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How to trigger event when a variable's value is changed?
...an asynchronous process so technically the if statement could be ignored before the value has changed.
6 Answers
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Gson custom seralizer for one variable (of many) in an object using TypeAdapter
...ception {
JsonElement tree = delegate.toJsonTree(value);
beforeWrite(value, tree);
elementAdapter.write(out, tree);
}
@Override public C read(JsonReader in) throws IOException {
JsonElement tree = elementAdapter.read(in);
afterRead(tree);
r...
Maven project.build.directory
... well but it doesn't show you the default value of project.build.directory for example. That's what I wanted to show.
– maba
Nov 13 '12 at 8:59
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C# version of java's synchronized keyword?
...read-safety when you know you actually are going to use it (and test it).
For the method-level stuff, there is [MethodImpl]:
[MethodImpl(MethodImplOptions.Synchronized)]
public void SomeMethod() {/* code */}
This can also be used on accessors (properties and events):
private int i;
public int S...
Unique combination of all elements from two (or more) vectors
...
you can use order function for sorting any number of columns. for your example
df <- expand.grid(a,b)
> df
Var1 Var2
1 ABC 2012-05-01
2 DEF 2012-05-01
3 GHI 2012-05-01
4 ABC 2012-05-02
5 DEF 2012-05-02
6 GHI 2012-05-02
7 ...
Backing beans (@ManagedBean) or CDI Beans (@Named)?
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CDI is preferred over plain JSF because CDI allows for JavaEE-wide dependency injection. You can also inject POJOs and let them be managed. With JSF you can only inject a subset of what you can with CDI.
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What's the longest possible worldwide phone number I should consider in SQL varchar(length) for phon
...possible worldwide phone number I should consider in SQL varchar(length) for phone.
5 Answers
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What is the difference between NaN and None?
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NaN is used as a placeholder for missing data consistently in pandas, consistency is good. I usually read/translate NaN as "missing". Also see the 'working with missing data' section in the docs.
Wes writes in the docs 'choice of NA-representation':
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The difference between try/catch/throw and try/catch(e)/throw e
... trace will contain info back to the Save method (that might be sufficient for you to solve the problem), but you still have access to the original exception if you need it.
As a final remark, when you are expecting an exception, you should really catch that one specific exception, and not a genera...
What is the difference between save and export in Docker?
I am playing around with Docker for a couple of days and I already made some images (which was really fun!). Now I want to persist my work and came to the save and export commands, but I don't fully understand them.
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