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Check for installed packages before running install.packages() [duplicate]
...r) and signal - both have a function filter. Since I use dplyr::filter way more often, I wanted a way to check if signal is installed but not load it.
– Mario Reutter
Apr 11 '19 at 9:33
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Image comparison - fast algorithm
...om points is picking 100 important points. Certain parts of an image have more information than others (particularly at edges and corners), and these are the ones you'll want to use for smart image matching. Google "keypoint extraction" and "keypoint matching" and you'll find quite a few academic ...
Effective method to hide email from spam bots
...e to make use of the right-to-left mark to override the writing direction. more about this: https://en.wikipedia.org/wiki/Right-to-left_mark
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Scanner vs. StringTokenizer vs. String.Split
...a particular token, they won't help you with that.
StringTokenizer is even more restrictive than String.split(), and also a bit fiddlier to use. It is essentially designed for pulling out tokens delimited by fixed substrings. Because of this restriction, it's about twice as fast as String.split(). (...
How do you trigger a block after a delay, like -performSelector:withObject:afterDelay:?
... NSLog(@"parameter1: %d parameter2: %f", parameter1, parameter2);
});
More: https://developer.apple.com/documentation/dispatch/1452876-dispatch_after
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What specific productivity gains do Vim/Emacs provide over GUI text editors?
...e as the "windowed" interface that Vim/Emacs give you. You can see two or more files at the same time side-by-side. The more you can see on-screen, the more you free your mind to think about your problem rather than doing mental bookkeeping of variable names and function signatures.
Don't underest...
Placement of the ng-app directive (html vs body)
... it's faster and how much faster it could be, are you able to explain that more or do you have any references that can illustrate this?
– MattDavis
Apr 3 '13 at 18:02
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How to get the difference between two arrays in JavaScript?
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Why doesn't delete set the pointer to NULL?
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I think this could use some more explanation. I'm not even sure what he's saying...I suppose I'll have to come back at a later time when I can dedicate a couple hrs to researching this until I get it. Or, you could expound upon the answer to help us und...
Objective-C: Property / instance variable in category
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