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What is the combinatory logic equivalent of intuitionistic type theory?
I recently completed a university course which featured Haskell and Agda (a dependent typed functional programming language), and was wondering if it was possible to replace lambda calculus in these with combinatory logic. With Haskell this seems possible using the S and K combinators, thus making i...
Rails DB Migration - How To Drop a Table?
I added a table that I thought I was going to need, but now no longer plan on using it. How should I remove that table?
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Ruby on Rails: How do I add a not null constraint to an existing column using a migration?
In my Rails (3.2) app, I have a bunch of tables in my database but I forgot to add a few not null constraints. I've googled around but I can't find how to write a migration which adds not null to an existing column.
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How to set a default value for a datetime column to record creation time in a migration?
Consider the table creation script below:
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Min/Max of dates in an array?
How can I find out the min and the max date from an array of dates? Currently, I am creating an array like this:
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Generate MD5 hash string with T-SQL
Is there a way to generate MD5 Hash string of type varchar(32) without using fn_varbintohexstr
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What's the difference between and
I've seen the wildcard used before to mean any object - but recently saw a use of:
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Multiple line code example in Javadoc comment
I have a small code example I want to include in the Javadoc comment for a method.
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What does Expression.Quote() do that Expression.Constant() can’t already do?
Note: I am aware of the earlier question “What is the purpose of LINQ's Expression.Quote method?” , but if you read on you will see that it doesn’t answer my question.
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AsyncTask and error handling on Android
I'm converting my code from using Handler to AsyncTask . The latter is great at what it does - asynchronous updates and handling of results in the main UI thread. What's unclear to me is how to handle exceptions if something goes haywire in AsyncTask#doInBackground .
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