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App Inventor 2 连接方式：AI伴侣、模拟器、USB · App Inventor 2 中文网
...求非常低，虚拟机也可正常使用，用户体验很不错！点此下载。
USB
aiStarter 启动USB调试
也是利用aiStarter启动USB调试，通过USB连接你的手机，自动启动你手机上的AI伴侣app进行测试。相当于用你手机扫了一次...
Django Setup Default Logging
...info("l2")
root.info("root logger")
Prints the following result:
[FMT1] 2018-12-18 17:24:47,691 l1
[FMT1] 2018-12-18 17:24:47,691 l2
[FMT1] 2018-12-18 17:24:47,691 root logger
indicating that configuration under root key has the highest priority. If the block is removed, the result is:
[FMT2] ...
linux 下巧妙使用squid代理服务器 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...胁的或不适宜的站点。
三、CDN简介：
文件下载加速服务：
四、Web缓存的类型和特点:
Web缓存的位置可以有三种，一是可以防止在客户端，二是放在服务器，三是放在客户端与服务器之间的某个网络节点上，这个...
Assign pandas dataframe column dtypes
...df = pd.DataFrame({'x': {0: 'a', 1: 'b'}, 'y': {0: '1', 1: '2'}, 'z': {0: '2018-05-01', 1: '2018-05-02'}})
df.dtypes
x object
y object
z object
dtype: object
df
x y z
0 a 1 2018-05-01
1 b 2 2018-05-02
You can apply these to each column you want to convert:
df["y"]...
Tab Vs Space preferences in Vim
... was a tab. which is a must for sane use.
– u0b34a0f6ae
Oct 15 '09 at 12:03
add a comment
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...
How to initialize all members of an array to the same value?
...et is the more elegant way to express it.
– u0b34a0f6ae
Oct 14 '09 at 10:41
49
If the data must b...
ZeroMQ实例-使用ZMQ(ZeroMQ)进行局域网内网络通信 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的消息发送和接收首先在机器中安装zmq库步骤如下：1）下载zeromq的源代码，Zer...本文内容摘要：1）安装zeromq、2）实例说明使用zmq进行网络间的消息发送和接收
首先在机器中安装zmq库
步骤如下：
1）下载zeromq的源代码，ZeroMQ...
莱昂氏unix源代码分析 PDF - 文档下载 - 清泛网 - 专注C/C++及内核技术
莱昂氏unix源代码分析 PDF莱昂 源代码本书由上、下两篇组成。上篇为UNIX版本6的源代码，下篇是莱昂先生对UNIX操作系统版本6源代码的详细分析。本书语言简洁、透彻，曾作为未公开...本书由上、下两篇组成。上篇为UNIX版本6的源...
Increase distance between text and title on the y-axis
...e margin on top, right, bottom, and left side of the element.
ggplot(mpg, aes(cty, hwy)) + geom_point()+
theme(axis.title.y = element_text(margin = margin(t = 0, r = 20, b = 0, l = 0)))
margin can also be used for other element_text elements (see ?theme), such as axis.text.x, axis.text.y and ...
Create a hexadecimal colour based on a string with JavaScript
...,"#FF029D","#FE8900","#7A4782","#7E2DD2","#85A900","#FF0056","#A42400","#00AE7E","#683D3B","#BDC6FF","#263400","#BDD393","#00B917","#9E008E","#001544","#C28C9F","#FF74A3","#01D0FF","#004754","#E56FFE","#788231","#0E4CA1","#91D0CB","#BE9970","#968AE8","#BB8800","#43002C","#DEFF74","#00FFC6","#FFE502"...