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What is the purpose of the reader monad?
...a -> Reader env a
Okay, so Haskell and other functional languages are based on the lambda calculus. Lambda calculus has a syntax that looks like
data Term = Apply Term Term | Lambda String Term | Var Term deriving (Show)
and we want to write an evaluator for this language. To do so, we wil...
How do I pass command-line arguments to a WinForms application?
...th the use of an enum to solidify the use of the array througout your code base.
"And you can use this anywhere in your application, you aren’t just
restricted to using it in the main() method like in a console
application."
Found at:HERE
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Match multiple cases classes in scala
...ypes and not the values nor which type was presented, the disjunctive type-based match is meaningful and available.
– Randall Schulz
Jun 4 '11 at 14:01
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Cause of a process being a deadlock victim
...minutes. I am currently not using NOLOCK as a hint to the MS SQL database engine. At the same time we have another process doing updates and inserts into the same database and same tables. The first process has started, recently to end prematurely with a message
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git cherry-pick not working
...ry-picking hasn't already been merged somehow, as either a proper merge, rebase/cherry-pick, or piecemeal patch. (Use git show <commit-id> to see the diff.)
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Draw radius around a point in Google map
...rdinate of this imaginery square (the GLatLngBounds) bounding this circle, based on the desired radius. The math is quite complicated, but you can just refer to getDestLatLng function in the blog. The rest should be pretty straightforward.
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Set cURL to use local virtual hosts
Using Apache or Ngnix I always create development sites based on real projects such as http://project1.loc which, after adding to my .hosts file, the browser has no problem using.
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How to git-svn clone the last n revisions from a Subversion repository?
...ample: git svn clone -s -r1450:HEAD some/svn/repo
Git's data structure is based on pointers in a directed acyclic graph (DAG), which makes it trivial to walk back n commits. But in SVN ( and therefore in Git-SVN) you will have to find the revision number yourself.
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How does Stack Overflow generate its SEO-friendly URLs?
...ff’s the logic for this is easy to follow.
His approach is purely lookup based and missed a lot of characters I found in examples while researching on Stack Overflow. To counter this, I first peform a normalisation pass (AKA collation mentioned in Meta Stack Overflow question Non US-ASCII charact...
How to create a multi-tenant database with shared table structures?
... Thousands? Tens
of thousands? More? The larger you
expect your tenant base to be, the
more likely you will want to consider
a more shared approach.
How much storage space do you expect the average tenant's data to occupy?
If you expect some or all tenants to
store very large amounts o...