EExcel 丞燕快速查詢2

EExcel 丞燕快速查詢2
EExcel 丞燕快速查詢2 https://sandk.ffbizs.com/

angularfire2 subscribe once

https://github.com/angular/angularfire2/issues/380


subscription.unsubscribe();


Observable.interval + take(1)