Transform nested object to keys-values

nested-object-to-keys-values.ts

function objectToMap(obj: any, key: string[] = [], mapResult?: Map<string, any>) {
  if (typeof mapResult === 'undefined') {
    mapResult = new Map<string, any>();
  }
  if (typeof obj === 'object' && obj !== null && !Array.isArray(obj)) {
    const k = Object.keys(obj);
    for (let i = 0; i < k.length; i += 1) {
      if (typeof obj[k[i]] !== 'object') {
        mapResult.set(key.concat([k[i]]).join('.'), obj[k[i]]);
      } else if (obj[k[i]] !== null) {
        key.push(k[i]);
        objectToMap(obj[k[i]], [...key], mapResult);
        key.pop();
      }
    }
  }
  return mapResult;
}