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Removing whitespace from strings in Java
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st.replaceAll("\\s+","") removes all whitespaces and non-visible characters (e.g., tab, \n).
st.replaceAll("\\s+","") and st.replaceAll("\\s","") produce the same result.
The second regex is 20% faster than the first one, but as the number consecutive spaces i...
horizontal scrollbar on top and bottom of table
...ummy element and the real element, to get the other element in synch when either scrollbar is moved. The dummy element will look like a second horizontal scrollbar above the real element.
For a live example, see this fiddle
Here's the code:
HTML:
<div class="wrapper1">
<div class="di...
Closing JDBC Connections in Pool
...a particular instance of Connection is freed up and can be reused? I am a little confused on this one, any pointers appreciated.
Yes, certainly you need to close the pooled connection as well. It's actually a wrapper around the actual connection. It wil under the covers release the actual connectio...
How to add Action Bar from support library into PreferenceActivity?
Action Bar compatibility has been added into support library, revision 18. It now has ActionBarActivity class for creating activities with Action Bar on older versions of Android.
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How to determine the Boost version on a system?
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If you want to figure it out manually (rather than in-code), the go to the include directory, and open up version.hpp. BOOST_VERSION takes a bit of deciphering, but BOOST_LIB_VERSION is pretty clear. The value of mine is currently "1_42"
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How to specify maven's distributionManagement organisation wide?
...nd 50+) maven2 projects, so that they can deploy into a central nexus repository. When using the mvn deploy goal, one does need to specify the target in the distributionManagement tag like this:
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UIButton: Making the hit area larger than the default hit area
I have a question dealing with UIButton and its hit area. I am using the Info Dark button in interface builder, but I am finding that the hit area is not large enough for some people's fingers.
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Quicksort: Choosing the pivot
...do is to choose a pivot. But when I look at pseudocode like the one below, it is not clear how I should choose the pivot. First element of list? Something else?
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make arrayList.toArray() return more specific types
...ly ArrayList.toArray() would return a type of Object[] ....but supposed it's an
Arraylist of object Custom , how do I make toArray() to return a type of Custom[] rather than Object[] ?
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Printing leading 0's in C?
...pcode. While the number would be stored as 1001, what is a good way to do it?
10 Answers
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