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Fast way to discover the row count of a table in PostgreSQL
...run ANALYZE enough. It is usually very close.
See the PostgreSQL Wiki FAQ.
Or the dedicated wiki page for count(*) performance.
Better yet
The article in the PostgreSQL Wiki is was a bit sloppy. It ignored the possibility that there can be multiple tables of the same name in one database - in diff...
How do I rotate the Android emulator display? [duplicate]
How can I rotate the Android emulator display to see it in landscape mode?
23 Answers
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Remove multiple whitespaces
...,$row['message']);
You are using \s\s+ which means whitespace(space, tab or newline) followed by one or more whitespace. Which effectively means replace two or more whitespace with a single space.
What you want is replace one or more whitespace with single whitespace, so you can use the pattern ...
Android: What is better - multiple activities or switching views manually?
I have developed some apps for Android, and this questions stays always:
7 Answers
7
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How can I convert spaces to tabs in Vim or Linux?
I've looked over several questions on Stack Overflow for how to convert spaces to tabs without finding what I need. There seem to be more questions about how to convert tabs to spaces, but I'm trying to do the opposite.
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Adjusting the Xcode iPhone simulator scale and size [duplicate]
Is there anyway to make the iOS simulator for iPhone 5 in Xcode, be the actual size of the iPhone 5. I'm getting a huge display and things seemed to be scaled.
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How to change default timezone for Active Record in Rails?
...this answer because all others seem to be incomplete.
config.active_record.default_timezone determines whether to use Time.local (if set to :local) or Time.utc (if set to :utc) when pulling dates and times from the database. The default is :utc.
http://guides.rubyonrails.org/configuring.html
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Why does C# not provide the C++ style 'friend' keyword? [closed]
The C++ friend keyword allows a class A to designate class B as its friend. This allows Class B to access the private / protected members of class A .
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What is an AngularJS directive?
...quite a lot of time reading through AngularJS documentation and several tutorials, and I have been quite surprised at how unapproachable the documentation is.
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WCF on IIS8; *.svc handler mapping doesn't work
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More specifically:
Run Server Manager (on task bar and start menu)
Choose the server to administer (probably local server)
Scroll down to "Roles and Features" section.
Choose "Add Role or Feature" from Tasks drop down
On "Ad...