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How do I check the difference, in seconds, between two dates?
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if you want to compute differences between two known dates, use total_seconds like this:
import datetime as dt
a = dt.datetime(2013,12,30,23,59,59)
b = dt.datetime(2013,12,31,23,59,59)
(b-a).total_seconds()
86400.0
#note that seconds doesn't give you what you want:
(...
Is there a way to detect if a browser window is not currently active?
...ecommendation status thanks to the W3C. The Page Visibility API (on MDN) now allows us to more accurately detect when a page is hidden to the user.
document.addEventListener("visibilitychange", onchange);
Current browser support:
Chrome 13+
Internet Explorer 10+
Firefox 10+
Opera 12.10+ [read...
Android Studio - How to increase Allocated Heap Size
I've been using Android Studio for 3 months now and one of the apps I started on it has become fairly large. The memory usage indicated at the bottom right of the program says my allocated heap is maxed at 494M.
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How to implement common bash idioms in Python? [closed]
...I just discovered how to combine the best parts of bash and ipython. Up to now this seems more comfortable to me than using subprocess and so on. You can easily copy big parts of existing bash scripts and e.g. add error handling in the python way :)
And here is my result:
#!/usr/bin/env ipython3
#...
Virtual Serial Port for Linux
...en another terminal and write (Terminal 2):
echo "Test" > /dev/pts/3
Now back to Terminal 1 and you'll see the string "Test".
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Specifying rails version to use when creating a new application
... that having Rails 3 installed fails for 2.3.5 -- Just tested on Mac OS X Snow Leopard with these modules installed:rails (3.0.5, 2.3.5, 2.2.2, 1.2.6)
– Mike
May 2 '11 at 19:41
13
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How to exit from PostgreSQL command line utility: psql
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As of PostgreSQL 11 you can now type "quit" or "exit".
– aorth
Oct 19 '18 at 8:23
1
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How to copy Docker images from one host to another without using a repository
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I used the image id instead of the name:tag Now I'm sitting here, loaded the image and have a <none> for REPOSITORY and TAG. What is the right way to bring the name and tag back? @wisbucky
– Ulfhetnar
Jan 10 '18 at 7:37
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Doing a cleanup action just before Node.js exits
...r-LucGendreau where does this specific code go?
– hownowbrowncow
Mar 28 '16 at 20:04
11
I've foun...
Generating random integer from a range
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Nowadays this should be the answer. Pseudo-random number generation reference for more features.
– alextoind
Sep 28 '15 at 15:11
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