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Input placeholders for Internet Explorer
...s, one I saw was jQuery-html5-placeholder.
I tried the demo out with IE9, and it looks like it wraps your <input> with a span and overlays a label with the placeholder text.
<label>Text:
<span style="position: relative;">
<input id="placeholder1314588474481" name="text" ...
What is causing ERROR: there is no unique constraint matching given keys for referenced table?
...R: there is no unique constraint matching given keys for referenced table, and having stared at it for while now I can't figure out why this error arises in this situation.
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git remote prune – didn't show as many pruned branches as I expected
...l branches (not tracking branches) are not touched by git remote prune command and should be removed manually.
Now, a real-world example for better understanding:
You have a remote repository with 2 branches: master and feature. Let's assume that you are working on both branches, so as a result yo...
What are transparent comparators?
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What problem does this solve,
See Dietmar's answer and remyabel's answer.
and does this change how standard containers work?
No, not by default.
The new member function template overloads of find etc. allow you to use a type that is comparable with the container's key,...
How to make an Android device vibrate?
I wrote an Android application. Now, I want to make the device vibrate when a certain action occurs. How can I do this?
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How do I programmatically determine operating system in Java?
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I'm using Windows 10 and yet os.name gives me Windows 8.1. Why is that? Where is this coming from?
– Brian
Feb 7 '16 at 19:59
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How do I check if a type provides a parameterless constructor?
...ou can check if you have a value type using the Type.IsValueType property, and create instances using Activator.CreateInstance(Type);
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View git history for folder
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And deletions of directories under path/to/folder ? will they show up?
– Zarathustra
Jul 22 '16 at 12:19
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What is __main__.py?
...hat is the __main__.py file for, what sort of code should I put into it, and when should I have one?
5 Answers
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Picking a random element from a set
How do I pick a random element from a set?
I'm particularly interested in picking a random element from a
HashSet or a LinkedHashSet, in Java.
Solutions for other languages are also welcome.
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