length!! and not "not isempty"... good point!
radius of a spherical planet
pressure to dB?
What is the distance from point P(x,y) to the line Ax + By + C = 0?
Return unique values without sorting
Negation and new variables
Permute diagonal and antidiagonal
Two functions (to be sure)
Without the French accent please!
Generalised Hamming Number
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