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How to convert a java.util.List to a Scala list
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@mauhiz If a Scala Buffer is a Java List, then nothing is fine! The OP wanted a conversion from Java List to an immutable Scala List. Expressions that expect a Scala List won't typecheck with a Buffer.
– Andres ...
adding noise to a signal in python
...want to generate noise to give us a desired SNR.
While noise can come in different flavors depending on what you are modeling, a good start (especially for this radio telescope example) is Additive White Gaussian Noise (AWGN). As stated in the previous answers, to model AWGN you need to add a zero-...
How to set default value for form field in Symfony2?
...ersonally.
Set Data before build form
In the constructors / service, you know if you have a new entity or if it was populated from the db. It's plausible therefore to call set data on the different fields when you grab a new entity. E.g.
if( ! $entity->isFromDB() ) {
$entity->setBar('d...
Rename a dictionary key
...t;>> oldkey, newkey = '2', 'potato'
>>> OrderedDict((newkey if k == oldkey else k, v) for k, v in _.viewitems())
OrderedDict([('1', 'a'), ('potato', 'b'), ('3', 'c')])
Modifying the key itself, as this question seems to be asking, is impractical because dict keys are usually immutab...
Where can I set environment variables that crontab will use?
...$base
fi
exec $cmd ${@:+"$@"}
(Written using an older coding standard - nowadays, I'd use a shebang '#!' at the start.)
The '~/.cronfile' is a variation on my profile for use by cron - rigorously non-interactive and no echoing for the sake of being noisy. You could arrange to execute the .profi...
How to implement a rule engine?
... ExpressionType tBinary;
// is the operator a known .NET operator?
if (ExpressionType.TryParse(r.Operator, out tBinary)) {
var right = Expression.Constant(Convert.ChangeType(r.TargetValue, tProp));
// use a binary operation, e.g. 'Equal' -> 'u.Age == 21'
return Exp...
Setup a Git server with msysgit on Windows [closed]
... that you create a leading edge versioning
system without any prior Git knowledge. GitStack also makes it super
easy to secure and keep your server up to date. GitStack is built on
the top of the genuine Git for Windows and is compatible with any
other Git clients. GitStack is completely fre...
How to express a One-To-Many relationship in Django
I'm defining my Django models right now and I realized that there wasn't a OneToManyField in the model field types. I'm sure there's a way to do this, so I'm not sure what I'm missing. I essentially have something like this:
...
How to prevent IFRAME from redirecting top-level window
Some websites have code to "break out" of IFRAME enclosures, meaning that if a page A is loaded as an IFRAME inside an parent page P some Javascript in A redirects the outer window to A .
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Place cursor at the end of text in EditText
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Hey @Mullay, I am now handling it by overriding the onSelectionChanged() method of an EditText class: public void onSelectionChanged(int start, int end) { CharSequence text = getText(); if (text != null) { if (start != text.l...