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How do I find Waldo with Mathematica?
... many images of Waldo - all variations of him sitting, standing, occluded, etc.; shirt, hat, camera, and all the works. You don't need a large corpus of Waldos (maybe 3-5 will be enough), but the more the better.
This will assign clouds of probabilities to various elements occurring in whatever the...
How to calculate the difference between two dates using PHP?
...mponents.
* If the interval doesn't have a time component (years, months, etc)
* That component won't be displayed.
*
* @param DateInterval $interval The interval
*
* @return string Formatted interval string.
*/
function format_interval(DateInterval $interval) {
$result = "";
if ($int...
Redirect website after certain amount of time
...of HTTP redirect headers and/or you need to support non-JavaScript clients etc).
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How can I set a website image that will show as preview on Facebook?
...
Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Set up DNS based URL forwarding in Amazon Route53 [closed]
...ct to the aws signin page.
Go to your nginx conf folder (in my case it's /etc/nginx/sites-available in which I create a symlink to /etc/nginx/sites-enabled for the enabled conf files).
Then add a redirect path
server {
listen 80;
server_name aws.example.com;
return 301 https://myaccount.si...
Android accelerometer accuracy (Inertial navigation)
... speeds, with different steps, and puts their phones in different pockets, etc. Surely to implement this in the real world would require number-crunching to be handled server-side.
If you did use GPS for the initial baseline, part of the problem there is GPS tends to have it's own migrations over t...
How can I remove all my changes in my SVN working directory?
...
Remove any other change and supports removing files/folders with spaces, etc.
svn status --no-ignore | grep -E '(^\?)|(^\I)' | sed -e 's/^. *//' | sed -e 's/\(.*\)/"\1"/' | xargs rm -rf
Don't forget to get the latest files from SVN
svn update --force
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How do I find the duplicates in a list and create another list with them?
...perform better. This code computes a list of unique elements in the source order:
seen = set()
uniq = []
for x in a:
if x not in seen:
uniq.append(x)
seen.add(x)
or, more concisely:
seen = set()
uniq = [x for x in a if x not in seen and not seen.add(x)]
I don't recommen...
How can I find the current OS in Python? [duplicate]
...rmation on the machine architecture, OS and OS version, version of Python, etc. Also it has os-specific functions to get things like the particular linux distribution.
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PostgreSQL query to list all table names?
...l databases
SELECT table_schema,table_name FROM information_schema.tables
ORDER BY table_schema,table_name;
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