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How to check if a variable is not null?
... is that you should check for null like:
if(myvar) { }
It also mentions what's considered 'falsey' that you might not realise.
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Escape quote in web.config connection string
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@Sebastian P.R. Gingter - people here cannot guess at what you have tried and what you know. You need to include such details in your question (as you now have).
– Oded
Jul 5 '10 at 8:10
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Difference between thread's context class loader and normal classloader
What is the difference between a thread's context class loader and a normal class loader?
4 Answers
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UnicodeDecodeError when redirecting to file
...this is the reason for Python's universal newline file reading mode).
Now, what I have called "character" above is what Unicode calls a "user-perceived character". A single user-perceived character can sometimes be represented in Unicode by combining character parts (base character, accents,…) fou...
Mocking member variables of a class using Mockito
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What is @Resource?
– IgorGanapolsky
Apr 24 '17 at 19:26
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Should I avoid the use of set(Preferred|Maximum|Minimum)Size methods in Java Swing?
...een defined for a reason. So when should I use them? In which context? For what purposes?
I don't know, personally I think of it as an API design accident. Slightly forced by compound components having special ideas about child sizes. "Slightly", because they should have implemented their needs wi...
Image Segmentation using Mean Shift explained
...tual numbers, we will display a color coding, so it's easier to understand what is happening:
The color coding for your matrix is:
Then we take a reasonable Mean Shift:
MeanShiftFilter[a, 3, 3]
And we get:
Where all center elements are equal (to 97, BTW).
You may iterate several...
Is there a Mutex in Java?
.../index-140767.html
It has a slightly different pattern which is (I think) what you are looking for:
try {
mutex.acquire();
try {
// do something
} finally {
mutex.release();
}
} catch(InterruptedException ie) {
// ...
}
In this usage, you're only calling release() after a succe...
How to get first element in a list of tuples?
...you mean something like this?
new_list = [ seq[0] for seq in yourlist ]
What you actually have is a list of tuple objects, not a list of sets (as your original question implied). If it is actually a list of sets, then there is no first element because sets have no order.
Here I've created a fla...
How to overcome root domain CNAME restrictions?
... you read the RFC carefully, however, you'll find that this is not exactly what it says. In fact, RFC 1912 states:
Don't go overboard with CNAMEs. Use them when renaming hosts, but plan to get rid of them (and inform your users).
Some DNS hosts provide a way to get CNAME-like functionality at ...