trickery to achieve the same effect:
c = System.Math.Truncate (n * 100) / 100; // 3.14
d = System.Math.Ceiling (n * 100) / 100; // 3.15
share
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improv...
Shell command to sum integers, one per line?
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I have a file with 100 million numbers. The awk command takes 21s; the paste command takes 41s. But good to meet 'paste' nevertheless!
– Abhi
Jan 25 '13 at 6:07
...