Dear Rcppusers,
I can't figure out what the following codes do:
int f4(Function pred, List x) {
int n = x.size();
for(int i = 0; i < n; ++i) {
LogicalVector res = pred(x[i]);
if (res[0]) return i + 1;
}
return 0;
}
I investigated it, and understand applying a function to everypart of a list
then return a LogicalVector, but i can't understand
if the first element of the LogicalVector is true then return the row index of
the list.
Tks!
--
PO SU
mail: [email protected]
Majored in Statistics from SJTU
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