How to remove item if exist before and add current as new ?

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Javascript

Typescript

Angular7

I need when add statusdate exist before on collectfulldata then remove exist and and add new one

and if not exist add it .

meaning i dont need two statusdata with same name exist two time .

and if statusdata not exist add it .


current result

full data is Text5='Lifecycle',Text6='Package',Text7='Parametric'

Expected result

if add Text8='car' to collectfulldata add it because not exist
if add Text6='OBS' add it but remove exist as Text6='Package'

What I have tried:

initcollectdropdowslist=[]; 
collectfulldata:string; 
let textdata=$event.target.options[$event.target.options.selectedIndex].text; 
let statusdata:any = this.FilterBinddata.filter(s=>s.reportSource==textdata)[0].reportSource2; 
this.collectfulldata= statusdata + "=" + "'" + textdata + "'"; 
this.initcollectdropdowslist.push(this.collectfulldata); 
console.log("full data is " + this.initcollectdropdowslist)