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How do I create a URL shortener?
...two character checksum to the url. That would prevent direct iteration of all the urls in your system. Something simple like f(checksum(id) % (62^2)) + f(id) = url_id
– koblas
Sep 4 '10 at 13:53
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Converting NumPy array into Python List structure?
...ype" (in a list). If you want to preserve the numpy data types, you could call list() on your array instead, and you'll end up with a list of numpy scalars. (Thanks to Mr_and_Mrs_D for pointing that out in a comment.)
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Static linking vs dynamic linking
...n how well it works.
The way to answer performance questions is always by testing (and use a test environment as much like the deployment environment as possible).
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How can I tell if a DOM element is visible in the current viewport?
...most never precise. You can read more about its bugs.
This solution was tested on Internet Explorer 7 (and later), iOS 5 (and later) Safari, Android 2.0 (Eclair) and later, BlackBerry, Opera Mobile, and Internet Explorer Mobile 9.
function isElementInViewport (el) {
// Special bonus f...
Modular multiplicative inverse function in Python
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If you happen to be using sympy, then x, _, g = sympy.numbers.igcdex(a, m) does the trick.
– Lynn
Sep 16 '16 at 18:15
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Python: Check if one dictionary is a subset of another larger dictionary
...a set-like view of the dict items. You can then use the <= operator to test if one view is a "subset" of the other:
d1.items() <= d2.items()
In Python 2.7, use the dict.viewitems() to do the same:
d1.viewitems() <= d2.viewitems()
In Python 2.6 and below you will need a different solu...
Running script upon login mac [closed]
... (from the Actions/Utilities)
copy & paste your script into the window
test it
save somewhere (for example you can make an Applications folder in your HOME, you will get an your_name.app)
go to System Preferences -> Accounts -> Login items
add this app
test & done ;)
EDIT:
I've rec...
Ignore invalid self-signed ssl certificate in node.js with https.request?
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I was having trouble with running tests using mocha on my self-signed https node server, and adding this immediately before any describe blocks made my tests pass.
– artis3n
Jul 30 '15 at 14:33
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How to reset sequence in postgres and fill id column with new data?
... This might cause duplicate ids. To prevent this, you can first set all to very high values: UPDATE t SET idcolumn=1000000+ nextval('seq'); then run the above script.
– tahagh
Nov 28 '13 at 13:15
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Quickly create large file on a Windows system
... file createnew does NOT create sparse files: c:\>fsutil file createnew test.txt 0x100000 File c:\test.txt is created c:\>fsutil sparse queryflag test.txt This file is NOT set as sparse
– ivan_pozdeev
Oct 20 '17 at 6:29
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