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MySQL indexes - what are the best practices?
I've been using indexes on my MySQL databases for a while now but never properly learnt about them. Generally I put an index on any fields that I will be searching or selecting using a WHERE clause but sometimes it doesn't seem so black and white.
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What's the best way of structuring data on firebase?
I am new to firebase and I want to know what's the best way of structuring data on it.
3 Answers
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Intent - if activity is running, bring it to front, else start a new one (from notification)
... altogether, I suggest you post that as it's own question, I don't really know the answer unfortunately.
– Franco
Feb 5 at 1:30
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show 2 mor...
How to avoid having class data shared among instances?
...f.x
A change method sets self.temp
Pretty straight forward so far yeah? Now let's start playing around with this class. Let's initialize this class first:
a = A('Tesseract')
Now do the following:
>>> print(a.temp)
Skyharbor
>>> print(A.temp)
Skyharbor
Well, a.temp worked ...
Creating an Android trial application that expires after a fixed time period
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@AmirDe Hi Amir, could you let me know what isn't working for you? I'm happy to help, support@trialy.io Trialy is working great for 1000+ users
– Nick
Jun 6 '18 at 7:26
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The permissions granted to user ' are insufficient for performing this operation. (rsAccessDenied)"}
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I know it's for a long time ago but you (or any other new comers) can resolve this issue by
Add the [Domain\User] to Administrator, IISUser, SQLReportingUser groups
Delete Encryption Key in SSRS configuration tools
ReRun the D...
C++ performance vs. Java/C#
...to do all of its heap compression at once (a fairly expensive operation).
Now I can't speak for Java on this next point, but I know that C# for example will actually remove methods and method calls when it knows the body of the method is empty. And it will use this kind of logic throughout your cod...
Embedding JavaScript engine into .NET [closed]
...ventually decided to give control to the community. Consequently there is now a new release that includes many bug fixes. Unfortunately JavaScript callbacks from .Net are not yet supported.
– Oliver Bock
Feb 9 '12 at 23:43
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How to debug Lock wait timeout exceeded on MySQL?
...mpting to change at least one row in one or more InnoDB tables.
Since you know the query, all the tables being accessed are candidates for being the culprit.
From there, you should be able to run SHOW ENGINE INNODB STATUS\G
You should be able to see the affected table(s)
You get all kinds of additio...
How to show the “Are you sure you want to navigate away from this page?” when changes committed?
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Update (2017)
Modern browsers now consider displaying a custom message to be a security hazard and it has therefore been removed from all of them. Browsers now only display generic messages. Since we no longer have to worry about setting the message, it i...