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mongodb/jstests/remove3.js

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t = db.remove3;
t.drop();
for ( i=1; i<=8; i++){
t.save( { _id : i , x : i } );
}
assert.eq( 8 , t.count() , "A" );
t.remove( { x : { $lt : 5 } } );
assert.eq( 4 , t.count() , "B" );
t.remove( { _id : 5 } );
assert.eq( 3 , t.count() , "C" );
t.remove( { _id : { $lt : 8 } } , "D" );
assert.eq( 1 , t.count() , "D" );