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What does $$ mean in the shell?
I once read that one way to obtain a unique filename in a shell for temp files was to use a double dollar sign ( $$ ). This does produce a number that varies from time to time... but if you call it repeatedly, it returns the same number. (The solution is to just use the time.)
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Print “hello world” every X seconds
Lately I've been using loops with large numbers to print out Hello World :
14 Answers
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Android preferences onclick event
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android:action="android.intent.action.VIEW"
android:data="http://www.example.com"
/>
</PreferenceScreen>
to launch a specific activity:
<PreferenceScreen android:title="something">
<intent
android:action="android.intent.action.MAIN"
a...
Running a specific test case in Django when your app has a tests directory
The Django documentation ( http://docs.djangoproject.com/en/1.3/topics/testing/#running-tests ) says that you can run individual test cases by specifying them:
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How to prevent blank xmlns attributes in output from .NET's XmlDocument?
...like this
C# code:
XmlElement bookElement = xdoc.CreateElement("trkpt", "http://www.topografix.com/GPX/1/1");
bookElement.SetAttribute("lat", "30.53597");
bookElement.SetAttribute("lon", "97.753324");
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Selectors in Objective-C?
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As per apple docs:
https://developer.apple.com/library/archive/documentation/General/Conceptual/DevPedia-CocoaCore/Selector.html
A selector is the name used to select a method to execute for an object, or the unique identifier that replaces...
How to show android checkbox at right side?
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<?xml version="1.0" encoding="utf-8"?>
<CheckBox xmlns:android="http://schemas.android.com/apk/res/android"
android:text="hello"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:button="@null"
android:drawableRight="?android:attr/listCh...
How can I replace text with CSS?
...th a red button that says 'goodbye', using CSS.
Before:
After:
See http://jsfiddle.net/ZBj2m/274/ for a live demo:
Here's our green button:
<button>Hello</button>
button {
background-color: green;
color: black;
padding: 5px;
}
Now let's hide the original element, but a...
Bash Script : what does #!/bin/bash mean? [duplicate]
In bash script, what does #!/bin/bash at the 1st line mean ?
3 Answers
3
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SQL “between” not inclusive
I have a query like this:
8 Answers
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