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Sockets - Amy #12

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28 changes: 27 additions & 1 deletion lib/matrix_convert_to_zero.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -6,5 +6,31 @@
# Time complexity: ?
# Space complexity: ?
def matrix_convert_to_zero(matrix)
raise NotImplementedError
new_matrix = []
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@CheezItMan CheezItMan May 12, 2019

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What do you think the space & time complexities are?

rows_w_0 = {}
cols_w_0 = {}

matrix.length.times do |x|
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@CheezItMan CheezItMan May 12, 2019

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This definitely works, but you could also use the 0th index of the row and columns to serve the same role as the rows_w_0 and cols_w_0 arrays.

matrix[x].length.times do |y|
if matrix[x][y] == 0
rows_w_0[x] = true
cols_w_0[y] = true
end
end
end

matrix.length.times do |x|
matrix[x].length.times do |y|
if rows_w_0[x] == true || cols_w_0[y] == true
matrix[x][y]=0
else
end
end
end
return matrix
end