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IN vs OR in the SQL WHERE Clause
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I assume you want to know the performance difference between the following:
WHERE foo IN ('a', 'b', 'c')
WHERE foo = 'a' OR foo = 'b' OR foo = 'c'
According to the manual for MySQL if the values are constant IN sorts the list and then uses a binary search. I would imagine that OR evaluates t...
How do I view all commits for a specific day?
... by it and posted this follow-up question: stackoverflow.com/questions/59691065/…
– bgoodr
Jan 11 at 2:07
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Why doesn't Objective-C support private methods?
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Private methods could not bypass the message dispatch. Consider the following scenario:
A class AllPublic has a public instance method doSomething
Another class HasPrivate has a private instance method also called doSomething
You create an array containing any number of instances of both AllPubl...
How do you rename a MongoDB database?
...that no, the --db (-d) argument is itself also deprecated. There's been a bit of a deprecation party going on, it seems, given copyDatabase is also gone. I've poked SERVER-701 with my notes.
– amcgregor
Sep 5 '19 at 18:28
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How can you find the height of text on an HTML canvas?
...example of this working, I used this technique in the Carota editor.
Following on from ellisbben's answer, here is an enhanced version to get the ascent and descent from the baseline, i.e. same as tmAscent and tmDescent returned by Win32's GetTextMetric API. This is needed if you want to do a word-...
The Definitive C++ Book Guide and List
...dard (INCITS/ISO/IEC 14882:2011/2014/2017) This, of course, is the final arbiter of all that is or isn't C++. Be aware, however, that it is intended purely as a reference for experienced users willing to devote considerable time and effort to its understanding. The C++17 standard is released in elec...
How to stage only part of a new file with git?
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++1! due credit. I do trust a bit too much that I know these manpages by now .... </shame>
– sehe
Jun 22 '11 at 13:20
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Wait until file is unlocked in .NET
...t, and the wait time between retries.
NOTE: Unfortunately, the underlying Win32 error (ERROR_SHARING_VIOLATION) is not exposed with .NET, so I have added a small hack function (IsSharingViolation) based on reflection mechanisms to check this.
/// <summary>
/// Wraps sharing violation...
TextView.setTextSize behaves abnormally - How to set text size of textview dynamically for different
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Adding some extra flavor for this answer, as also ran into a bit of confusion. You should be able to drop this test into any @RunWith(AndroidJUnit4.class) test you have in your project (you'll also need to add the dimens to your dimens.xml).
Note: All these tests pass
@Test public vo...
C++ equivalent of java's instanceof
...ur class hierarchy, then this approach can boost your application a little bit with respect to its performance, if you often end up with checking the instance of a pointer. But use it with caution. There is no warranty for the correctness of this approach.
Note: All demos were compiled using clang ...