zkytony

# Some important aliases
SAFE_RM_DIR=${SAFE_RM_DIR:="$HOME/.safe_rm"}
REAL_RM=${REAL_RM:="/bin/rm"}

# Override rm, because it's always painful to recover
# files deleted by rm, if possible at all. Instead,
# simply move it to the $SAFE_RM_DIR for later cleaning.
rm()
{
    force=false

zkytony

/**
 * Returns a set of Strings which represent vertices' data at the k-th level from
 * the vertex with given data "start". The level is 0 at the given vertex. The level
 * increments by 1 when traversal goes one level deeper. For example, consider a graph
 * where A has children {B,C}, B has children {D}, C has children {A}. Then when this
 * method is called as kthLevelChildren("A", 2), the resulting set would contain
 * {A, D}, since these vertices are 2 levels starting from "A".
 * 
 * Note: the purpose of this method is more for testing, in the context of homework 6.
 *