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PostgreSQL Crosstab Query
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Install the additional module tablefunc once per database, which provides the function crosstab(). Since Postgres 9.1 you can use CREATE EXTENSION for that:
CREATE EXTENSION IF NOT EXISTS tablefunc;
Improved test case
CREATE ...
Why are #ifndef and #define used in C++ header files?
... This will prevent from again declaring the identifiers, enums, structure, etc...
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How to scroll to the bottom of a UITableView on the iPhone before the view appears
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I believe that calling
tableView.setContentOffset(CGPoint(x: 0, y: CGFloat.greatestFiniteMagnitude), animated: false)
will do what you want.
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What is this weird colon-member (“ : ”) syntax in the constructor?
...tion about it in any good C++ book.
You should, in most cases, initialize all member objects in the member initialization list (however, do note the exceptions listed at the end of the FAQ entry).
The takeaway point from the FAQ entry is that,
All other things being equal, your code will run...
SQL update query using joins
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I usually start with semicolon to terminate previous statement (if any). CTE rocks ! Simple to design complicated query / joined updates. I use it all the time...
– Adam W
Dec 17 '15 at 5:19
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How can I get the MD5 fingerprint from Java's keytool, not only SHA-1?
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With JDK 1.7 installed, keytool always outputs by default SHA1 fingerprint, not MD5.
you can get the MD5 Certificate by adding -v option.
use the following code:-
C:\Program Files\Java\jdk1.7.0\bin>keytool -v -list -alias
androiddebugke...
How to execute a Python script from the Django shell?
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I ended up doing sys.path.append(os.getcwd()), it works when I am inside my project directory, my DJANGO_SETTINGS_MODULE is correct and I try to run a script that import models, views, etc.
– Danilo Cabello
Jul 11 '14 at 16...
How do I use vim registers?
...on Windows (or from "mouse highlight" clipboard on Linux)
"*p
To access all currently defined registers type
:reg
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Apache not starting on MAMP Pro
...ectly. Make sure the ports are Apache defaults, NOT MAMP defaults (port 80 etc). If it works straight away, this should not apply to you.
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What is the correct way to create a single-instance WPF application?
...t the blog hasn't been updated in a while. That makes me worry that eventually it might disappear, and with it, the advocated solution. I'm reproducing the content of the article here for posterity. The words belong solely to the blog owner at Sanity Free Coding.
Today I wanted to refactor so...