Define by default columnDefs - ag-grid

Question

I want to use by default all the datas from rowData, I do not want use specific values. Do you know how to unify columnDefs for both examples?
1st example:
columnDefs = [
{headerName: 'make', field: 'make' },
{headerName: 'model', field: 'model' },
{headerName: 'price', field: 'price'}
];
rowData = [
{ make: 'Toyota', model: 'Celica', price: 35000 },
{ make: 'Ford', model: 'Mondeo', price: 32000 },
{ make: 'Porsche', model: 'Boxter', price: 72000 }
];
2nd example:
columnDefs = [
{headerName: 'name', field: 'name' },
{headerName: 'phone', field: 'phone' },
];
rowData = [
{ name: 'Manuel', phone: 35000 },
{ name: 'Maria', phone: 32000 },
{ name: 'John', phone: 72000 }
];

Answer 1

I have one idea, but dont exactly know if it is more elegant.
var columnDefs = [
{ headerName: "make", field: "make" },
{ headerName: "model", field: "model" },
{ headerName: "price", field: "price" }
];
var rowData = [
{ make: "Toyota", model: "Celica", price: 35000 },
{ make: "Ford", model: "Mondeo", price: 32000 },
{ make: "Porsche", model: "Boxter", price: 72000 }
];
genColums() {
let columsDef = [];
for (var prop in rowData[0]) {
columsDef.push({
headerName: prop,
field: prop
});
}
console.log(columsDef);
}
this.genColums();
PS. this work, if all data same, in each object