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Is it safe to get values from a java.util.HashMap from multiple threads (no modification)?
...ting thread makes the reference to the map visible to other threads.
Basically, the only possible race here is between the construction of the HashMap and any reading threads that may access it before it is fully constructed. Most of the discussion is about what happens to the state of the map obje...
ListView item background via custom selector
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I've been frustrated by this myself and finally solved it. As Romain Guy hinted to, there's another state, "android:state_selected", that you must use. Use a state drawable for the background of your list item, and use a different state drawable for listSelector of yo...
How to revert a merge commit that's already pushed to remote branch?
...se a merge commit has more than one parent, and Git does not know automatically which parent was the mainline, and which parent was the branch you want to un-merge.
When you view a merge commit in the output of git log, you will see its parents listed on the line that begins with Merge:
commit 8f9...
CSS vertical alignment text inside li
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line-height is how you vertically align text. It is pretty standard and I don't consider it a "hack". Just add line-height: 100px to your ul.catBlock li and it will be fine.
In this case you may have to add it to ul.catBlock li a instead since all of th...
Abstract Class vs Interface in C++ [duplicate]
...rt interfaces (the "mature approach") instead of C++ classes (this is basically what COM does, but without the burden of COM infrastructure).
I'd use an interface if I want to define a set of rules using which a component can be programmed, without specifying a concrete particular behavior. Classes...
Why does Boolean.ToString output “True” and not “true”
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Only people from Microsoft can really answer that question. However, I'd like to offer some fun facts about it ;)
First, this is what it says in MSDN about the Boolean.ToString() method:
Return Value
Type: System.String
TrueString if the value...
Go > operators
... 2, 5 times" or 32. And 32 >> 5 is "32 divided by 2, 5 times" or 1.
All the other answers give the more technical definition, but nobody laid it out really bluntly and I thought you might want that.
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HTML form readonly SELECT tag/input
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We could also use this
Disable all except the selected option:
<select>
<option disabled>1</option>
<option selected>2</option>
<option disabled>3</option>
</select>
This way the dropdown still...
jQuery checkbox event handling
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Just a small tip. You will get a performance boost by using input:checkbox in your selector instead of just :checkbox since the latter is translated to the universal selector *:checkbox.
– jimmystormig
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Best way to get identity of inserted row?
...last identity value generated for any table in the current session, across all scopes. You need to be careful here, since it's across scopes. You could get a value from a trigger, instead of your current statement.
SCOPE_IDENTITY() returns the last identity value generated for any table in the cur...