Nothing
list2arr0 <-
function(network){
lvec<-unlist(lapply(network,length))
net<-matrix(0,sum(lvec),2)
net[,1]<-rep(names(network),lvec)
net[,2]<-unlist(network)
links= paste(net[,1], net[,2], sep=' ')
ulinks= unique(links)
return(ulinks)
}
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