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What is the best way to count “find” results?

My current solution would be find <expr> -exec printf '.' \; | wc -c , but this takes far too long when there are more than 10000 results. Is there no faster/better way to do this? ...
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Overlaying histograms with ggplot2 in R

...roblem is that you don't see where 2 histograms overlap - they look rather cut off. 3 Answers ...
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Fastest way to remove first char in a String

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What's the meaning of * (asterisk) in XAML ColumnDefinition?

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How can I count the number of matches for a regex?

Let's say I have a string which contains this: 5 Answers 5 ...
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Blocks on Swift (animateWithDuration:animations:completion:)

I'm having trouble making the blocks work on Swift. Here's an example that worked (without completion block): 7 Answers ...
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Matplotlib transparent line plots

I am plotting two similar trajectories in matplotlib and I'd like to plot each of the lines with partial transparency so that the red (plotted second) doesn't obscure the blue. ...
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Confusion between factor levels and factor labels

There seems to be a difference between levels and labels of a factor in R. Up to now, I always thought that levels were the 'real' name of factor levels, and labels were the names used for output (such as tables and plots). Obviously, this is not the case, as the following example shows: ...
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Difference between '..' (double-dot) and '…' (triple-dot) in range generation?

I've just started learning Ruby and Ruby on Rails and came across validation code that uses ranges: 5 Answers ...
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Fill between two vertical lines in matplotlib

I went through the examples in the matplotlib documentation, but it wasn't clear to me how I can make a plot that fills the area between two specific vertical lines. ...