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Calculate distance between two latitude-longitude points? (Haversine formula)
...t;
/// Convert degrees to Radians
/// </summary>
/// <param name="x">Degrees</param>
/// <returns>The equivalent in radians</returns>
public static double Radians(double x)
{
return x * PIx / 180;
}
/// <summary>
/// Ca...
Query-string encoding of a Javascript Object
...oice. For GET requests, if you're sending anything other than a few simple parameters to the server then it's likely your design is wrong.
– Tim Down
Nov 11 '09 at 14:25
2
...
How to get the Full file path from URI
...turn uri.getPath();
}
return null;
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".eq...
What does ** (double star/asterisk) and * (star/asterisk) do for parameters?
In the following method definitions, what does the * and ** do for param2 ?
22 Answers
...
Why would adding a method add an ambiguous call, if it wouldn't be involved in the ambiguity
...ways, no promises.)
A correct analysis follows. The candidates are:
0: C(params string[]) in its normal form
1: C(params string[]) in its expanded form
2: C<string>(string)
3: C(string, object)
Candidate zero is obviously inapplicable because string is not convertible to string[]. That l...
Creating a system overlay window (always on top)
...se let me know.
OnCreate of your Service: I have used WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH flag. This is the only change in service.
@Override
public void onCreate() {
super.onCreate();
Toast.makeText(getBaseContext(),"onCreate", Toast.LENGTH_LONG).show();
...
How to read a text file reversely with iterator in C#
... /// the stream into text.
/// </summary>
/// <param name="streamSource">Data source</param>
public ReverseLineReader(Func<Stream> streamSource)
: this(streamSource, Encoding.UTF8)
{
}
/// <summary>
...
How can I check if a Perl array contains a particular value?
...
Simply turn the array into a hash:
my %params = map { $_ => 1 } @badparams;
if(exists($params{$someparam})) { ... }
You can also add more (unique) params to the list:
$params{$newparam} = 1;
And later get a list of (unique) params back:
@badparams = keys...
how to add records to has_many :through association in rails
...
I think you can simply do this:
@cust = Customer.new(params[:customer])
@cust.houses << House.find(params[:house_id])
Or when creating a new house for a customer:
@cust = Customer.new(params[:customer])
@cust.houses.create(params[:house])
You can also add via ids:...
How do I best silence a warning about unused variables?
...r sees it is used. This is portable between compilers.
E.g.
void foo(int param1, int param2)
{
(void)param2;
bar(param1);
}
Or,
#define UNUSED(expr) do { (void)(expr); } while (0)
...
void foo(int param1, int param2)
{
UNUSED(param2);
bar(param1);
}
...