On 12/26/18 10:49 PM, Peng Yu wrote: > Although [[ -z ${1+s} ]] and (($#)) works for testing if $1 is set, > neither of them are uniformly better performance wise. In this case, > should [[ -v 1 ]] be supported?
So you're saying that neither of the existing options performs better than the other, though they both perform well, so we should add some new capability just because? That's a particularly poor argument. -- ``The lyf so short, the craft so long to lerne.'' - Chaucer ``Ars longa, vita brevis'' - Hippocrates Chet Ramey, UTech, CWRU c...@case.edu http://tiswww.cwru.edu/~chet/