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  1. O=->l{g=l.size
  2. r=l.sort
  3. s=l.inject(:+)+0.0
  4. m=s/g
  5. p s,l.inject(:*),m,g%2>0?r[g/2]:(r[g/2]+r[g/2-1])/2.0,l.each_cons(2).map{|l|l[1]-l[0]},r,r[0],r[-1],(l.inject(0){|e,i|e+(i-m)**2}/g)**0.5}
  6.  
  7. O[[1,2,3,4]]
Success #stdin #stdout 0s 4716KB
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stdin
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Standard input is empty
stdout
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10.0
24
2.5
2.5
[1, 1, 1]
[1, 2, 3, 4]
1
4
1.118033988749895
https://ideone.com/7PTRq
language:
Ruby (ruby 2.5.5)
created:
12 years ago
visibility:
public

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