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What to add for the update portion in ConcurrentDictionary AddOrUpdate
...ure of the AddOrUpdate() displayed in Visual Studio you can only guess the meaning of the 2 parameters. However in the specific case, that @user438331 asks about, I think the solution in my answer using a simple indexer is better.
– Niklas Peter
Sep 26 '15 at 1...
Working with Enums in android
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Sorry, I didn't mean that negatively. Just the weirdest syntax I've ever seen for an Enum
– Spidy
Feb 12 '12 at 7:15
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PHP: How to handle
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Your answer is the one that explains the LIBXML_NOCDATA meaning, thanks!
– Marcio Mazzucato
Jun 8 '17 at 15:38
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javascript: Clear all timeouts?
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They are not in the window object, but they have ids, which (afaik) are consecutive integers.
So you may clear all timeouts like so:
var id = window.setTimeout(function() {}, 0);
while (id--) {
window.clearTimeout(id); // will do nothing if no timeout with id is pres...
How to handle static content in Spring MVC?
.../from>
<to>/$1</to>
</outbound-rule>
This means that any uri with a '.' in it (like style.css for example) won't be re-written.
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How do I convert a Ruby class name to a underscore-delimited symbol?
...> "Foo bar"
So you should use one of those if they match your desired meaning, which is likely the case. Advantages:
easier to understand your code
your app will still work even in the (unlikely) event that Rails decides to change a naming convention.
BTW, human has the advantage of being I...
unique object identifier in javascript
I need to do some experiment and I need to know some kind of unique identifier for objects in javascript, so I can see if they are the same. I don't want to use equality operators, I need something like the id() function in python.
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How can I do an UPDATE statement with JOIN in SQL Server?
...f your SQL DBMS doesn't support MERGE):
ANSI/ISO:
update ud
set assid = (
select sale.assid
from sale
where sale.udid = ud.id
)
where exists (
select *
from sale
where sale.udid = ud.id
);
MySQL:
update ud u
inner join sale s on
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Re-entrant locks in C#
...d you can acquire locks on the root of that object graph, then do so. This means you have one lock on that root object and therefore don't have to worry so much about the sequence in which you acquire/release locks.
(One further note, your example isn't technically recursive. For it to be recursiv...
How default .equals and .hashCode will work for my classes?
...'t provide your own implementation, those will be used. For equals(), this means an == comparison: the objects will only be equal if they are exactly the same object. For hashCode(), the Javadoc has a good explanation.
For more information, see Effective Java, Chapter 3 (pdf), item 8.
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