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Multidimensional Array [][] vs [,] [duplicate]
...ow and column, which gets you down to a single double:
double[,] ServicePoint = new double[10,9];
ServicePoint[0]... // <-- meaningless, a 2d array can't use just one index.
UPDATE:
To clarify based on your question, the reason your #1 had a syntax error is because you had this:
double[][] ...
What is the most efficient way to store a list in the Django models?
...
A simple way to store a list in Django is to just convert it into a JSON string, and then save that as Text in the model. You can then retrieve the list by converting the (JSON) string back into a python list. Here's how:
The "list" would be stored in your Django model like...
How to manage startActivityForResult on Android?
...l the SecondActivity using startActivityForResult() method
For example:
int LAUNCH_SECOND_ACTIVITY = 1
Intent i = new Intent(this, SecondActivity.class);
startActivityForResult(i, LAUNCH_SECOND_ACTIVITY);
In your SecondActivity set the data which you want to return back to FirstActivity. If you...
String.Replace ignoring case
...csharp", RegexOptions.IgnoreCase);
Console.WriteLine(result); // prints "hello csharp"
}
}
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StringIO in Python3
... StringIO module. For a more direct solution the message TypeError: Can't convert 'bytes' object to str implicitly, see this answer.
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Func vs. Action vs. Predicate [duplicate]
...eginInvoke.
Predicate is just a special cased Func<T, bool> really, introduced before all of the Func and most of the Action delegates came along. I suspect that if we'd already had Func and Action in their various guises, Predicate wouldn't have been introduced... although it does impart a c...
C# catch a stack overflow exception
...wn exception when it falls below a threshold:-
class Program
{
static int n;
static int topOfStack;
const int stackSize = 1000000; // Default?
// The func is 76 bytes, but we need space to unwind the exception.
const int spaceRequired = 18*1024;
unsafe static void Main(st...
C++ where to initialize static const
...here.
static const char* cs; // Same with C strings.
static const int i = 3; // Integral types can be initialized here (*)...
static const int j; // ... OR in cpp.
};
foo.cpp
#include "foo.h"
const string foo::s = "foo string";
const char* foo::cs = "foo C string";
// No definiti...
Evaluating string “3*(4+2)” yield int 18 [duplicate]
...t that page wandering if there was a framework function instead and got an interesting answer about using DataTable's Compute method: stackoverflow.com/questions/2859111/c-math-calculator/…
– Michael
Sep 28 '11 at 2:44
...
Download a file with Android, and showing the progress in a ProgressDialog
...ile you want to download");
mProgressDialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
downloadTask.cancel(true); //cancel the task
}
});
The AsyncTask will look like this:
// usually, subclasses of A...