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Redis key naming conventions?
...lient tool) also treats colon ':' as separator, and displays multiple keys grouped together
– Adam Rotaru
Oct 17 '16 at 9:36
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LINQ Aggregate algorithm explained
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Aggregate is basically used to Group or Sum up data.
According to MSDN
"Aggregate Function Applies an accumulator function over a sequence."
Example 1: Add all the numbers in a array.
int[] numbers = new int[] { 1,2,3,4,5 };
int aggregatedVal...
When should I use a composite index?
...able in a query, must use a single index for all where-clause, table join, group-by and order-by. So a separate index on each column may not work always but a composite index can do the magic.
– AKHIL MATHEW
Jul 25 at 13:39
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What is the most accurate way to retrieve a user's correct IP address in PHP?
...nymous proxy servers is just something I'll have to deal with for a select group of individuals.
– Corey Ballou
Oct 28 '09 at 10:04
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ES6 class variable alternatives
...hat to make an ES6 class that stylistically still makes sense but does not group the typical actions taking place in the constructor with all the property declarations we're doing. We simply use the actual JS constructor as the "declaration area", then make a class named function that we otherwise t...
Which is more efficient: Multiple MySQL tables or one large table?
...mance (depending on the use case ofcourse), semantics (some data is better grouped in a different table) and development. For instance I'm developing a custom ERP-system right now on top of a legacy system. I had to expand the old database tables with extra columns. I decided to make new tables for ...
How is AngularJS different from jQuery
...nly know one js library and that is jQuery .
But my other coders in the group are changing AngularJS as their default library in new project.
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Why are quaternions used for rotations?
... and mine is equivalent to another single rotation (since rotations form a group). In general, you need to be able to represent any such rotation.
It turns out that you can do this with just a vector. (That's the axis-angle representation of rotations.) But combining rotations in the axis-angle ...
Do DOM tree elements with ids become global variables?
...Hello Internet!';
</script>
<!-- Looking at you W3 HTML5 spec group ಠ_ಠ -->
</body>
</html>
http://jsbin.com/mahobinopa/edit?html,output
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Prepend a level to a pandas MultiIndex
I have a DataFrame with a MultiIndex created after some grouping:
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