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Peak-finding algorithm for Python/SciPy
I can write something myself by finding zero-crossings of the first derivative or something, but it seems like a common-enough function to be included in standard libraries. Anyone know of one?
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explicit casting from super class to subclass
...dog = (Dog) animal; does not generate a compilation error, but at runtime it generates a ClassCastException . Why can't the compiler detect this error?
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Android: Difference between Parcelable and Serializable?
...de 2 interfaces for serializing objects? Do Serializable objects interopt with Android Binder and AIDL files?
15 Answers
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What is the difference between “#!/usr/bin/env bash” and “#!/usr/bin/bash”?
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Running a command through /usr/bin/env has the benefit of looking for whatever the default version of the program is in your current environment.
This way, you don't have to look for it in a specific place on the system, as those paths may be in different locations on differe...
Initializing a static std::map in C++
What is the right way of initializing a static map? Do we need a static function that will initialize it?
11 Answers
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How to print Unicode character in Python?
...scape characters in the form \u0123 in your string, and prefix the string literal with 'u'.
Here's an example running in the Python interactive console:
>>> print u'\u0420\u043e\u0441\u0441\u0438\u044f'
Россия
Strings declared like this are Unicode-type variables, as described in ...
Python string prints as [u'String']
This will surely be an easy one but it is really bugging me.
10 Answers
10
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Cleanest way to write retry logic?
...m. Having said that, here's a lambda-based retry wrapper that you can use with any method. I chose to factor the number of retries and the retry timeout out as parameters for a bit more flexibility:
public static class Retry
{
public static void Do(
Action action,
TimeSpan retry...
wkhtmltopdf: cannot connect to X server
...ctly, but through many requests by developers to have this run on servers without GUI, I am pretty sure it runs a virtual X server in the static version . I have been using the static (stand-alone) version of the program and it works great! I would put the executable file in a folder, and run:
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Iterating through a Collection, avoiding ConcurrentModificationException when removing objects in a
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Iterator.remove() is safe, you can use it like this:
List<String> list = new ArrayList<>();
// This is a clever way to create the iterator and call iterator.hasNext() like
// you would do in a while-loop. It wou...