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Tomcat startup logs - SEVERE: Error filterStart how to get a stack trace?
...but it is not always clear where the log files are, when tomcat is started from an IDE. When I start it from IntelliJ, CATALINA_BASE is set to ${home}/.IntelliJIdea10/system/tomcat/Unnamed_r6-idea, and the log files are in in [CATALINA_BASE]/logs.
To see the logs, either locate the log files, or ed...
What are the advantages of NumPy over regular Python lists?
...o efficiently implemented.
For example, you could read your cube directly from a file into an array:
x = numpy.fromfile(file=open("data"), dtype=float).reshape((100, 100, 100))
Sum along the second dimension:
s = x.sum(axis=1)
Find which cells are above a threshold:
(x > 0.5).nonzero()
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Stripping everything but alphanumeric chars from a string in Python
What is the best way to strip all non alphanumeric characters from a string, using Python?
11 Answers
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Nested classes' scope?
... @George Note that the example with class A isn't mine, it is from the Python official doc whose I gave link. This example fails and that failure is what is wanted to be shown in this example. In fact list(a + i for i in range(10)) is list((a + i for i in range(10))) that is to say list...
How do I uniquely identify computers visiting my web site?
... one possible fingerprinting algorithm, and collected these
fingerprints from a large sample of browsers that visited our test side,
panopticlick.eff.org. We observe that the distribution of our finger-
print contains at least 18.1 bits of entropy, meaning that if we pick a
brow...
What is the difference between an IntentService and a Service? [duplicate]
...orget" operations, taking care of background Thread creation and cleanup.
From the docs:
Service
A Service is an application component representing either an application's desire to perform a longer-running operation while not interacting with the user or to supply functionality for other applicat...
Define: What is a HashSet?
...anaging an array and storing the object using an index which is calculated from the hashcode of the object. Take a look here
HashSet is an unordered collection containing unique elements. It has the standard collection operations Add, Remove, Contains, but since it uses a hash-based implementation, ...
How to format time since xxx e.g. “4 minutes ago” similar to Stack Exchange sites
...datetime library, to use it for such scenario, you'd do:
moment(yourdate).fromNow()
http://momentjs.com/docs/#/displaying/fromnow/
2018 addendum: Luxon is a new modern library and might be worth a look!
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How to delete shared preferences data from App in Android
...a commit()
If you don't care about the return value and you're using this from your application's main thread, consider using apply() instead.
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Optimal settings for exporting SVGs for the web from Illustrator?
...ing.
Optimize for Adobe SVG Viewer
Adobe SVG Viewer is a browser plugin from times when browsers did not support SVG natively. I don't know what it does, but it is irrelevant, do not check this.
Include slicing data
This adds metadata bloat to your SVG file, unless you plan on opening your SVG ...