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How can I truncate a double to only two decimal places in Java?
... to the Ones place:
simply cast to int
To the Tenths place:
multiply by ten
cast to int
cast back to double
and divide by ten.
Hundreths place
multiply and divide by 100 etc.
Example:
static double truncateTo( double unroundedNumber, int decimalPlaces ){
int truncatedNumberInt = (in...
Configure Microsoft.AspNet.Identity to allow email address as username
...
You can allow this by plugging in your own UserValidator on the UserManager, or just by turning it off on the default implementation:
UserManager.UserValidator = new UserValidator<TUser>(UserManager) { AllowOnlyAlphanumericUserNames = fa...
Copying text to the clipboard using Java
...t.putHtml("<b>Some</b> text");
//this will be replaced by previous putString
content.putString("Some different text");
//set the content to clipboard
clipboard.setContent(content);
// validate before retrieving it
if(clipboard.hasContent(Dat...
How do I analyze a .hprof file?
...round, look at the Memory Analyzer project at Eclipse, contributed to them by SAP.
Some of what you can do is mind-blowingly good for finding memory leaks etc -- including running a form of limited SQL (OQL) against the in-memory objects, i.e.
SELECT toString(firstName) FROM com.yourcompany.som...
Properly removing an Integer from a List
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By using casting, you ensure the compiler sees the type you expect. In the first case '(int) n' can only be of type int in the second case '(Integer) n' can only be of type Integer. 'n' will be converted/boxed/unboxed as req...
Creating C macro with ## and __LINE__ (token concatenation with positioning macro)
...tions of the UNIQUE macro on the same line. Note: __COUNTER__ is supported by MS Visual Studio, GCC (since V4.3), and Clang, but is not standard C.
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Can I incorporate both SignalR and a RESTful API?
... ASP.NET Web API, forward the video to time 33:35.
– bytefire
Aug 29 '13 at 9:32
The video doesn't load over HTTPS, if...
What is the minimum length of a valid international phone number?
...n Solution): Actually, Instead of validating an international phone number by having different checks like length etc, you can use the Google's libphonenumber library. It can validate a phone number in E164 format directly. It will take into account everything and you don't even need to give the cou...
How to read file contents into a variable in a batch file?
...FromInput with a stack allocated buffer to read 1023 wide characters (2046 bytes). It reads 1023 bytes from the file, assuming 1 byte per OEM/ANSI character, but it decodes the file using the current codepage, which isn't necessarily OEM/ANSI. Worst case is codepage 65001 and a file filled with 4-by...
Static fields on a null reference in Java
... static methods or variable referred object name is automatically replaced by class name.
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