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Understanding typedefs for function pointers in C
I have always been a bit stumped when I read other peoples' code which had typedefs for pointers to functions with arguments. I recall that it took me a while to get around to such a definition while trying to understand a numerical algorithm written in C a while ago. So, could you share your tips a...
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo
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It is a problem of your Intent.
Please add your Activity in your AndroidManifest.xml.
When you want to make a new activity, you should register it in your AndroidManifest.xml.
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Is there any way to enforce typing on NSArray, NSMutableArray, etc.?
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You could make a category with an -addSomeClass: method to allow compile-time static type checking (so the compiler could let you know if you try to add an object it knows is a different class through that method), but there's no real way to enforce th...
How to perform .Max() on a property of all objects in a collection and return the object with maximu
... this in MoreLINQ. You can look at the implementation there, but basically it's a case of iterating through the data, remembering the maximum element we've seen so far and the maximum value it produced under the projection.
In your case you'd do something like:
var item = items.MaxBy(x => x.Hei...
Inner join vs Where
...RCHAR(20)
);
The execution plan for the query using the inner join:
-- with inner join
EXPLAIN PLAN FOR
SELECT * FROM table1 t1
INNER JOIN table2 t2 ON t1.id = t2.id;
SELECT *
FROM TABLE (DBMS_XPLAN.DISPLAY);
-- 0 select statement
-- 1 hash join (access("T1"."ID"="T2"."ID"))
-- 2 table access ...
Why aren't superclass __init__ methods automatically invoked?
Why did the Python designers decide that subclasses' __init__() methods don't automatically call the __init__() methods of their superclasses, as in some other languages? Is the Pythonic and recommended idiom really like the following?
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Why array implements IList?
See the definition of System.Array class
7 Answers
7
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Benefit of using Parcelable instead of serializing object
...le and Parcelable belongs to the way Android performs serialization in. It is used for example in passing data between activities. But I wonder, if there are any benefits in using Parcelable instead of classic serialization in case of saving state of my business objects to the internal memory f...
How to execute file I'm editing in Vi(m)
How to execute file that I'm editing in Vi(m) and get output in split window (like in SciTE)?
13 Answers
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Method chaining - why is it a good practice, or not?
Method chaining is the practice of object methods returning the object itself in order for the result to be called for another method. Like this:
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