Reduce example #4

reduce4.js

const arr = [["dog", 1], ["cat", 2], ["bear", 3]];
const func1 = ([key, v1]) => ({ [key]: v1 }); // creates an object out of the array
const func2 = (obj, prop) => Object.assign(obj, prop); // assigns each object to an accumulator object
const obj3 = arr.map(func1).reduce(func2); // nesting
console.log(JSON.stringify(obj3, null, 2)); // Prints {  "dog": 1,  "cat": 2,  "bear": 3  }