Purpose: Definition and discussion of set functionality, especially the function to check a set for emptiness. Back to the [Chart of proposed set functionality]. ---- : '''::setops::empty''' ''set'' ---- Arguments: * Exactly one argument. * The argument represents the set to check. * The set is given by value, as tcl-list. Result: * A boolean value. 0 = set is not empty, 1 = set is empty ---- Implementation: ====== proc ::setops::empty {set} { expr {[llength $set] == 0} } ====== ---- -- AK <>Data Structure