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INNER JOIN vs LEFT JOIN performance in SQL Server
I've created SQL command that uses INNER JOIN on 9 tables, anyway this command takes a very long time (more than five minutes). So my folk suggested me to change INNER JOIN to LEFT JOIN because the performance of LEFT JOIN is better, despite what I know. After I changed it, the speed of query got si...
Maintain the aspect ratio of a div with CSS
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tinyxml XML解析库下载（tinyxml2.h 和 tinyxml2.cpp） - 源码下载 - 清泛...
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tinyxml2.h
/*
Original code by Lee Thomason (www.grinninglizard.com)
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any
damages arising from the use of this software.
Permission is granted to anyone to us...
Passing Data between View Controllers
...oller:viewControllerB animated:YES];
References
Using Delegation to Communicate With Other View Controllers in the View Controller Programming Guide
Delegate Pattern
NSNotification center
It's another way to pass data.
// add observer in controller(s) where you want to receive data
[[NSNo...
What's the fastest way to merge/join data.frames in R?
...low we illustrate these points.
Its worthwhile to notice that the precise computation can make a huge difference on which package is fastest. For example, we do a merge and an aggregate below. We see that the results are nearly reversed for the two. In the first example from fastest to slowest w...
How can I get a count of the total number of digits in a number?
...you could try:
Math.Ceiling(Math.Log10(n));
Correction following ysap's comment:
Math.Floor(Math.Log10(n) + 1);
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What is the simplest and most robust way to get the user's current location on Android?
...work.
One more approach is to use LocationClient http://developer.android.com/training/location/retrieve-current.html. But it requires Google Play Services apk to be installed on user device.
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JavaScript hashmap equivalent
... of the object, e.g., a key, or a set of keys, which are already unique, a combination of keys, which are unique together, or as complex as using some cryptographic hashes like in DojoX encoding, or DojoX UUID. While the latter solutions may produce unique keys, personally I try to avoid them at all...
What part of Hindley-Milner do you not understand?
... by adding parentheses everywhere, e.g. (Γ,(x:τ))⊢(x:σ), see overleaf.com/read/ddmnkzjtnqbd#/61990222
– SnowOnion
May 14 '18 at 14:02
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Good way of getting the user's location in Android
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