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Calculate distance between 2 GPS coordinates
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Here's a Haversine function in Python that I use:
from math import pi,sqrt,sin,cos,atan2
def haversine(pos1, pos2):
lat1 = float(pos1['lat'])
long1 = float(pos1['long'])
lat2 = float(pos2['lat'])
long2 = float(pos2['long'])
degree_to...
How do you query for “is not null” in Mongo?
...({"IMAGE URL":{"$ne":None}});
Because pymongo represents mongo "null" as python "None".
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Move the mouse pointer to a specific position?
... a small web server on the client machine. Can be a small 100kb thing. A Python / Perl script, etc.
Include a small, pre-compiled C executable that can move the mouse.
Run it as a CGI-script via a simple http call, AJAX, whatever - with the coordinates you want to move the mouse to, eg:
http://lo...
libpng warning: iCCP: known incorrect sRGB profile
...nality. However, I had images buried in sub-folders, so I used this simple Python script to apply this to all images in all sub-folders and thought it might help others:
import os
import subprocess
def system_call(args, cwd="."):
print("Running '{}' in '{}'".format(str(args), cwd))
subproc...
Get encoding of a file in Windows
...iations of Get-FileEncoding on poshcode. I've even reviewed punycode from python and nodejs, but this small version hits 80/20 for my usage (more like 99/1). If you're hosting other people's files I suggest you use file command from Syben's answer (stackoverflow.com/a/34766140/195755) or another pr...
How do I determine k when using k-means clustering?
... Just adding a link to the Silhouette Analysis tutorial for python users scikit-learn.org/stable/auto_examples/cluster/…
– Chaitanya Shivade
May 8 '17 at 17:46
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Set value of hidden field in a form using jQuery's “.val()” doesn't work
...), which is correctly parsed by parseInt in Javascript as well as int() in Python, my backend.
– rattray
Feb 26 '14 at 23:32
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Why is Dictionary preferred over Hashtable in C#?
...atters further, some languages call their hash tables "dictionaries" (e.g. Python) - but the proper CS term is still hash table.
– Michael Madsen
Jun 20 '13 at 17:57
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Can we have functions inside functions in C++?
...+ nor in other languages that I’ve worked with – which don’t include Python and Ada, for the record). Furthermore, making that distinction is just not meaningful in C++ because C++ does not have local functions, period. It only has lambdas. If you want to limit the scope of a function-like thi...
Assign output to variable in Bash
...rl -s 'http://169.254.169.254/latest/dynamic/instance-identity/document' | python -c "import sys, json; print json.load(sys.stdin)['region']")
echo $INSTANCE_REGION
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