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What is the equivalent of MATLAB's repmat in NumPy
...n no longer assert that repmat and tile are equivalent instructions.
In order to get tile to behave like repmat, in Python one has to make sure that the input matrix has as many dimensions as the elements are in the sequence. This is done, for example, by a little preconditioning and creating a r...
Java ByteBuffer to String
...sibling getBytes() method:
byte[] bytes = k.getBytes( StandardCharsets.UTF_8 );
To put bytes with a particular encoding into a String, you can use a different String constructor:
String v = new String( bytes, StandardCharsets.UTF_8 );
Note that ByteBuffer.array() is an optional operation. If y...
How to start an Intent by passing some parameters to it?
...
In order to pass the parameters you create new intent and put a parameter map:
Intent myIntent = new Intent(this, NewActivityClassName.class);
myIntent.putExtra("firstKeyName","FirstKeyValue");
myIntent.putExtra("secondKeyName"...
Get nth character of a string in Swift programming language
...vailable also to the substrings:
extension StringProtocol {
subscript(_ offset: Int) -> Element { self[index(startIndex, offsetBy: offset)] }
subscript(_ range: Range<Int>) -> SubSequence { prefix(range.lowerBound+range.count).suffix(range.c...
Readonly Properties in Objective-C?
...
In the implementation .m file:
// inside one of my init methods
self->_foo = @"someString"; // Notice the underscore prefix of var name.
That’s it, that’s all you need. No muss, no fuss.
Details
As of Xcode 4.4 and LLVM Compiler 4.0 (New Features in Xcode 4.4), you need not mess with th...
how to deal with google map inside of a hidden div (Updated picture)
...
In order to keep the original center of the map right after resizing, consider extending the resize statement this way: var center = map.getCenter(); google.maps.event.trigger(map, 're...
What is the easiest way to remove the first character from a string?
... fastest and most readable way of doing things:
require 'benchmark'
N = 1_000_000
puts RUBY_VERSION
STR = "[12,23,987,43"
Benchmark.bm(7) do |b|
b.report('[0]') { N.times { "[12,23,987,43"[0] = '' } }
b.report('sub') { N.times { "[12,23,987,43".sub(/^\[+/, "") } }
b.report('gsub') { N.ti...
What does the `forall` keyword in Haskell/GHC do?
...ementation" again, it will be too soon.)
Er, and what about simple first-order logic? forall is pretty clearly in reference to universal quantification, and in that context the term existential makes more sense as well, though it would be less awkward if there were an exists keyword. Whether quant...
Mocking Extension Methods with Moq
... DoWorkMethod
{
[ExcludeFromCodeCoverage]
get { return _DoWorkMethod ?? (_DoWorkMethod = (obj, val) => { return obj.DoWork(val); }); }
set { _DoWorkMethod = value; }
} private Func<IMyObject, string, object> _DoWorkMethod;
Then you call the Func instead of ...
How to write to a file in Scala?
...re the main entry points into the Scala IO File API.
import scalax.io._
val output:Output = Resource.fromFile("someFile")
// Note: each write will open a new connection to file and
// each write is executed at the begining of the file,
// so in this case the last write will be th...