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How do I get the size of a java.sql.ResultSet?
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Do a SELECT COUNT(*) FROM ... query instead.
OR
int size =0;
if (rs != null)
{
rs.last(); // moves cursor to the last row
size = rs.getRow(); // get row id
}
In either of the case, you won't have to loop over the entire data.
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How to make an HTTP POST web request
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request.Method = "POST";
// Create POST data and convert it to a byte array.
string postData = "This is a test that posts this string to a Web server.";
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
// Set the ContentType property ...
Clang optimization levels
...m-as < /dev/null | opt -O3 -disable-output -debug-pass=Arguments
As pointed out in Geoff Nixon's answer (+1), clang additionally runs some higher level optimizations, which we can retrieve with:
echo 'int;' | clang -xc -O3 - -o /dev/null -\#\#\#
Documentation of individual passes is availabl...
Why can't variable names start with numbers?
...a string of digits would be a valid identifier as well as a valid number.
int 17 = 497;
int 42 = 6 * 9;
String 1111 = "Totally text";
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Is it OK to use == on enums in Java?
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Thanks! I guess if I had just thought to step into .equals() with the compiler I would have seen this...
– Kip
Feb 10 '09 at 21:44
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Do try/catch blocks hurt performance when exceptions are not thrown?
...Stopwatch w = new Stopwatch();
double d = 0;
w.Start();
for (int i = 0; i < 10000000; i++)
{
try
{
d = Math.Sin(1);
}
catch (Exception ex)
{
Console.WriteLine(ex.ToString());
}
}
w.Stop();
Conso...
iPhone Data Usage Tracking/Monitoring
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The thing is that pdp_ip0 is one of interfaces, all pdpXXX are WWAN interfaces dedicated to different functions, voicemail, general networking interface.
I read in Apple forum that :
The OS does not keep network statistics on a process-by-process basis. As suc...
How can I use speech recognition without the annoying dialog in android phones
...nizer is ready to begin listening for speech and as it receives speech and converts it to text.
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Does Java support default parameter values?
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@JarrodRoberson: Interesting way of forcing correct use via the compiler, thanks for sharing! Friendly suggestion for future posts: 300 lines of uncommented source code is probably a bit much to digest for most people (code is harder to read ...
How do I send a POST request with PHP?
...portant, the CURLOPT_POSTFIELDS parameter data actually doesn't need to be converted to a string ("urlified"). Quote: "This parameter can either be passed as a urlencoded string like 'para1=val1&para2=val2&...' or as an array with the field name as key and field data as value. If value is an...