arangosh> col = db.example;
[ArangoCollection 73782, "example" (type document, status loaded)]
arangosh> col.save({ "Hello" : "World" });
{
"_id" : "example/73787",
"_key" : "73787",
"_rev" : "_ZXF6c5C--A"
}
arangosh> col.count();
1
arangosh> db._truncate(col);
arangosh> col.count();
0