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Most efficient way to reverse a numpy array
Believe it or not, after profiling my current code, the repetitive operation of numpy array reversion ate a giant chunk of the running time. What I have right now is the common view-based method:
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Show just the current branch in Git
I tried looking for a special Git command for this, but I couldn't find one. Is there anything shorter or faster than the following?
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How to combine two or more querysets in a Django view?
...sets into a list is the simplest approach. If the database will be hit for all querysets anyway (e.g. because the result needs to be sorted), this won't add further cost.
from itertools import chain
result_list = list(chain(page_list, article_list, post_list))
Using itertools.chain is faster than...
Discuz轻松生成sitemaps.xml网站地图 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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PS：注意编码，选择自己DZ对应的编码，我自己用的是UTF-8版本DZ
<?php
if(!defined('IN_DISCUZ')) {
exit('Access Denied');
}
$filename='sitemaps.xml';
//以下五项根据具体情况修改即可
$cfg_updateperi='60';//协议文件更新周期的上限，单位为分...
任何组件块 · App Inventor 2 中文网
...码更通用。
例如，这允许您创建一个按钮列表并使用 for-each 循环一次更新它们的所有属性，例如：
图 1. 使用循环隐藏列表中所有按钮的例子
三种主要组件块类型（即事件、方法和属性）中的每一种都具有相应的“任何组...
nFC Connect低功耗蓝牙APP工具的使用 - 创客硬件开发 - 清泛IT社区，为创新赋能！
nRF Connect是一款由NORDIC开发的专门用于低功耗蓝牙测试APP，仅支持安卓平台。这款APP可以扫描和探索低功耗蓝牙设备，并与它们进行通信。它支持许多蓝牙 SIG 采用的配置文件，以及Nordic Semiconductor或Google的Eddystone的设备固件更新...
ble 蓝牙透传代码怎么写？ - 创客硬件开发 - 清泛IT社区，为创新赋能！
...个模块这个地址可以吗？
上图中是控制服务id：SERVICEF000_UUUID = UUID.fromString("0000f000-0000-1000-8000-00805f9b34fb");以及2个控制端口的特征id。
可以做到透传，不过要换透传 id，这个 id 是 io 控制口
晚一些我给你一下 透传 id...
代码块测试 - App Inventor 2 离线版 - 清泛IT社区，为创新赋能！
.../1999/xhtml"><block type="component_event" id="v=f9{T,j}`%n4Ix;zwlz" x="20" y="40"><mutation component_type="Form" is_generic="false" instance_name="Screen1" event_name="Initialize"></mutation>&...
Haskell error parse error on input `='
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"Learn you Haskell" doesn't mention this at all.
– Bakuriu
Jun 1 '13 at 7:40
2
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Submit HTML form on self page
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In 2013, with all the HTML5 stuff, you can just omit the 'action' attribute to self-submit a form
<form>
Actually, the Form Submission subsection of the current HTML5 draft does not allow action="" (empty attribute). It is against...