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App Inventor 2 文本代码块 · App Inventor 2 中文网
...则当一个key是另一个key的子串时，第一个被替换是较长的那个。
案例：文本转数字
App Inventor 2 是弱语言类型，文本和数字之间不用刻意去转换，之间赋值就可以了。文本赋值给数字变量如下：
运行结果：124
注意：数字变...
How do I measure separate CPU core usage for a process?
...
You can use:
mpstat -P ALL 1
It shows how much each core is busy and it updates automatically each second. The output would be something like this (on a quad-core processor):
10:54:41 PM CPU %usr %nice %sys %iowait %irq %s...
What text editor is available in Heroku bash shell? [closed]
...l gist into a heroku cli plugin.
Just install:
heroku plugins:install https://github.com/naaman/heroku-vim
And use:
heroku vim
The heroku vim command will drop you into a bash shell with vim installed on your $PATH. All you have to do is retrain your fingers to type heroku vim instead of heroku...
Reset C int array to zero : the fastest way?
...ee for floating-point or pointer types.)
– Keith Thompson
Jun 16 '13 at 0:17
3
Adding to @KeithTh...
马云谈湖北：这是最后一站 也是最有意义的一站 - 资讯 - 清泛网 - 专注C/C+...
马云谈湖北：这是最后一站 也是最有意义的一站11月25日消息，昨日，湖北省政府与阿里巴巴集团签署了合作协议。阿里巴巴集团董事局主席马云在会上谈及湖北时表示，“这是最后一站，最后一站也是最有意义的一站。”11月25...
What is the difference between a Docker image and a container?
...with docker images whereas you can see your running containers with docker ps (and you can see all containers with docker ps -a).
So a running instance of an image is a container.
share
|
improve t...
How can I change the color of my prompt in zsh (different from normal text)?
...
Here's an example of how to set a red prompt:
PS1=$'\e[0;31m$ \e[0m'
The magic is the \e[0;31m (turn on red foreground) and \e[0m (turn off character attributes). These are called escape sequences. Different escape sequences give you different results, from absolute cu...
大数据：用数据指导APP运营 - 资讯 - 清泛网 - 专注C/C++及内核技术
...品特性去设定需要获取哪些数据。
我们拿最近很火的那个App——足记来举个例子吧。
“足记”因为一个非核心功能火了，但作为这样的应用，它会关注哪些数据呢？
从产品的层面，它会去关注：
1）App每日的打开数
2）各...
Is Tomcat running?
...
Why grep ps, when the pid has been written to the $CATALINA_PID file?
I have a cron'd checker script which sends out an email when tomcat is down:
kill -0 `cat $CATALINA_PID` > /dev/null 2>&1
if [ $? -gt 0 ]
then
echo ...
How do you do a ‘Pause’ with PowerShell 2.0?
...ly excludes Shift, Alt, Ctrl modifier keys.
Disadvantage: Does not work in PS-ISE.
<2> ReadKey (RawUI)
Write-Host "Press any key to continue ..."
$x = $host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
Disadvantage: Does not work in PS-ISE.
Disadvantage: Does not exclude modifier keys.
&l...