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Rails: Adding an index after adding column
Suppose I created a table table in a Rails app. Some time later, I add a column running:
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Ioc/DI - Why do I have to reference all layers/assemblies in application's entry point?
(Related to this question, EF4: Why does proxy creation have to be enabled when lazy loading is enabled? ).
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How to check if a map contains a key in Go?
I know I can iterate over a map m by,
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How to filter None's out of List[Option]?
If I have a List[Option[A]] in Scala, what is the idiomatic way to filter out the None values?
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Rendering JSON in controller
I was reading a book and in a chapter about Controllers when it talks about rendering stuff, for JSON it has an example like this but doesn't go in to details so I couldn't figure out the bigger picture that this example fits in:
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HTML Submit-button: Different value / button-text?
I'd like to create an HTML form submit button with the value 'add tag' , however, the web page is in Swedish, so I'd like to have a different button text .
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Test for equality among all elements of a single vector
I'm trying to test whether all elements of a vector are equal to one another. The solutions I have come up with seem somewhat roundabout, both involving checking length() .
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How to set a binding in Code?
I have the need to set a binding in code.
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ASP.NET Temporary files cleanup
Can I safely delete the contents of this folder
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How to check if a variable exists in a FreeMarker template?
I have a Freemarker template which contains a bunch of placeholders for which values are supplied when the template is processed. I want to conditionally include part of the template if the userName variable is supplied, something like:
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