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How do I ALTER a PostgreSQL table and make a column unique?
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278
I figured it out from the PostgreSQL docs, the exact syntax is:
ALTER TABLE the_table ADD CON...
Find size of Git repository
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269
UPDATE git 1.8.3 introduced a more efficient way to get a rough size: git count-objects -vH...
How to crop an image in OpenCV using Python
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It's very simple. Use numpy slicing.
import cv2
img = cv2.imread("lenna.png")
crop_img = img[y:y+h, x:x+w]
cv2.imshow("cropped", crop_img)
cv2.waitKey(0)
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Can you list the keyword arguments a function receives?
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152
A little nicer than inspecting the code object directly and working out the variables is to use ...
What is the difference between Strategy design pattern and State design pattern?
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answered Oct 12 '12 at 23:10
user597474user597474
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window.close and self.close do not close the window in Chrome
...').close();
This is buggy behavior, IMO, and is now (as of roughly April 2015) mostly blocked. It will still work from injected code only if the tab is freshly opened and has no pages in the browsing history. So it's only useful in a very small set of circumstances.
However, a variation still ...
jQuery remove all list items from an unordered list
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280
$("ul").empty() works fine. Is there some other error?
$('input').click(function() {
$...
Delaying a jquery script until everything else has loaded
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218
You can have $(document).ready() multiple times in a page. The code gets run in the sequence i...