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Need a simple explanation of the inject method

I'm looking at this code but my brain is not registering how the number 10 can become the result. Would someone mind explaining what's happening here? ...
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Generate a random point within a circle (uniformly)

...andom point on BC. Ie. pick a pair of random numbers x and y uniformly on [0,R] giving distances from the center. Our triangle is a thin sliver so AB and BC are essentially parallel. So the point Z is simply a distance x+y from the origin. If x+y>R we fold back down. Here's the complete algorith...
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Matplotlib discrete colorbar

...rm as normalizer for your scatter. The quirky bit (in my method) is making 0 showup as grey. For images i often use the cmap.set_bad() and convert my data to a numpy masked array. That would be much easier to make 0 grey, but i couldnt get this to work with the scatter or the custom cmap. As an ...
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How do I get an object's unqualified (short) class name?

... jeremysawesome 6,15733 gold badges3030 silver badges3232 bronze badges answered Nov 11 '13 at 15:09 lonesomedaylonesomeday ...
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How can I create a two dimensional array in JavaScript?

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Specify pane percentage in tmuxinator project

...r use with select-layout. For example: $ tmux list-windows 0: ksh [159x48] layout: bb62,159x48,0,0{79x48,0,0,79x48,80,0} $ tmux select-layout bb62,159x48,0,0{79x48,0,0,79x48,80,0} tmux automatically adjusts the size of the layout for the current window size. Not...
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Boolean Field in Oracle

...as JDBC, OCCI, and other programming environments, it's better to select 0 for false and 1 for true so it can work correctly with the getBoolean and setBoolean functions. Basically they advocate method number 2, for efficiency's sake, using values of 0/1 (because of interoperability with JD...
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how to use sed, awk, or gawk to print only what is matched?

... tried * instead and I added p tag for printing match: sed -n 's/^.*abc\([0-9]*\)xyz.*$/\1/p' example.txt For matching at least one numeric character without +, I would use: sed -n 's/^.*abc\([0-9][0-9]*\)xyz.*$/\1/p' example.txt ...
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How to generate a random string in Ruby

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print call stack in C or C++

... 80 For a linux-only solution you can use backtrace(3) that simply returns an array of void * (in fa...