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Most efficient way to concatenate strings?
...many concatenations. It isn't trivial to find out for any given situation. If performance is of issue, profiling is your friend (check ANTS).
– Abel
Nov 4 '09 at 13:22
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How to write lists inside a markdown table?
... @TreborRude No, because Markdown is not HTML actually. But if you use a library (e.g. marked), you probably have this feature (to combine HTML with markdown).
– Ionică Bizău
Aug 5 '14 at 12:59
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Indenting #defines
.... Use which ever style (space before "#" or space between "#" and the identifier) you prefer.
http://www.delorie.com/gnu/docs/gcc/cpp_48.html
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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 get UTC time in Python?
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Try this code that uses datetime.utcnow():
from datetime import datetime
datetime.utcnow()
For your purposes when you need to calculate an amount of time spent between two dates all that you need is to substract end and start dates. The results of such subst...
Scala underscore - ERROR: missing parameter type for expanded function
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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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MFC 的SetWindowPos 用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...NT uFlags // window-positioning flags
);
参数解释:
hWnd
Identifies the window. 窗口句柄
hWndInsertAfter 窗口叠层位置
Identifies the window to precede the positioned window in the Z order. This parameter must be a window handle or one of the following values:
Value Meanin...
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...