Gagolewski M., stringi: Fast and portable character string processing in R, Journal of Statistical Software 103(2), 2022, 1-59, tools:::Rd_expr_doi("10.18637/jss.v103.i02")
Other random:
stri_rand_lipsum(),
stri_rand_strings()
stri_rand_shuffle(c('abcdefghi', '0123456789'))
# you can do better than this with stri_rand_strings:stri_rand_shuffle(rep(stri_paste(letters, collapse=''), 10))