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Recommended way of making React component/div draggable
I want to make a draggable (that is, repositionable by mouse) React component, which seems to necessarily involve global state and scattered event handlers. I can do it the dirty way, with a global variable in my JS file, and could probably even wrap it in a nice closure interface, but I want to kno...
How do you detect where two line segments intersect? [closed]
... can find t and u such that:
p + t r = q + u s
Cross both sides with s, getting
(p + t r) × s = (q + u s) × s
And since s × s = 0, this means
t (r × s) = (q − p) × s
And therefore, solving for t:
t = (q − p) × s / (r × s)
In the same way, we can solve for ...
“Pretty” Continuous Integration for Python
...
You might want to check out Nose and the Xunit output plugin. You can have it run your unit tests, and coverage checks with this command:
nosetests --with-xunit --enable-cover
That'll be helpful if you want to go the Jenkins route, or if you want to use another CI ...
Bring element to front using CSS
...es to front using CSS . I've already tried setting z-index to 1000 and position to relative, but it still fails.
4 Answers...
Pass a parameter to a fixture function
...# test_parameterized_fixture.py
import pytest
class MyTester:
def __init__(self, x):
self.x = x
def dothis(self):
assert self.x
@pytest.fixture
def tester(request):
"""Create tester object"""
return MyTester(request.param)
class TestIt:
@pytest.mark.parametri...
How to access and test an internal (non-exports) function in a node.js module?
... how to test internal (i.e. not exported) functions in nodejs (preferably with mocha or jasmine). And i have no idea!
7 Ans...
Log exception with traceback
...
Use logging.exception from within the except: handler/block to log the current exception along with the trace information, prepended with a message.
import logging
LOG_FILENAME = '/tmp/logging_example.out'
logging.basicConfig(filename=LOG_FILENAME, lev...
What's the canonical way to check for type in Python?
...iven object is of a given type? How about checking whether the object inherits from a given type?
13 Answers
...
This type of CollectionView does not support changes to its SourceCollection from a thread different
...nce your ObservableCollection is created on UI thread, you can only modify it from UI thread and not from other threads. This is termed as thread affinity.
If you ever need to update objects created on UI thread from different thread, simply put the delegate on UI Dispatcher and that will do work f...
Delete files older than 15 days using PowerShell
...
The given answers will only delete files (which admittedly is what is in the title of this post), but here's some code that will first delete all of the files older than 15 days, and then recursively delete any empty directories that may have been left behind. My code also us...