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How to fix: “No suitable driver found for jdbc:mysql://localhost/dbname” error when using pools? [du
...Text copied from this answer: stackoverflow.com/a/5484287/2479087 ; Never call DriverManager.registerDriver() method manually. The JDBC spec requires a driver to register itself when the class is loaded, and the class is loaded via Class.forName(). In JDBC 4 the drivers are able to be loaded automat...
argparse module How to add option without any argument?
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answered Mar 11 '11 at 10:25
jfsjfs
326k132132 gold badges817...
How to add leading zeros?
...matting you want to do.
The example from the question is quite easy since all the values have the same number of digits to begin with, so let's try a harder example of making powers of 10 width 8 too.
anim <- 25499:25504
x <- 10 ^ (0:5)
paste (and it's variant paste0) are often the first...
How can I change my Cygwin home folder after installation?
I just installed Cygwin, and it looks like the home directory in the bash prompt is on my Z: drive. That's not where I want it.
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How to search in array of object in mongodb
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answered Jun 11 at 9:44
Joby Wilson MathewsJoby Wilson Mathews
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Why does pattern matching in Scala not work with variables?
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edited Aug 16 '11 at 12:22
answered Aug 16 '11 at 12:16
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How to locate the vimrc file used by vim editor?
...C variable is useful, as is looking at output of :scripts for full list of all loaded script files, including all vimrc files.
– Herbert Sitz
Jan 23 '12 at 20:38
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Regular expression \p{L} and \p{N}
...This syntax is specific for modern Unicode regex implementation, which not all interpreters recognize. You can safely replace \p{L} by {a-zA-Z} (ascii notation) or {\w} (perl/vim notation); and \p{N} by {0-9} (ascii) or {\d} (perl/vim). If you want to match all of them, just do: {a-zA-Z0-9}+ or {\w\...
Rails: How to get the model class name based on the controller class name?
...ntroller
def index
# Equivalent of @house_buyers = HouseBuyer.find(:all)
objects = controller_name.classify.constantize.find(:all)
instance_variable_set("@#{controller_name}", objects)
end
end
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MAC addresses in JavaScript
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I concur with all the previous answers that it would be a privacy/security vulnerability if you would be able to do this directly from Javascript. There are two things I can think of:
Using Java (with a signed applet)
Using signed Javasc...