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Calculating the difference between two Java date instances
...lass in Scala and want to compare a Date object and the current time. I know I can calculate the delta by using getTime():
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Plot two graphs in same plot in R
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How to use the same if x is different? Say, I have x1 and y1 for one graph and add another graph of x2 and y2 in the same graph. Both x1 and x2 have same range but different values.
– Kavipriya
Oct 21 '15 a...
What are invalid characters in XML
...hat's not quite true. A number of lower ascii characters are invalid also. If you try to write 0x03 to an Xml document you get an error typically and if you do manage to properly escape it into an XML document, most viewers will complain about the invalid character. Edge case but it does happen.
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Display image as grayscale using matplotlib
...asarray(image)
plt.imshow(arr, cmap='gray', vmin=0, vmax=255)
plt.show()
If you want to display the inverse grayscale, switch the cmap to cmap='gray_r'.
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How to add 30 minutes to a JavaScript Date object?
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* Example: dateAdd(new Date(), 'minute', 30) //returns 30 minutes from now.
* https://stackoverflow.com/a/1214753/18511
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* @param date Date to start with
* @param interval One of: year, quarter, month, week, day, hour, minute, second
* @param units Number of units of the given interval...
URLWithString: returns nil
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breaks if the URL has a # in it. stringByAddingPercentEscapesUsingEncoding converts # to %2
– Ali Saeed
Mar 2 '16 at 21:21
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How to get all possible combinations of a list’s elements?
...t iterable.
Combinations are emitted in lexicographic sort order. So, if the
input iterable is sorted, the
combination tuples will be produced in
sorted order.
Since 2.6, batteries are included!
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How can I sharpen an image in OpenCV?
...k to the wikipedia has been given above. digital_unsharp_masking to be specific
– tilaprimera
May 2 '14 at 5:35
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Performing Breadth First Search recursively
...s, to implement something that follows the semantics of BFS at some cost. If the cost of comparison is expensive but node traversal is cheap, then as @Simon Buchan did, you can simply run an iterative depth-first search, only processing the leaves. This would mean no growing queue stored in the he...
Scala underscore - ERROR: missing parameter type for expanded function
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