From String Of Keys To Hash Value

I have a hash like the one below aa: { categories: { cat1: 'alpha' } } Starting from the string 'aa.categories.cat1', how can I get alpha suing plain JS?

Solution 1:

Using split() and reduce():

const result = path.split('.').reduce((a, v) => a[v], object);

---

Complete snippet:

const object = {
  aa: {
    categories: {
      cat1: 'alpha'
    }
  }
}

const path = 'aa.categories.cat1';

const result = path.split('.').reduce((a, v) => a[v], object);

console.log(result);

Solution 2:

You can use "Array.split" and "Array.reduce" to achieve this

var obj = {
  aa: {
    categories: {
      cat1: 'alpha'
    }
  }
}

functiongetValue(d) {
  return d.split('.').reduce((o, v) => o[v], obj) 
}

console.log(getValue('aa.categories.cat1'))