Building-Strings-From-a-Hash.js

/*
  Complete the solution so that it takes the object (JavaScript/CoffeeScript) or hash (ruby) passed in and generates a human readable string from its key/value pairs.

  The format should be "KEY = VALUE". Each key/value pair should be separated by a comma except for the last pair.

  Example:

  solution({a: 1, b: '2'}) // should return "a = 1,b = 2"
*/

// Answer:

function solution(pairs) {
  return Object.entries(pairs)
    .map(([key, value]) => `${key} = ${value}`)
    .join(",");
}

// BigO: O(n)