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Calculating the difference between two Java date instances
...ong diffInMillies = date2.getTime() - date1.getTime();
return timeUnit.convert(diffInMillies,TimeUnit.MILLISECONDS);
}
And then can you call:
getDateDiff(date1,date2,TimeUnit.MINUTES);
to get the diff of the 2 dates in minutes unit.
TimeUnit is java.util.concurrent.TimeUnit, a standard Jav...
Using boolean values in C
... @rpattiso You're quite right, of course, but I guess I would read !!a as "convert non-boolean a to its equivalent truth value", whereas I'd read !a as "logically invert the boolean variable a". In particular, I'd look for some specific reason the logical inversion was desired.
...
Replace tabs with spaces in vim
I would like to convert tab to spaces in gVim. I added the following line to my _vimrc :
11 Answers
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Is Python interpreted, or compiled, or both?
...tion to native machine code. A compiler is, more generally, a program that converts a program in one programming language into a program in another programming language (arguably, you can even have a compiler with the same input and output language if significant transformations are applied). And JI...
How to make the division of 2 ints produce a float instead of another int?
...and n and d have opposite signs.
This is why 1/2 does not give a float.
Converting just either one to float as in (float)1/2 suffices because 15.17. Multiplicative Operators says:
Binary numeric promotion is performed on the operands
and 5.6.2. Binary Numeric Promotion says:
If eithe...
RGB to hex and hex to RGB
How to convert colors in RGB format to hex format and vice versa?
50 Answers
50
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What does .SD stand for in data.table in R
...
Edit:
Given how well-received this answer was, I've converted it into a package vignette now available here
Given how often this comes up, I think this warrants a bit more exposition, beyond the helpful answer given by Josh O'Brien above.
In addition to the Subset of the D...
How do you return a JSON object from a Java Servlet
...
First convert the JSON object to String. Then just write it out to the response writer along with content type of application/json and character encoding of UTF-8.
Here's an example assuming you're using Google Gson to convert a Ja...
How to get numbers after decimal point?
...0') % 1
Decimal('0.20')
As kindall notes in the comments, you'll have to convert native floats to strings first.
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How do I load a file from resource folder?
...ce returns a URL, not a file. The getFile method of java.net.URL does not convert a URL to a file; it just returns the path and query portions of the URL. You shouldn't even try to convert it to a File; just call openStream and read from that.
– VGR
Apr 7 '...