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What's the point of map in Haskell, when there is fmap?
...or a map function? Couldn't it just be what is currently known as fmap and fmap could be removed from the language?
3...
The purpose of Model View Projection Matrix
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The model, view and projection matrices are three separate matrices. Model maps from an object's local coordinate space into world space, view from world space to camera space, projection from camera to screen.
If you compose all three, you...
Nokogiri installation fails -libxml2 is missing
...is present, however, it doesn't differentiate between "libxml2 is missing" and "a compiler to test libxml2 is missing".
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Xcode build failure “Undefined symbols for architecture x86_64”
... click on the plus button.
-Find the IOBluetooth.framework from the list and hit Add.
This will make sure that the IOBluetooth.framework definitions are found by the linker. You can see that the framework is a member of your target by clicking on the framework in the left pane and seeing the...
How to access session variables from any class in ASP.NET?
...access session variables from any page or control using Session["loginId"] and from any class (e.g. from inside a class library), using System.Web.HttpContext.Current.Session["loginId"].
But please read on for my original answer...
I always use a wrapper class around the ASP.NET session to simpl...
How to delete files/subfolders in a specific directory at the command prompt in Windows
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You can use this shell script to clean up the folder and files within C:\Temp source:
del /q "C:\Temp\*"
FOR /D %%p IN ("C:\Temp\*.*") DO rmdir "%%p" /s /q
Create a batch file (say, delete.bat) containing the above command. Go to the location where the delete.bat file is loc...
Android Location Providers - GPS or Network Provider?
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There are 3 location providers in Android.
They are:
gps –> (GPS, AGPS): Name of the GPS location provider. This
provider determines location using satellites. Depending on
conditions, this provider may take a while to return a location fi...
How to prevent favicon.ico requests?
...in a Web page is a good thing (normally).
However it is not always desired and sometime developers need a way to avoid the extra payload. For example an IFRAME would request a favicon without showing it.
Worst yet, in Chrome and Android an IFRAME will generate 3 requests for favicons:
"GET /favicon....
What is a higher kinded type in Scala?
...of polymorphism/abstraction. It means the same thing for polymorphic types and values. Concretely, a higher-order abstraction abstracts over something that abstracts over something. For types, the term "higher-kinded" is a special-purpose version of the more general "higher-order".
Thus, the higher-...
How should I edit an Entity Framework connection string?
... than delete it), saved the app.config changes, right-clicked the designer and chose Update Model From Database. The wizard then let me include the sensitive info (uid & pwd) in the connection string. Thanks!
– DeveloperDan
Mar 14 '11 at 15:41
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