Define a function that behaves in the same way as mean(x) and mean(x,d) except that it ignores NaNs (unless all of the values being averaged are NaNs, in which case the result for those values should be NaN).
Which doors are open?
Count from 0 to N^M in base N.
Back to basics 5 - Clipboard
What is the distance from point P(x,y) to the line Ax + By + C = 0?
Find the nearest integer
James Bond film count
Evaluating continued fractions
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