library(purrr)
#Create fake data where 10 is the number of Replications
array1<-matrix(sample(letters,100, replace=T), 10)
array2<-matrix(sample(letters,100, replace=T), 10)
#Split matrixes into list of row vectors.
rowvec1<-split(array1, row(array1))
rowvec2<-split(array2, row(array2))
map2(rowvec1, rowvec2,~sum(is.element(.x, .y)))
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