JS: Convert Object of Arrays to Array of Objects

converter.js

/**
 * Converts an Object of Arrays to an Array of Objects
 * @param {Object} object_arrays An object of arrays where each array is of the same length
 * @returns {Array<Object>} An Array of objects where each key in each object corresponds to that element in the original array
 */
function obj_arraysTOarray_objs(object_arrays){
let final_array = object_arrays[Object.keys(object_arrays)[0]].map(
	// el is unused, but needs to be defined for map to give access to index i
	(_el, i) => {
		let internal_object = {};
		Object.keys(object_arrays).forEach(
			key => (internal_object[key] = object_arrays[key][i])
		);
		return internal_object;
	}
);
	return final_array;
}

// ----- Example -------

// You have an object of arrays
let original_object = {
 foo: ["el1", "el2", "el3"],
 bar: ["diff_el1", "diff_el2", "diff_el3"]
}
// But would like to get an equivalent array of objects
let new_format = obj_arraysTOarray_objs(original_object)
// like this
console.log(new_format)
// what is printed to console
// [
//   {
//     foo: "el1",
//     bar: "diff_el1"
//   },
//   {
//     foo: "el2",
//     bar: "diff_el2"
//   },
//   {
//     foo: "el3",
//     bar: "diff_el3"
//   }
// ]

// As long as the arrays in `original_object` are of the same length, and you're happy keeping the key names. 
// Can easily be extended.

Great!!! Grazie mille

Just what I needed. Thank you! 💯