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May
12 |
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comment |
A case class as a "wrapper" class for a collection. What about map/foldLeft/ What's your Scala version? 2.10.1 for me. |
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May
12 |
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answered | A case class as a "wrapper" class for a collection. What about map/foldLeft/ |
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May
6 |
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awarded | Enthusiast |
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May
2 |
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comment |
Best way to make a shell script daemon? start-stop-daemon was surprisingly convenient to use |
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Apr
28 |
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comment |
Where is "?" placeholder of sql in play2's anorm type less and read less |
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Apr
27 |
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answered | Generics and parameterized types in Java |
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Apr
23 |
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comment |
Rigid type error combined with IO and polymorphic types If googling for that error doesn't help, try opening a new question and show in more detail where the error occurs. |
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Apr
22 |
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Rigid type error combined with IO and polymorphic types The question was phrased in a way that led me to believe you aimed to write an interpreter with debugging functionality as a feature, as opposed to needing to simply quickly debug your code. For the latter, Debug.Trace is fine, but for the former it's very questionable IMHO. |
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Apr
22 |
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Rigid type error combined with IO and polymorphic types Debug.Trace wraps that, though it may be instructive to implement trace yourself too.
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Apr
22 |
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comment |
Rigid type error combined with IO and polymorphic types I probably shouldn't be telling you this, but for quick and dirty temporary debugging print statements, it's possible to use System.IO.Unsafe, which allows you to "escape" the IO monad. I certainly wouldn't leave it in the final product though. It's generally considered very bad practice. Also, it's cheating :) |
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Apr
21 |
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Rigid type error combined with IO and polymorphic types I recommend abstracting over the monad m (instead of an opaque o), and using the do syntax as shown in the answer.
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Apr
20 |
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Rigid type error combined with IO and polymorphic types Monadic I/O indeed tends to be "contagious". |
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Apr
20 |
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answered | Rigid type error combined with IO and polymorphic types |
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Apr
13 |
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comment |
Do anti-ship drones sometimes intercept enemy energy shot weapons? It's easy to miss but it clearly happens every now and again. |
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Apr
13 |
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awarded | Supporter |
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Apr
8 |
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answered | Creating the Singleton design pattern in PHP5 |
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Apr
8 |
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comment |
Creating the Singleton design pattern in PHP5 This does not work when there is more than one subclass! $instance resides in Singleton, not the subclass. After some subclass is instantiated, getInstance() will return that instance for all subclasses.
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Mar
17 |
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comment |
How would i generate a random and unique string in Ruby? There is also the potential (if improbable) race condition of two requests trying to add the same name at the same time. The database should have a unique constraint on that column and you should be prepared to catch ActiveRecord::RecordNotUnique.
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Mar
6 |
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awarded | Critic |
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Mar
6 |
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answered | Where do these methods belong to? |
