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Get hostname of current request in node.js Express
...q.headers.host is provided by the user. I can craft a request in 1 line of python and send you a request without that field making your code crash
– arboreal84
Jul 28 '16 at 18:31
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Difference between filter and filter_by in SQLAlchemy
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filter_by uses keyword arguments, whereas filter allows pythonic filtering arguments like filter(User.name=="john")
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Matplotlib scatterplot; colour as a function of a third variable
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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...