文章列表
db.runCommand({ mapreduce: "demo",
map : function Map() {
var result={short:0,long:0};
if(this.short){
result.short=this.short;
}
if(this.long){
result.long=this.long;
}
emit(
this.name,result
);
},
reduce : function Reduce(key, values) {
var result={long:0,short:0};
for ...