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What does the “Just” syntax mean in Haskell?
...rs, it means that a value of the type must have been constructed with just one of the possible constructors. For this type, a value was either constructed via Just or Nothing, there are no other (non-error) possibilities.
Since Nothing has no parameter type, when it's used as a constructor it names...
Row count with PDO
... this would mean doing an extra database query. I assume he has already done a select query and now wants to know how many rows were returned.
– nickf
May 19 '09 at 15:17
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What HTTP status response code should I use if the request is missing a required parameter?
...tains well-formed (i.e., syntactically correct), but
semantically erroneous, XML instructions.
They state that malformed xml is an example of bad syntax (calling for a 400). A malformed query string seems analogous to this, so 400 doesn't seem appropriate for a well-formed query-string which...
Causes of getting a java.lang.VerifyError
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One thing to add, sometimes it's the IDE's fault, or the device that the bytecode isn't right. Try restarting the IDE to get it to recognize the sync issue. Failing that delete and re-install the app. Rebooting the device may...
Update my github repo which is forked out from another project [duplicate]
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In your local clone of Child, pull from Parent, adding it as a remote if you like:
cd child
git remote add parent <parent-url>
git pull parent
The url of the parent could be the public github repo, or your local clone of it - the lo...
How do I revert my changes to a git submodule?
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I tried all methods above until I got to this one. For me, this is the only one that got my git looking "clean" (without the * in my PS1 that git status -uno was unable to explain).
– Guy Rapaport
Mar 11 at 23:47
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Is it possible to have a multi-line comments in R? [duplicate]
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You can, if you want, use standalone strings for multi-line comments — I've always thought that prettier than if (FALSE) { } blocks. The string will get evaluated and then discarded, so as long as it's not the last line in a function nothing will happen.
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Measuring code execution time
...ilable nuget.org/packages/LogExec). This does the exact same things that @soner-gonul mentioned - but, the usage is clutter free and hides all the boilerplate code. Very helpful when you want to use it very frequently. It also uses Common.Logging so that you can integrate with your preferred logging...
Why not inherit from List?
...l in the blank:
A football team is a particular kind of _____
Did anyone say "list of football players with a few bells and whistles", or did they all say "sports team" or "club" or "organization"? Your notion that a football team is a particular kind of list of players is in your human mind ...
How to escape braces (curly brackets) in a format string in .NET
...fying the FormatProvider twice, with the risk that you'd specify different ones, or miss one.
– ClickRick
Apr 20 '15 at 9:02
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