更短的函数 varmaterials=['Hydrogen','Helium','Lithium','Beryllium'];materials.map(function(material){returnmaterial.length
3-1'},{id:8,label:'二级3-2',children:[{id:11,label:'三级3-2-1'},{id:12,label:'三级3-2-2'},{id:13,label:'三级3-
MaterialstringCountuint}sweaters:=Inventory{"wool",17}tmpl,err:=template.New("test").Parse("{{.Count}}itemsaremadeof{{.Material