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What is the colon operator in Ruby?
When I say { :bla => 1, :bloop => 2 } , what exactly does the : do? I read somewhere about how it's similar to a string, but somehow a symbol.
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How to unmount a busy device
I've got some samba drives that are being accessed by multiple users daily. I already have code to recognize shared drives (from a SQL table) and mount them in a special directory where all users can access them.
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Custom bullet symbol for elements in that is a regular character, and not an image
I realize one can specify a custom graphic to be a replacement bullet character, using CSS attribute:
15 Answers
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Is it possible to override the configuration of a plugin already defined for a profile in a parent P
In a POM parent file of my project, I have such a profile defining some configurations useful for this project (so that I can't get rid of this parent POM) :
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How to export query result to csv in Oracle SQL Developer?
I'm using Oracle SQL Developer 3.0. Trying to figure out how to export a query result to a text file (preferably CSV). Right clicking on the query results window doesn't give me any export options.
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Detecting an “invalid date” Date instance in JavaScript
I'd like to tell the difference between valid and invalid date objects in JS, but couldn't figure out how:
46 Answers
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JPA or JDBC, how are they different?
I am learning Java EE and I downloaded the eclipse with glassfish for the same. I saw some examples and also read the Oracle docs to know all about Java EE 5. Connecting to a database was very simple. I opened a dynamic web project, created a session EJB , I used EntityManager and with the get meth...
Would it be beneficial to begin using instancetype instead of id?
Clang adds a keyword instancetype that, as far as I can see, replaces id as a return type in -alloc and init .
4 An...
How to check if a file exists in a folder?
I need to check if an xml file exists in the folder.
9 Answers
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Programmatically open Maps app in iOS 6
Previous to iOS 6, opening a URL like this would open the (Google) Maps app:
12 Answers
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