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Mongodb Explain for Aggregation framework
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Starting with MongoDB version 3.0, simply changing the order from
collection.aggregate(...).explain()
to
collection.explain().aggregate(...)
will give you the desired results (documentation here).
For older versions >= 2.6, you will need to use th...
Get selected subcommand with argparse
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edited Jun 6 '14 at 14:01
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Why do I have to access template base class members through the this pointer?
...if
static const int x = 2;
template <typename T> void foo() { A *x = 0; }
if A is a type, that declares a pointer (with no effect other than to shadow the global x). If A is an object, that's multiplication (and barring some operator overloading it's illegal, assigning to an rvalue). If it i...
Do browsers send “\r\n” or “\n” or does it depend on the browser?
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50
The HTTP and MIME specs specify that header lines must end with \r\n, but they aren't clear (som...
How to create an array of 20 random bytes?
How can I create an array of 20 random bytes in Java?
6 Answers
6
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textarea's rows, and cols attribute in CSS
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107
width and height are used when going the css route.
<!DOCTYPE html>
<html>
<...
TypeScript or JavaScript type casting
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301
You can cast like this:
return this.createMarkerStyle(<MarkerSymbolInfo> symbolInfo);
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How to implement WiX installer upgrade?
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In the newest versions (from the 3.5.1315.0 beta), you can use the MajorUpgrade element instead of using your own.
For example, we use this code to do automatic upgrades. It prevents downgrades, giving a localised error message, and also prevents upgrading an alread...
Using async-await on .net 4
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106
Microsoft released the Async Targeting Pack (Microsoft.Bcl.Async) through Nuget as a replacemen...
iPhone: How to switch tabs with an animation?
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Update 04/2016: Justed wanted to update this to say thank you to everyone for all the votes. Please also note that this was originally written way back when ... before ARC, before constraints, before ... a lot of stuff! So please ta...