http://r4ds.had.co.nz/transform.html#filter-rows-with-filter

]]>nameSample(“hello”, progress=T, estimate=F)

Computation time was: 2.95 minutes.

set.seed(12173423); paste(sample(letters,5,T), collapse=”)

Computation time was: 1.92 minutes.

set.seed(7723132); paste(sample(letters,5,T), collapse=”)