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leopd/groupby.js

Forked from srleo/groupby.js
Created August 28, 2013 15:37
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groupby.js
count_by = function(collection,field) {
return collection.aggregate({
$group: {
_id: "$" + field,
count: { $sum: 1 }
}
})
}
 
count_by(db.vid10,'char');
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