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RegEx for Javascript to allow only alphanumeric
...
/^[a-z0-9]+$/i
^ Start of string
[a-z0-9] a or b or c or ... z or 0 or 1 or ... 9
+ one or more times (change to * to allow empty string)
$ end of string
/i case-insensitive
Update (supporting ...
OfflineSpeech 拓展：离线语音识别 · App Inventor 2 中文网
... Vosk(Kaldi)。
默认中文小模型开箱即用（vosk-model-small-cn-0.22，zip 约 42MB，Apache 2.0 开源协议）：调用 LoadDefaultModel 即可——本地已有缓存就直接加载；没有就首次联网自动下载并缓存（进度经 ModelProgress 事件提示），之后全程离...
Initializing a struct to 0
...ves less typing), and it is guaranteed to work, all members will be set to 0[Ref 1].
The second is more readable.
The choice depends on user preference or the one which your coding standard mandates.
[Ref 1] Reference C99 Standard 6.7.8.21:
If there are fewer initializers in a brace-e...
Hadoop “Unable to load native-hadoop library for your platform” warning
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230
I assume you're running Hadoop on 64bit CentOS. The reason you saw that warning is the native Ha...
How to center align the cells of a UICollectionView?
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80
I think you can achieve the single line look by implementing something like this:
- (UIEdgeInse...
WebSocket客户端使用指导 · App Inventor 2 中文网
...已断开时」里延时几秒再连即可（主动断开时状态码是 1000，不重连）：
when WebSocket客户端1.Disconnected(状态码, 原因) {
if (状态码 != 1000) {
after(3000) {
WebSocket客户端1.Connect()
}
}
}
收发 JSON：服务器发来的多是 JSON 文...
HTML5 Pre-resize images before uploading
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10 Answers
10
Active
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CentOS+Nginx+PHP+MySQL详细配置(图解) - 更多技术 - 清泛网 - 专注C/C++及内核技术
...贴出来，就不做过多的讲解了
#useradd mysql
#tar zxvf mysql-5.0.40.tar.gz
#cd mysql-5.0.40
#./configure --prefix=/usr/local/mysql
#make && make install
#/usr/local/mysql/bin/mysql_install_db --user=mysql //初始化MySQL数据库
#chown -R mysql /usr/local/mysql/var
#/usr...
Reverse Range in Swift
...:to:by:) is similar but excludes the last value
for i in stride(from:5,to:0,by:-1) { print(i) } // 5 4 3 2 1
Update For latest Swift 2
First of all, protocol extensions change how reverse is used:
for i in (1...5).reverse() { print(i) } // 5 4 3 2 1
Stride has been reworked in Xcode 7 Beta 6. ...
How to remove space between axis & area-plot in ggplot2?
... to expand the scale by 5% on each side for
continuous variables, and by 0.6 units on each side for discrete
variables.
The problem is thus solved by adding expand = c(0,0) to scale_x_continuous and scale_y_continuous. This also removes the need for adding the panel.margin parameter.
The code...