how to use the countby function from lodash in javascript

index.tsx
// First, install lodash: 
npm install lodash

// Then, import countBy and use it on an array or object:
const _ = require('lodash');

// Example 1: count how many times each letter appears in a string
const str = 'hello world';
const lettersCount = _.countBy(str);
console.log(lettersCount); // { h: 1, e: 1, l: 3, o: 2, ' ': 1, w: 1, r: 1, d: 1 }

// Example 2: count how many fruits of each type in an array of fruits
const fruits = ['apple', 'banana', 'orange', 'apple', 'banana', 'banana'];
const fruitsCount = _.countBy(fruits);
console.log(fruitsCount); // { apple: 2, banana: 3, orange: 1 }

// Example 3: count how many people have each age in an array of objects
const people = [
  { name: 'Alice', age: 25 },
  { name: 'Bob', age: 30 },
  { name: 'Charlie', age: 25 },
  { name: 'David', age: 30 },
  { name: 'Eve', age: 25 },
];
const ageCount = _.countBy(people, 'age');
console.log(ageCount); // { '25': 3, '30': 2 }
931 chars
27 lines