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Why Collections.sort uses merge sort instead of quicksort?
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Rails “validates_uniqueness_of” Case Sensitivity
Here is the model (I am using SQLLite3):
4 Answers
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Difference between Document-based and Key/Value-based databases?
I know there are three different, popular types of non-sql databases.
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Best way to use html5 data attributes with rails content_tag helper?
The issue, of course, is that ruby symbols don't like hyphens. So something like this obviously won't work:
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Xcode 4 and Core Data: How to enable SQL Debugging
I'm working on a universal iOS app and I'd like to see the raw SQL in the logs when I'm debugging. There is some info in this blog post about how to enable raw SQL logging for iOS Core Data development. The given example is for Xcode 3 and it's just not clear to me how to enable this in Xcode 4.
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In Eclipse, can I have multiple Console views at once, each showing a different Console?
I'm working on some applications that, in debug mode, log to the console. I'd like to run and debug them from inside of Eclipse, and view the console for each one simultaneously. However, I have a single Console tab that shows a single Console output at a time. Is there a way I can split the console...
Search for “does-not-contain” on a DataFrame in pandas
I've done some searching and can't figure out how to filter a dataframe by df["col"].str.contains(word) , however I'm wondering if there is a way to do the reverse: filter a dataframe by that set's compliment. eg: to the effect of !(df["col"].str.contains(word)) .
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How to convert a boolean array to an int array
I use Scilab, and want to convert an array of booleans into an array of integers:
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error: writable atomic property cannot pair a synthesized setter/getter with a user defined setter/g
I recently tried to compile an older Xcode project (which used to compile just fine), and now I'm seeing a lot of errors of this form:
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What is the difference between `raise “foo”` and `raise Exception.new(“foo”)`?
What is the difference - technical, philosophical, conceptual, or otherwise - between
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