mirror of
https://github.com/mongodb/mongo.git
synced 2024-12-01 09:32:32 +01:00
52 lines
1.1 KiB
JavaScript
52 lines
1.1 KiB
JavaScript
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t = db.mr_merge;
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t.drop();
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t.insert( { a : [ 1 , 2 ] } )
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t.insert( { a : [ 2 , 3 ] } )
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t.insert( { a : [ 3 , 4 ] } )
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outName = "mr_merge_out";
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out = db[outName];
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out.drop();
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m = function(){ for (i=0; i<this.a.length; i++ ) emit( this.a[i] , 1 ); }
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r = function(k,vs){ return Array.sum( vs ); }
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function tos( o ){
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var s = "";
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for ( var i=0; i<100; i++ ){
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if ( o[i] )
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s += i + "_" + o[i];
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}
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return s;
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}
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res = t.mapReduce( m , r , { out : outName } )
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expected = { "1" : 1 , "2" : 2 , "3" : 2 , "4" : 1 }
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assert.eq( tos( expected ) , tos( res.convertToSingleObject() ) , "A" );
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t.insert( { a : [ 4 , 5 ] } )
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out.insert( { _id : 10 , value : "5" } )
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res = t.mapReduce( m , r , { out : outName } )
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expected["4"]++;
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expected["5"] = 1
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assert.eq( tos( expected ) , tos( res.convertToSingleObject() ) , "B" );
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t.insert( { a : [ 5 , 6 ] } )
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out.insert( { _id : 10 , value : "5" } )
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res = t.mapReduce( m , r , { out : { merge : outName } } )
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expected["5"]++;
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expected["10"] = 5
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expected["6"] = 1
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assert.eq( tos( expected ) , tos( res.convertToSingleObject() ) , "C" );
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