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Why use pointers? [closed]
...tionality, missing data types or for pure perfomance. More below...
When and where should I use pointers?
Short answer here is: Where you cannot use anything else. In C you don't have any support for complex datatypes such as a string. There are also no way of passing a variable "by reference" ...
#ifdef #ifndef in Java
... to 3 seconds. But when I defined the variables as static class variables (and not a function local variable) the running time returned to 1 second. Thanks for the help.
– jutky
Nov 28 '09 at 22:34
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Python - Create a list with initial capacity
...i]= message
return result
Results. (evaluate each function 144 times and average the duration)
simple append 0.0102
pre-allocate 0.0098
Conclusion. It barely matters.
Premature optimization is the root of all evil.
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Are there benefits of passing by pointer over passing by reference in C++?
...ary/promoted objects, nor the use of pointed object as stack-like objects. And it will suggest that the argument can be NULL when, most of the time, a NULL value should be forbidden. Read litb's answer for a complete answer.
– paercebal
Dec 3 '08 at 10:12
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Storing C++ template function definitions in a .CPP file
...n’t I separate the definition of my templates class from its declaration and put it inside a .cpp file?
How can I avoid linker errors with my template functions?
How does the C++ keyword export help with template linker errors?
They go into a lot of detail about these (and other) template issues...
How do I get the current GPS location programmatically in Android?
...xample source code is in Get Current Location coordinates , City name - in Android.
See how it works:
All we need to do is add this permission in the manifest file:
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
And create a LocationManager instance like this...
How to get current memory usage in android?
...048576 == 0x100000
It's quite obvious that the number is used to convert from bytes to mebibyte
P.S: we need to calculate total memory only once. so call point 1 only once in your code and then after, you can call code of point 2 repetitively.
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Camera orientation issue in Android
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There are quite a few similar topics and issues around here. Since you're not writing your own camera, I think it boils down to this:
some devices rotate the image before saving it, while others simply add the orientation tag in the photo's exif data.
I'd reco...
How to get HTTP response code for a URL in Java?
...getResponseCode();
This is by no means a robust example; you'll need to handle IOExceptions and whatnot. But it should get you started.
If you need something with more capability, check out HttpClient.
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Nullable ToString()
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Actually, at least two people noticed: Eric Lippert and Johannes Rössel.
– Jon Skeet
Mar 15 '10 at 17:22
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