Compare 2 dataframes - number of differences per column

[mikecrobp]

I use R a fair amount for testing. I have used all_equal which is good at finding how many rows differ between dataframes
But I would like to report on the number of differences per column. Is there a function to do that already please?

I know that the 2 dataframes have the same column names in the same order and that the rows are same by key field and in the same order

[mikecrobp]

Turns out that the function is not that difficult to write - albeit not great code quality and no parameter checking
But would love to hear if such a function does exist

DiffPerCol = function(df1, df2) {
  cn = colnames(df1)
  Output = tibble()
  
  for (c in cn) {
    te = testequal(df1[,c], df2[,c])
    tesum = sum(!te)
    
    FirstDiff = match(FALSE, te)
    Output = rbind(Output, cbind(column = c, ndifferences = tesum, firstdifference = FirstDiff))
  }
  
  Output
}