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Scala: List[Future] to Future[List] disregarding failed futures
I'm looking for a way to convert an arbitrary length list of Futures to a Future of List. I'm using Playframework, so ultimately, what I really want is a Future[Result] , but to make things simpler, let's just say Future[List[Int]] The normal way to do this would be to use Future.sequence(...) ...
Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C
... printf ("\r\n");
}
printf ("\r\nNumber of 32-byte chunks to convert: %d\r\n",(unsigned int)ceil(NUM_DATA_BYTES/32.0));
double start_time = omp_get_wtime();
bitflipbyte(data,(unsigned int)ceil(NUM_DATA_BYTES/32.0),k1);
double end_time = omp_get_wtime();
printf ("\r\nD...
Determine a string's encoding in C#
...ou are reading the contents of a file, which is made of bytes, and wish to convert that to a string, then the file's encoding must be used.
.NET includes encoding and decoding classes for: ASCII, UTF7, UTF8, UTF32 and more.
Most of these encodings contain certain byte-order marks that can be used ...
Covariance and contravariance real world example
...) // "Melman"
};
PrintLifeForms(myGiraffes); // Compile Error!
cannot convert from 'System.Collections.Generic.List<Giraffe>' to 'System.Collections.Generic.IList<LifeForm>'
Why? Because the generic parameter IList<LifeForm> is not covariant -
IList<T> is invariant, s...
GUI not working after rewriting to MVC
...plicity.
A more common approach uses an EventListenerList, as shown in the Converter application and suggested by the large number of EventListener subinterfaces and implementing classes.
A third option is to use a PropertyChangeListener, as shown here and here.
Addendum: Some common questions abo...
How do I resize an image using PIL and maintain its aspect ratio?
...
Better convert them to integer
– Black Thunder
Nov 10 '19 at 19:20
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Benchmarking small code samples in C#, can this implementation be improved?
...T doesn't improve it's results over time (like the Java one does). It only converts a method from IL to Assembly once, on the first call.
– Matt Warren
Sep 20 '14 at 21:58
add...
adding noise to a signal in python
...et SNR
# Set a target SNR
target_snr_db = 20
# Calculate signal power and convert to dB
sig_avg_watts = np.mean(x_watts)
sig_avg_db = 10 * np.log10(sig_avg_watts)
# Calculate noise according to [2] then convert to watts
noise_avg_db = sig_avg_db - target_snr_db
noise_avg_watts = 10 ** (noise_avg_d...
How to create a numpy array of all True or all False?
...ata itself when possible? I can't imagine numpy doing any heavy lifting to convert int 1 to bool True.
– BallpointBen
May 8 '18 at 19:02
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Mapping enum to string in hibernate
... You can even go further and, now as JPA 2.1 is released, use @Converter(autoApply = true) public class CategoryTypeConverter implements javax.persistence.AttributeConverter <CategoryType, String>
– membersound
Apr 14 '14 at 12:48
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