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Objective-C: difference between id and void *
...ning about unknown methods. It will, of course, raise an exception at run time unless obj is nil or really does implement that method.
Often you should use NSObject* or id<NSObject> in preference to id, which at least confirms that the object returned is a Cocoa object, so you can safely use...
How to convert an Int to a String of a given length with leading zeros to align?
How can I convert an Int to a 7-character long String , so that 123 is turned into "0000123" ?
7 Answers
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What is the difference between IQueryable and IEnumerable?
... to a query expression representing the IQueryable<T> object as a runtime-traversable abstract syntax tree that can be understood by the given query provider (for the most part, you can't give a LINQ to SQL expression to a LINQ to Entities provider without an exception being thrown).
The expr...
How does lucene index documents?
...t to understand though, that Lucene index is append only. In some point in time application decide to commit (publish) all the changes in the index. Lucene finish all service operations with index and close it, so it's available for searching. After commit index basically immutable. This index (or i...
How to create a numpy array of all True or all False?
In Python, how do I create a numpy array of arbitrary shape filled with all True or all False?
7 Answers
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How to “inverse match” with regex?
I'm using RegexBuddy but I'm in trouble anyway with this thing :\
9 Answers
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Java: Multiple class declarations in one file
...n?
If you instead tell javac to compile Foo.java and Bar.java at the same time, or even if you had previously compiled Bar.java (leaving the Baz.class where javac can find it) then this error goes away. This makes your build process feel very unreliable and flaky, however.
Because the actual limit...
Difference between MEAN.js and MEAN.io
...y concerning. They re-engineered the code and directory structure multiple times, and merging the new changes is too time consuming.
The nice things about both mean.io and mean.js code is that they come with Bootstrap integration. They also come with Facebook, Github, Linkedin etc authentication th...
How do C++ class members get initialized if I don't do it explicitly?
Suppose I have a class with private memebers ptr , name , pname , rname , crname and age . What happens if I don't initialize them myself? Here is an example:
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Installing multiple instances of the same windows service on a server
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This does indeed allow a service to be installed multiple times. However, all the information provided by the service installer. F.e. description, logon type etc. is ignored
– Noel Widmer
Aug 5 '16 at 11:43
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