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Home/ Questions/Q 3797238
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Editorial Team
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Editorial Team
Asked: May 19, 20262026-05-19T13:22:22+00:00 2026-05-19T13:22:22+00:00

[[0, 1, 2], [2, 1, 0], [0, 1, 2]] What is an easy way

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[[0, 1, 2],
 [2, 1, 0],
 [0, 1, 2]]

What is an easy way to check of this matrix has all values down a column the same?

[[0, 1, 0],
 [2, 2, 2],
 [0, 1, 2]]

And then horizontally?

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  1. Editorial Team
    Editorial Team
    2026-05-19T13:22:22+00:00Added an answer on May 19, 2026 at 1:22 pm

    1.

    a.map{|row|row[x]}.uniq.size == 1
    

    or

    a.transpose[x].uniq.size == 1
    

    2.

    a[x].uniq.size == 1
    
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