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Why does JQuery have dollar signs everywhere?
... Unless you are using another language like PHP to populate javascript in your site using HTMLdocs, at which point that dollar sign serves the additional purpose of breaking everything since PHP does use the dollar sign to start all variables. (A reason that if you're sharing jQuery scrip...
Running script upon login mac [closed]
...ct Application
click Show library in the toolbar (if hidden)
add Run shell script (from the Actions/Utilities)
copy & paste your script into the window
test it
save somewhere (for example you can make an Applications folder in your HOME, you will get an your_name.app)
go to System Preferences -...
String comparison in Python: is vs. == [duplicate]
I noticed a Python script I was writing was acting squirrelly, and traced it to an infinite loop, where the loop condition was while line is not '' . Running through it in the debugger, it turned out that line was in fact '' . When I changed it to !='' rather than is not '' , it worked fine.
...
Tracking CPU and Memory usage per process
...e data for your inspection later. To do this, select "Performance Logs and Alerts" in the left-hand panel. (It's right under the System Monitor console which provides us with the above mentioned counters. If it is not there, click "File" > "Add/remove snap-in", click Add and select "Performance L...
When to use the different log levels
...
error:
Error conditions [but not critical].
"Premature end of script headers"
warn:
Warning conditions. [close to error, but not error]
notice:
Normal but significant [notable] condition.
"httpd: caught SIGBUS, attempting to dump core in ..."
info:
Informat...
How do I run a shell script without using “sh” or “bash” commands?
I have a shell script which I want to run without using the "sh" or "bash" commands. For example:
11 Answers
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How can I find out the current route in Rails?
...lt;/li>
<li role="presentation" class="<%= current_controller?('alerts') ? 'active' : '' %>">
<%= link_to alerts_path do %>
<i class="fa fa-bell-o"></i>
<% end %>
</li>
</ul>
For the users and alerts routes, current_page? would b...
Using semicolon (;) vs plus (+) with exec in find
...e of the last find implementations to support + (used to be a pain to port script to GNU systems).
– Stephane Chazelas
Feb 19 '14 at 14:30
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LEGO EV3 机器人传感器面板 · App Inventor 2 中文网
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项目概述
这是一个基于 MIT App Inventor 开发的 LEGO EV3 传感器监控应用。通过蓝牙连接手机与 EV3 机器人，实时显示颜色传感器、超声波传感器和触碰传感器的状态数据。
项目作者：CAVEDU Education
难度级别：中...
Swift - encode URL
...
Swift 3:
let originalString = "http://www.ihtc.cc?name=htc&title=iOS开发工程师"
1. encodingQuery:
let escapedString = originalString.addingPercentEncoding(withAllowedCharacters:NSCharacterSet.urlQueryAllowed)
result:
"http://www.ihtc.cc?name=htc&title=iOS%E5%BC%80%E5%8F%91%E5%B...