slice rows that have o3 in javascript

Assuming you have an array of rows and each row contains an element called o3, you can use the filter method of an array in JavaScript to extract only the rows that contain o3. Here's an example code snippet that demonstrates this:

index.tsx
let rows = [
  { o2: 1, o3: 2 },
  { o2: 2, o3: 3 },
  { o2: 3, o3: 4 },
  { o2: 4, o3: 5 },
];

let filteredRows = rows.filter(row => row.o3 !== undefined); // extract the rows that have 'o3'

console.log(filteredRows);
// Output: 
// [
//   { o2: 1, o3: 2 },
//   { o2: 2, o3: 3 },
//   { o2: 3, o3: 4 },
//   { o2: 4, o3: 5 }
// ]
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In this example, filteredRows will contain only those rows that have the o3 element. If any row does not have the o3 element, it will be excluded from the filteredRows.