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elvio/interactions_map_reduce.js

Created August 11, 2014 14:37
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Simple Mongo map-reduce
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interactions_map_reduce.js
var mapFunction = function() {
emit(this.facebook_object_id, 1);
};
var reduceFunction = function(key, values) {
return Array.sum(values);
};
var options = {
out: {inline: 1},
};
function compare(v1, v2) {
if (v1.value < v2.value) {
return -1;
} else if (v1.value > v2.value) {
return 1;
} else {
return 0;
}
}
var results = db.interactions.mapReduce(mapFunction, reduceFunction, options).results;
var sorted = results.sort(compare).reverse().splice(0, 25);
@gobert
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gobert commented Aug 11, 2014

db ||= Mongo::Connection.new("localhost", 27017).db("taste_profiler_production")

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