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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 ...
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...
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...
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...
Linux反编译全攻略 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...可以到这来下载:
http://www.crackmes.de/users/veneta/crackmes/linux_crackme_v2 。古人云“工欲善其事，必先利其器”，本文中所用到的工具及操作平台罗列如下:
操作平台: gentoo 2004.3 # kernel 2.6.9
逆向工具:
反汇编 -- objdump （这个工...
Get URL query string parameters
...follow
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edited Jun 10 '19 at 19:32
tbc
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answered Dec...
How can I get dictionary key as variable directly in Python (not by searching from value)?
... not turning up anything other than how to get a dictionary's key based on its value which I would prefer not to use as I simply want the text/name of the key and am worried that searching by value may end up returning 2 or more keys if the dictionary has a lot of entries... what I am trying to do i...