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How to find a Java Memory Leak
... to your application classes. This will give a pretty good hint. Here is a pythons script that can help you compare two jmap histogram dumps. histogramparser.py
Finally tools like JConolse and VisualVm are essential to see the memory growth over time, and see if there is a memory leak. Finally som...
Difference between web reference and service reference?
... only ASMX, but Web References can also talk to Java-based Web Services or Python-based or Ruby so long as they all talk WSDL and conform to the WS-I interoperability standard).
A Service Reference will create a client proxy class that communicates with a WCF-based service : regardless of whether t...
Vagrant reverse port forwarding?
...ning on port 8000 on your host machine...
echo 'Hello, guest!' > hello
python -m SimpleHTTPServer 8000
You can access it from inside the Vagrant VM at 10.0.2.2:8000 (provided 10.0.2.2 is the ip of the guest's default gateway):
vagrant ssh
curl http://10.0.2.2:8000/hello # Outputs: Hello, gues...
Can't escape the backslash with regex?
...t parse escape sequences to avoid having to use as many - for instance, in Python:
re.compile(r'\\')
The r in front of the quotes makes it a raw string which doesn't parse backslash escapes.
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Using OR in SQLAlchemy
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HTTP Content-Type Header and JSON
...nt end
My template code
template_file.json
{
"name": "{{name}}"
}
Python backed code
def download_json(request):
print("Downloading JSON")
# Response render a template as JSON object
return HttpResponse(render_to_response("template_file.json",dict(name="Alex Vera")),content_typ...
Instance variable: self vs @
...ill say that an object "sends a message to itself." Someone who came from Python will say that an object "calls a method on itself." Don't be confused; they are exactly the same thing. (A semantics purist may object that they are only the same for languages with dynamic typing and that a C++ virt...
What does numpy.random.seed(0) do?
...ot thread safe.
from differences-between-numpy-random-and-random-random-in-python:
For numpy.random.seed(), the main difficulty is that it is not
thread-safe - that is, it's not safe to use if you have many different
threads of execution, because it's not guaranteed to work if two
different threads...
What are the advantages of using a schema-free database like MongoDB compared to a relational databa
...document-based data model. The basic unit of storage is analogous to JSON, Python dictionaries, Ruby hashes, etc. This is a rich data structure capable of holding arrays and other documents. This means you can often represent in a single entity a construct that would require several tables to proper...
How do I get an apk file from an Android device?
...openssl doesn't have zlib, this might work: dd if=backup.ab bs=1 skip=24 | python -c "import zlib,sys;sys.stdout.write(zlib.decompress(sys.stdin.read()))" | tar -xvf -
– kodi
Sep 3 '13 at 21:55
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