mongodb - how to display multi-dimensional data from collection in meteor -

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how show multidimensional data collection. have this

links.insert({ cat:[{     name:'js',     sub:[{         name:'angularjs',         links:[{             url:'something.com'},{url:'another.com'}]         },{         name:'meteorjs',         links:[{             url:'something.com'},{url:'another.com'}]         }]     }] });

retrieving data in helper this

'links':function(){     return links.find();  // tried links.find().fetch()

one option use separate helpers specific data. want use single helper receive whole data , show like

{{‪#‎each‬ links}}     {{cat.name}} : {{sub.name}} : {{links.url}} {{/each}}

have tried:

{{#each link}}     {{cat.[0].name}}  :  {{cat.[0].sub.[0].name}}  :  {{cat.[0].sub.[0].links.[0].url}} {{/each}}

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