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Git: what is a dangling commit/blob and where do they come from?
...X. Read the note after the diagram to understand this better.
Git automatically garbage collects (i.e disposes) dangling commits. We can use the git reflog to recover a branch (of dangling commits) which was deleted without merging it. We can recover deleted commits only if it is present in local o...
What is the difference between javac and the Eclipse compiler?
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Eclipse has implemented its own compiler called as Eclipse Compiler for Java (ECJ).
It is different from the javac, the compiler that is shipped with Sun JDK. One notable difference is that the Eclipse compiler lets you run code that didn't actually properly compil...
Is there documentation for the Rails column types?
...s, movies, and other files in their original, raw format in chunks of data called blobs
:primary_key
This datatype is a placeholder that Rails translates into whatever primary key datatype your database of choice requires (i.e. serial primary key in postgreSQL). Its use is somewhat complicated ...
What's the point of map in Haskell, when there is fmap?
...generalized to cover Functor in Haskell 1.3. I.e., in Haskell 1.3 fmap was called map. This change was then reverted in Haskell 1.4 and fmap was introduced. The reason for this change was pedagogical; when teaching Haskell to beginners the very general type of map made error messages more difficult ...
Method Overloading for null argument
...ut none is more specific than the other, so Java can't decide which one to call. In this case you'll have to explicitly mention which one you want to call by casting the argument to the appropriate type.
Note that in practice this problem occurs far more seldom than one might think. The reason for ...
How do I animate constraint changes?
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Two important notes:
You need to call layoutIfNeeded within the animation block. Apple actually recommends you call it once before the animation block to ensure that all pending layout operations have been completed
You need to call it specifically on the...
Accept function as parameter in PHP
...d to find some documentation to link to first, and didn't know what it was called exactly. Ah well, now I'll know for when I need to do this as well. Thanks.
– Rob
Apr 23 '10 at 17:01
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return statement vs exit() in main()
... has more implications for C++, but the differences are important.
When I call return in main(), destructors will be called for my locally scoped objects. If I call exit(), no destructor will be called for my locally scoped objects! Re-read that. exit() does not return. That means that once I call ...
Make a phone call programmatically
How can I make a phone call programmatically on iPhone? I tried the following code but nothing happened:
12 Answers
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Implementing MVC with Windows Forms
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This is an implementation of the MVP variant called PassiveView. In the passive view the view should not choice his presenter. For a similar example (but with a view REALLY passive) check this sample danieleteti.it/?p=221 (example in Delphi language)
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