arrays - Ruby diagonal matrix from random numbers -

i need create diagonal matrix (8x8) , fill random numbers in [-30..45] range after need transform array vector , sort it

i tried different ways.

at first create matrix (8x8)

matrix = matrix.build(8) {0} puts matrix.each_slice(matrix.column_size) {|r| p r } 

also made array random numbers in range

array = (-30..45).to_a.shuffle puts array [0..8] 

and made diagonal matrix

matrixd = matrix.diagonal(1,2,3,4,5,6,7,8) puts matrixd.each_slice(matrix.column_size) {|r| p r} 

how can fill diagonal matrix array , put in vector? have 2 algorithms sorting vector

class array   def bubblesort!     length.times |j|       in 1...(length - j)         if self[i] < self[i - 1]           self[i], self[i - 1] = self[i - 1], self[i]         end       end     end     self   end end  class array   def selectionsort!     0.upto(length - 2) |i|       (min_idx = + 1).upto(length - 1) |j|         if self[j] < self[min_idx]           min_idx = j         end       end       if self[i] > self[min_idx]         self[i], self[min_idx] = self[min_idx], self[i]       end     end     self   end end 

for diagonal matrix:

elems = [*-30..45].sample(8) matrix.diagonal(*elems) 

for rest, i'm not sure you're trying accomplish