27 lines
745 B
JavaScript
27 lines
745 B
JavaScript
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normal = "mr_outreduce2"
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out = normal + "_out"
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t = db[normal]
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t.drop();
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db[out].drop()
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t.insert( { _id : 1 , x : 1 } )
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t.insert( { _id : 2 , x : 1 } )
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t.insert( { _id : 3 , x : 2 } )
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m = function(){ emit( this.x , 1 ); }
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r = function(k,v){ return Array.sum( v ); }
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res = t.mapReduce( m , r , { out : { reduce : out } , query : { _id : { $gt : 0 } } } )
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assert.eq( 2 , db[out].findOne( { _id : 1 } ).value , "A1" )
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assert.eq( 1 , db[out].findOne( { _id : 2 } ).value , "A2" )
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t.insert( { _id : 4 , x : 2 } )
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res = t.mapReduce( m , r , { out : { reduce : out } , query : { _id : { $gt : 3 } } , finalize : null } )
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assert.eq( 2 , db[out].findOne( { _id : 1 } ).value , "B1" )
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assert.eq( 2 , db[out].findOne( { _id : 2 } ).value , "B2" )
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