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Retrieve column names from java.sql.ResultSet
...ame = rsmd.getColumnName(1);
and you can get the column name from there. If you do
select x as y from table
then rsmd.getColumnLabel() will get you the retrieved label name too.
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Java 8 functional interface with no arguments and no return value
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If I understand correctly you want a functional interface with a method void m(). In which case you can simply use a Runnable.
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Getting a list item by index
...nces to objects. Clearing the list does not affect the objects held in it. If there are no other references to those objects, they will be garbage collected at some point in time.
– Mitch Wheat
Mar 4 at 1:17
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How do I change the UUID of a virtual disk?
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It would be nice if the VirtualBox UI gave the option to generate a new UUID when you tried to open a disk that's already known. Honestly I don't really use the disk manager for anything, I'd rather VirtualBox just treat virtual disks as file...
How to call methods dynamically based on their name? [duplicate]
...just use public_send:
method_name = 'foobar'
obj.public_send(method_name) if obj.respond_to? method_name
If the method is private/protected, use send instead, but prefer public_send.
This is a potential security risk if the value of method_name comes from the user. To prevent vulnerabilities, yo...
What is the difference between max-device-width and max-width for mobile web?
...eed to develop some html pages for iphone/android phones, but what is the difference between max-device-width and max-width ? I need to use different css for different screen size.
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How to verify a user's password in Devise
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Use Devise Methods
Devise provides you with built-in methods to verify a user's password:
user = User.find_for_authentication(email: params[:user][:email])
user.valid_password?(params[:user][:password])
For Rails 4+ with Strong Params, you can do something like this:
def login
user ...
Constructor function vs Factory functions
Can someone clarify the difference between a constructor function and a factory function in Javascript.
7 Answers
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PHP equivalent of .NET/Java's toString()
... @Supuhstar Ah right, I finally understand where you're coming from. Sorry if I was being obtuse before. I agree that this is a relevant detail and it would be valuable to add it, perhaps separating the answer into 'Converting Primitives' and 'Converting Objects' sections with headers.
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Tar a directory, but don't store full absolute paths in the archive
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how about if you also want to select the files to backup based on a wildcard? -C /var/www/site1 *.dat doesn't work :(
– Andy Lorenz
Nov 5 '14 at 10:30
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