This user (ALBERT ALEXANDER STONIER) appears to have gamed the system, with fraudulent "likes" of this unremarkable solution submitted by 'sock-puppet' accounts. —DIV
Distance walked 2D
Determine Whether an array is empty
Reverse the elements of an array
Square root of a number
Calculate area of sector
Determine point is located in a circle or not
Where is 1?
Replace 0 to NaN!
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