Things I need to learn more about
Following on from a conversation I had yesterday, I realise there are some areas of .NET that I don't understand as well as I might:
- Passing by reference and by value
- The Garbage Collector
- Re-using ASP.NET user controls
You usually know what you know, but it is helpful to know what you don't know too.
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3 comments:
And write SQL statements with LEFT/RIGHT/INNER/OUTER JOINs by hand and have a fair idea of what to expect (instead of just relying on the tool to generate it for you)
Passing byref and byval is pretty easy to understand..
By reference is a pointer to a variable so mainly I would just use it (in a function context), when the function needs to alter the content of more than just one (object) variable.
Byval is the more common of the two, and creates a copy of the variable passed into the function, which can be modified independant of the original variable.
You'll find that ByRef is used more in Subs than functions.
Yeah.. I guess I mean understand at the CLR-level. I know the difference when I'm coding, but I was meaning I should also understand what is going on under the hood to achieve the functionality of ByVal and ByRef (eg. how it affects the stack and heap etc).
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