Iām having trouble grasping basic usage of filtering based on v->f(v), MWE:
g = MetaDiGraph(3)
set_props!(g,1,Dict(:a=>"a",:b=>1))
set_props!(g,2,Dict(:š°=>1))
set_props!(g,3,Dict(:š°=>1,:a=>"a"))
#sanity check
@test collect(filter_vertices(g,:š°,1)) ==
[2,3]
passed
# fn filters
@test collect(filter_vertices(g,v->haskey(props(g,v),:š°) ) ) ==
[2,3]
error
@test collect(filter_vertices(g,v->haskey(props(g,v),:š°)&&haskey(props(g,v),:a) ) ) ==
[3]
error