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Easiest way to check for an index or a key in an array?
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How to unload a package without restarting R
I'd like to unload a package without having to restart R (mostly because restarting R as I try out different, conflicting packages is getting frustrating, but conceivably this could be used in a program to use one function and then another--although namespace referencing is probably a better idea fo...
Python Process Pool non-daemonic?
Would it be possible to create a python Pool that is non-daemonic? I want a pool to be able to call a function that has another pool inside.
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How to read a large file - line by line?
I want to iterate over each line of an entire file. One way to do this is by reading the entire file, saving it to a list, then going over the line of interest. This method uses a lot of memory, so I am looking for an alternative.
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Add directives from directive in AngularJS
I'm trying to build a directive that takes care of adding more directives to the element it is declared on.
For example, I want to build a directive that takes care of adding datepicker , datepicker-language and ng-required="true" .
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Hibernate: hbm2ddl.auto=update in production?
Is it okay to run Hibernate applications configured with hbm2ddl.auto=update to update the database schema in a production environment?
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Putting git hooks into repository
Is it considered to be a bad practice - to put .git/hooks into the projects repository (using symlinks, for example). If yes, what is the best way to deliver same hooks to different git users?
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Can regular expressions be used to match nested patterns? [duplicate]
Is it possible to write a regular expression that matches a nested pattern that occurs an unknown number of times? For example, can a regular expression match an opening and closing brace when there are an unknown number of open/close braces nested within the outer braces?
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Meaning of -
I am new to XML and I am trying to understand the basics. I read the line below in "Learning XML", but it is still not clear, for me. Can someone point me to a book or website which explains these basics clearly?
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MySQL, better to insert NULL or empty string?
I have a form on a website which has a lot of different fields. Some of the fields are optional while some are mandatory. In my DB I have a table which holds all these values, is it better practice to insert a NULL value or an empty string into the DB columns where the user didn't put any data?
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