const colheaders = Object.keys(rows[0]);
const errors=[];
const regexpArray=[];
rows.forEach((row,rowindex)=>{
    errors[rowindex]=[];
    Object.values(row).forEach((val,colindex)=>{
        if(regexpArray[colindex] && regexpArray[colindex].test(val)){
            errors[rowindex].push(colheaders[colindex]);
        }
    })
})