Adding helper function into index_util
Adding helper function into index_util

vittvolt/15721-peloton,haojin2/peloton,PauloAmora/peloton,AllisonWang/peloton,haojin2/peloton,jessesleeping/iso_peloton,yingjunwu/peloton,vittvolt/peloton,vittvolt/15721-peloton,malin1993ml/peloton,cmu-db/peloton,prashasthip/peloton,eric-haibin-lin/peloton-1,haojin2/peloton,jessesleeping/iso_peloton,haojin2/peloton,seojungmin/peloton,PauloAmora/peloton,seojungmin/peloton,yingjunwu/peloton,malin1993ml/peloton,eric-haibin-lin/peloton-1,wangziqi2016/peloton,apavlo/peloton,AllisonWang/peloton,vittvolt/15721-peloton,wangziqi2016/peloton,haojin2/peloton,prashasthip/peloton,AngLi-Leon/peloton,AngLi-Leon/peloton,PauloAmora/peloton,phisiart/peloton-p3,vittvolt/15721-peloton,wangziqi2016/peloton,AllisonWang/peloton,phisiart/peloton-p3,phisiart/peloton-p3,yingjunwu/peloton,PauloAmora/peloton,yingjunwu/peloton,ShuxinLin/peloton,AllisonWang/peloton,wangziqi2016/peloton,seojungmin/peloton,wangziqi2016/peloton,jessesleeping/iso_peloton,AngLi-Leon/peloton,cmu-db/peloton,seojungmin/peloton,cmu-db/peloton,ShuxinLin/peloton,vittvolt/peloton,ShuxinLin/peloton,apavlo/peloton,apavlo/peloton,cmu-db/peloton,eric-haibin-lin/peloton-1,malin1993ml/peloton,ShuxinLin/peloton,prashasthip/peloton,jessesleeping/iso_peloton,phisiart/peloton-p3,jessesleeping/iso_peloton,eric-haibin-lin/peloton-1,prashasthip/peloton,jessesleeping/iso_peloton,eric-haibin-lin/peloton-1,seojungmin/peloton,vittvolt/peloton,wangziqi2016/peloton,cmu-db/peloton,vittvolt/15721-peloton,eric-haibin-lin/peloton-1,prashasthip/peloton,PauloAmora/peloton,ShuxinLin/peloton,AngLi-Leon/peloton,apavlo/peloton,vittvolt/peloton,PauloAmora/peloton,ShuxinLin/peloton,AllisonWang/peloton,malin1993ml/peloton,malin1993ml/peloton,yingjunwu/peloton,yingjunwu/peloton,AllisonWang/peloton,vittvolt/peloton,jessesleeping/iso_peloton,malin1993ml/peloton,phisiart/peloton-p3,AngLi-Leon/peloton,haojin2/peloton,cmu-db/peloton,prashasthip/peloton,apavlo/peloton,apavlo/peloton,phisiart/peloton-p3,vittvolt/15721-peloton,seojungmin/peloton,vittvolt/peloton,AngLi-Leon/peloton