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Avoiding instanceof in Java
...ng a chain of "instanceof" operations is considered a "code smell". The standard answer is "use polymorphism". How would I do it in this case?
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How do I rename a column in a database table using SQL?
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On PostgreSQL (and many other RDBMS), you can do it with regular ALTER TABLE statement:
=> SELECT * FROM Test1;
id | foo | bar
----+-----+-----
2 | 1 | 2
=> ALTER TABLE Test1 RENAME COLUMN foo TO baz;
ALTER TABLE
=> SELE...
using href links inside tag
...gt;Sitemap</option>
</select>
UPDATE (Nov 2015): In this day and age if you want to have a drop menu there are plenty of arguably better ways to implement one. This answer is a direct answer to a direct question, but I don't advocate this method for public facing web sites.
UPDATE (Ma...
HSL to RGB color conversion
...(which he attributes to a now defunct mjijackson.com, but is archived here and the original author has a gist - thanks to user2441511).
The code is re-posted below:
HSL to RGB:
/**
* Converts an HSL color value to RGB. Conversion formula
* adapted from http://en.wikipedia.org/wiki/HSL_color_sp...
How can I write to the console in PHP?
... Firefox you can use an extension called FirePHP which enables the logging and dumping of information from your PHP applications to the console. This is an addon to the awesome web development extension Firebug.
http://www.studytrails.com/blog/using-firephp-in-firefox-to-debug-php/
Chrome
Howev...
Array.Copy vs Buffer.BlockCopy
Array.Copy and Buffer.BlockCopy both do the same thing, but BlockCopy is aimed at fast byte-level primitive array copying, whereas Copy is the general-purpose implementation. My question is - under what circumstances should you use BlockCopy ? Should you use it at any time when you are copyi...
Using union and order by clause in mysql
...all
select 3 as Rank, id, add_date from Table where distance between 5 and 15
) a
order by rank, id, add_date desc
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Difference between numeric, float and decimal in SQL Server
What are the differences between numeric , float and decimal datatypes and which should be used in which situations?
8...
How do we count rows using older versions of Hibernate (~2009)?
... answered Sep 3 '09 at 10:34
SalandurSalandur
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How do I set the version information for an existing .exe, .dll?
...e of the binaries already have version information (added at compile time) and some do not.
14 Answers
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