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How do you return a JSON object from a Java Servlet
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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 iterate a loop with index and element in Swift
...arrays.
In this array I wanted to filter odd or even indexed elements and convert them from Ints to Doubles. So enumerate() gets you index and the element, then filter checks the index, and finally to get rid of the resulting tuple I map it to just the element.
let evens = arrayOfValues.enumerate(...
Python try…except comma vs 'as' in except
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If you want to support all python versions you can use the sys.exc_info() function like this:
try:
a = 1/'0'
except (ZeroDivisionError, TypeError):
e = sys.exc_info()[1]
print(e.args[0])
(source:http://python3porting.com/noconv.html)
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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 '...
Java Round up Any Number
...way to do this is just:
You will receive a float or double and want it to convert it to the closest round up then just do System.out.println((int)Math.ceil(yourfloat));
it'll work perfectly
share
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How to print (using cout) a number in binary form?
...llowing a college course about operating systems and we're learning how to convert from binary to hexadecimal, decimal to hexadecimal, etc. and today we just learned how signed/unsigned numbers are stored in memory using the two's complement (~number + 1).
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How to get terminal's Character Encoding
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This is what worked for me on a CentOS system. It showed the system encoding based upon current language settings. The terminal settings used to get to that machine are a different story and a function of the client being used.
– Phil DD
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EF Code First: How do I see 'EntityValidationErrors' property from the nuget package console?
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I converted Richards answer to an extension method :
public static int SaveChangesWithErrors(this DbContext context)
{
try
{
return context.SaveChanges();
}
catch (DbEntityVali...
How large should my recv buffer be when calling recv in the socket library
... It doesn't really matter too much. If your protocol is a transactional / interactive one just pick a size that can hold the largest individual message / command you would reasonably expect (3000 is likely fine). If your protocol is transferring bulk data, then larger buffers can be more efficient...
Why does string::compare return an int?
... Similarly, if I write a < 0, the comparison is done
on the value of a, converted to an int. In practice, there
are very few cases where this makes a difference, at least on
2's complements machines where integer arithmetic wraps (i.e.
all but a very few exotics, today—I think the Unisys
mainf...