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Socket.IO - how do I get a list of connected sockets/clients?
...omes io.connected, io.sockets.adapter.rooms becomes io.adapter.rooms ...)
Tested on socket.io 1.3.5
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Python debugging tips [closed]
...-friendly package. PuDB allows you to debug code right where you write and test it – in a terminal. If you've worked with the excellent (but nowadays ancient) DOS-based Turbo Pascal or C tools, PuDB's UI might look familiar.
Nice for debugging standalone scripts, just run
python -m pudb.run m...
Real differences between “java -server” and “java -client”?
...intended for executing long-running server applications, which need the fastest possible operating speed more than a fast start-up time or smaller runtime memory footprint.
The Client VM compiler serves as an upgrade for both the Classic VM and the just-in-time (JIT) compilers used by previous versi...
How to rename items in values() in Django?
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Without using any other manager method (tested on v3.0.4):
from django.db.models import F
MyModel.objects.values(renamed_value=F('cryptic_value_name'))
Excerpt from Django docs:
An F() object represents the value of a model field or annotated
column. It m...
Is there a W3C valid way to disable autocomplete in a HTML form?
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This would make automatic testing harder.
– David Waters
Feb 24 '09 at 16:16
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How to exit from Python without traceback?
...ystemExit:
import os
os._exit(1)
I do this, in code that runs under unittest and calls fork(). Unittest gets when the forked process raises SystemExit. This is definitely a corner case!
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Preserving signatures of decorated functions
... wrapper.__signature__ helps on earlier versions? (which versions have you tested?)
– jfs
Jan 5 '16 at 3:02
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Rename multiple files by replacing a particular pattern in the filenames using a shell script [dupli
...es and is easily configurable. Also, the example gives the non-destructive test to make sure the changes are correct.
– Dan Mergens
Jan 15 '18 at 21:16
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Where to define custom error types in Ruby and/or Rails?
...w I'm handling custom errors in Rails, including attaching error messages, testing, and how to handle this with ActiveRecord models.
Creating Custom Error
class MyClass
# create a custome error
class MissingRequirement < StandardError; end
def my_instance_method
raise MyClass::Miss...
Is it possible to use 'else' in a list comprehension? [duplicate]
...try out the below snippet. This would resolve your problem, the snippet is tested on python 2.7 and python 3.5.
obj = ["Even" if i%2==0 else "Odd" for i in range(10)]
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