How to prevent totalCount Column from display ?

Question

How to prevent totalCount Column from display on header and content on angular 7 ?

 

header col below is dynamic contain  columns of headers as id ,name,totalCount

 

content body below is dynamic  contain rows data for id and Name and totalCount

 

I need to prevent column totalCount from display  on headercol and contentbody

 

so how to do that please  

 

 

this.headerCols = Object.keys(data2[0]);
     console.log("header col" + this.headerCols);
     data2.forEach((item) =>{
       let values = Object.keys(item).map((key)=> item[key]);
       this.contentBody.push(values);
       console.log("contenet " + JSON.stringify( this.contentBody));