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What are the Ruby Gotchas a newbie should be warned about? [closed]
... false
(1..10) === (1..10) # false (the range does not include itself)
# arrays just match equal arrays, but they do not match included values!
[1,2,3] === [1,2,3] # true
[1,2,3] === 2 # false
# classes match their instances and instances of derived classes
String === "joe" # true
String ...
What is null in Java?
...tial Values of Variables
Each class variable, instance variable, or array component is initialized with a default value when it is created:
For all reference types, the default value is null.
How this is used varies. You can use it to enable what is called lazy initialization...
How can I configure Logback to log different levels for a logger to different destinations?
...ingEvent = (LoggingEvent) event;
List<Level> eventsToKeep = Arrays.asList(Level.TRACE, Level.DEBUG, Level.INFO);
if (eventsToKeep.contains(loggingEvent.getLevel()))
{
return FilterReply.NEUTRAL;
}
else
{
return FilterRepl...
Why must a nonlinear activation function be used in a backpropagation neural network? [closed]
...st above).
>>> in_vec = NP.random.rand(10)
>>> in_vec
array([ 0.94, 0.61, 0.65, 0. , 0.77, 0.99, 0.35, 0.81, 0.46, 0.59])
>>> # common activation function, hyperbolic tangent
>>> out_vec = NP.tanh(in_vec)
>>> out_vec
array([ 0.74, 0.54, 0...
HTML5 record audio to file
...nction mergeBuffers(recBuffers, recLength){
var result = new Float32Array(recLength);
var offset = 0;
for (var i = 0; i < recBuffers.length; i++){
result.set(recBuffers[i], offset);
offset += recBuffers[i].length;
}
return result;
}
...
How to write to a file in Scala?
...ite will replace
// an existing file with the new data
file.write (Array (1,2,3) map ( _.toByte))
// another option for write is openOptions which allows the caller
// to specify in detail how the write should take place
// the openOptions parameter takes a collections of OpenOp...
Pry: show me the stack
...defined inside the gem library. The return value of that method will be an array. So you can event apply array methods for search in that bunch of lines
Below is also helpful for powerful trace.
https://github.com/pry/pry-stack_explorer
...
Difference between DirectCast() and CType() in VB.NET
...you could with a C# (int) cast. But you can cast from an IEnumerable to an array, if your underlying IEnumerable object variable really is an Array. And of course you can cast from Object to anything, assuming the type of your object instance really is somewhere below your cast type in the inheritan...
How to replace all strings to numbers contained in each string in Notepad++?
...ve Notepad++ v6.8.8
Find: [([a-zA-Z])]
Replace: [\'\1\']
Will produce:
$array[XYZ] => $array['XYZ']
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How can I iterate through the unicode codepoints of a Java String?
...orEach(c -> ...);
or with a for loop by collecting the stream into an array:
for(int c : string.codePoints().toArray()){
...
}
These ways are probably more expensive than Jonathan Feinbergs's solution, but they are faster to read/write and the performance difference will usually be insig...