Is Column Singular

Not only do singularities cause havoc to the fabric of spacetime, but they also cause your table splits to fall apart and your models to break with ugly error messages.

Today’s function is a utility to evaluate an individual data column to evaluate whether it is singular (i.e. the column has constant values through all of the rows).

I have a suspicion there might be a better way of doing this.  Can you think of one?

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