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Should I use tag for icons instead of ? [closed]

...s HTML and Twitter Bootstrap HTML (before v3) both use the <i> tag to display icons. 7 Answers ...
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What is the difference between “Rollback…” and “Back Out Submitted Changelist #####” in Perforce P4V

I want to reverse the changes from one of my checkins. In the right-click context menu of the particular changelist, there are these two options: ...
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How do I call one constructor from another in Java?

Is it possible to call a constructor from another (within the same class, not from a subclass)? If yes how? And what could be the best way to call another constructor (if there are several ways to do it)? ...
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How to disable and re-enable console logging in Python?

I am using Python's logging module and I want to disable the console logging for some time but it doesn't work. 17 Answer...
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Why does range(start, end) not include end?

... Because it's more common to call range(0, 10) which returns [0,1,2,3,4,5,6,7,8,9] which contains 10 elements which equals len(range(0, 10)). Remember that programmers prefer 0-based indexing. Also, consider the following common code snippet: for i ...
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BackgroundWorker vs background Thread

... an infinite (while(true)) loop. In this loop I use WaitHandle.WaitAny to keep the thread snoozing until something of interest happens. One of the event handles I wait on is a " StopThread " event so that I can break out of the loop. This event is signaled when from my overridden Form.Dispose()...
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How to pass a variable from Activity to Fragment, and pass it back?

I am currently making an android app, and I want to pass a date between activity and fragment. My activity has a button, which opens the fragment: DatePickerFragment. ...
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What does an exclamation mark mean in the Swift language?

... What does it mean to "unwrap the instance"? Why is it necessary? As far as I can work out (this is very new to me, too)... The term "wrapped" implies we should think of an Optional variable as a present, wrapped in shiny paper, which might ...
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How to fix “Headers already sent” error in PHP

...ut Raw <html> sections prior <?php code. Why does it happen? To understand why headers must be sent before output it's necessary to look at a typical HTTP response. PHP scripts mainly generate HTML content, but also pass a set of HTTP/CGI headers to the webserver: HTTP/1.1 200 OK Powe...
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How to write a simple Html.DropDownListFor()?

In ASP.NET MVC 2, I'd like to write a very simple dropdown list which gives static options. For example I'd like to provide choices between "Red", "Blue", and "Green". ...