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When NOT to use Cassandra?
...itting solution for that problem.
I will try to answer your questions one by one in the same order you asked them. Since Cassandra is based on the NoSQL family of databases, it's important you understand why use a NoSQL database before I answer your questions.
Why use NoSQL
In the case of RDBMS, ...
Different types of thread-safe Sets in Java
... atomic.
Resizing is slow (as for HashMap/HashSet), thus try to avoid this by estimating the needed size on creation (and using about 1/3 more of that, as it resizes when 3/4 full).
Use this when you have large sets, a good (and fast) hash function and can estimate the set size and needed concurren...
Using jQuery to center a DIV on the screen
...eft : 0)+'px'});
});
}
});
})(jQuery);
Activated by this code :
$('#mainDiv').center();
PLUGIN VERSION
(function($){
$.fn.extend({
center: function (options) {
var options = $.extend({ // Default values
inside:window, // e...
What new capabilities do user-defined literals add to C++?
...
You could do the same thing by giving std::bitset a proper constexpr constructor.
– Nicol Bolas
Mar 9 '13 at 3:32
1
...
How to measure code coverage in Golang?
... The cover tool is part of the go.tools subrepository. It can be installed by running
$ go get golang.org/x/tools/cmd/cover
The cover tool does two things.
First, when "go test" is given the -cover flag, it is run automatically to rewrite the source for the package and insert instrum...
How to forward declare a template class in namespace std?
... even such a forward declaration in namespace std is explicitly prohibited by the standard: the only thing you're allowed to put in std is a template specialisation, commonly std::less on a user-defined type. Someone else can cite the relevant text if necessary.
Just #include <list> and don't...
CSS “and” and “or”
...
&& works by stringing-together multiple selectors like-so:
<div class="class1 class2"></div>
div.class1.class2
{
/* foo */
}
Another example:
<input type="radio" class="class1" />
input[type="radio"].class1
{...
Peak signal detection in realtime timeseries data
...und here. To use the demo, simply run it and create a time series yourself by clicking on the upper chart. The algorithm starts working after drawing lag number of observations.
Result
For the original question, this algorithm will give the following output when using the following settings: lag = ...
Why use the 'ref' keyword when passing an object?
...ing. You cannot change the value of a string once it has been created. But by using a ref, you could create a function that changes the string for another one that has a different value.
It is not a good idea to use ref unless it is needed. Using ref gives the method freedom to change the argument f...
EC2 instance types's exact network performance?
...
Bandwidth is tiered by instance size, here's a comprehensive answer:
For t2/m3/c3/c4/r3/i2/d2 instances:
t2.nano = ??? (Based on the scaling factors, I'd expect 20-30 MBit/s)
t2.micro = ~70 MBit/s (qiita says 63 MBit/s) - t1.micro gets about...