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What does Expression.Quote() do that Expression.Constant() can’t already do?
...n by dismissing the uninteresting case. If we wish it to return a delegate then the question of whether to use Quote or Constant is a moot point:
var ps = Expression.Parameter(typeof(int), "s");
var pt = Expression.Parameter(typeof(int), "t");
var ex1 = Expression.Lambda(
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How to do INSERT into a table records extracted from another table
...trying to write a query that extracts and transforms data from a table and then insert those data into another table. Yes, this is a data warehousing query and I'm doing it in MS Access. So basically I want some query like this:
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Volatile vs Static in Java
...sing the same object and updating a variable which is declared as static then it means t1 and t2 can make their own local copy of the same object(including static variables) in their respective cache, so update made by t1 to the static variable in its local cache wont reflect in the static vari...
Using isKindOfClass with Swift
...View
}
Of course, if you also need to assign the view to a new constant, then the if let ... as? ... syntax is your boy, as Kevin mentioned. But if you don't need the value and only need to check the type, then you should use the is operator.
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How to check what version of jQuery is loaded?
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// If there is concern that there may be multiple implementations of `$` then:
jQuery.fn.jquery
Recently I have had issues using $.fn.jquery on a few sites so I wanted to note a third simple command to pull the jQuery version. $_ should return a string containing the version number.
If you ...
RabbitMQ / AMQP: single queue, multiple consumers for same message?
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If same user login from multiple devices then message get only one device.How can be solved it or any idea please?
– Rafiq
Nov 21 '17 at 7:32
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Checking if output of a command contains a certain string in a shell script
...f grep:
./somecommand | grep 'string' &> /dev/null
if [ $? == 0 ]; then
echo "matched"
fi
which is done idiomatically like so:
if ./somecommand | grep -q 'string'; then
echo "matched"
fi
and also:
./somecommand | grep -q 'string' && echo 'matched'
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How do I perform the SQL Join equivalent in MongoDB?
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@clayton : How about more then two collections?
– Dipen Dedania
Jan 8 '16 at 10:36
1
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The tilde operator in C
...eader is doing it, but it's touchy. I read that if you have X and NOT it, then subtract one you'll get the unsigned version of a signed number, is that not correct?
– MarcusJ
Oct 21 '15 at 19:25
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Find all elements on a page whose element ID contains a certain text using jQuery
...find all elements on a page whose element ID contains a certain text. I'll then need to filter the found elements based on whether they are hidden or not. Any help is greatly appreciated.
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