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Reference alias (calculated in SELECT) in WHERE clause
...probably consider a computed column (and perhaps persisted) instead, especially if a lot of queries refer to this same expression.
PS your fears seem unfounded. In this simple example at least, SQL Server is smart enough to only perform the calculation once, even though you've referenced it twice. ...
Default initialization of std::array?
...rantee that the syntax std::array<T, N> x; will default-initialize all the elements of the array ?
5 Answers
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Count lines of code in all java classes in Android Studio
...
Go to
https://plugins.jetbrains.com/idea/plugin/4509-statistic
and install the latest version
To install
Run Android Studio
From the menu bar, select File-->Settings
Under IDE Settings, click Plugins, and then click Install plugin from disk
Navigate to the folder where you downloaded the p...
Why does sed not replace all occurrences?
...ontent-policy\"\u003e(content policy)\u003c/a\u003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true,enableSnippets:true
});
...
Warning as error - How to rid these
I cannot figure out how to get rid of errors that basically should not be halting my compile in Visual Studio 2010 and should not be show stoppers, or at least I will fix them later, but I don't want the compile to just error and halt on these kinds of problems.
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Jump to editor shortcut in Intellij IDEA
...o the editor.
Esc is not always going to put the focus on editor.
For those on Mac (you don't have a Home key), use Command + E to open the recent files then hit enter.
share
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improve this answe...
Why aren't superclass __init__ methods automatically invoked?
...thon designers decide that subclasses' __init__() methods don't automatically call the __init__() methods of their superclasses, as in some other languages? Is the Pythonic and recommended idiom really like the following?
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Select rows which are not present in other table
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There are basically 4 techniques for this task, all of them standard SQL.
NOT EXISTS
Often fastest in Postgres.
SELECT ip
FROM login_log l
WHERE NOT EXISTS (
SELECT -- SELECT list mostly irrelevant; can just be empty in Postgr...
How to list of all the tables defined for the database when using active record?
How do I get a list of all the tables defined for the database when using active record?
5 Answers
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How do I apply a style to all buttons of an Android application
...ontent-policy\"\u003e(content policy)\u003c/a\u003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true,enableSnippets:true
});
...