algorithm for counting the names and datatypes of properties of a set of (hopefully) similarly-shaped object

item-property-tallies.js

// before running this, define ITEMS as an array of objects whose props you wish to examine

items.reduce((tallies, asset) => {
	Object
	.keys(asset)
	.forEach((prop) => {
		
		if(tallies.hasOwnProperty(`${prop} (${typeof asset[prop]})`)) {
			console.log(`has ${prop} (${typeof asset[prop]})`);
			tallies[`${prop} (${typeof asset[prop]})`] += 1;
		} else {
			console.log(`no has ${prop} (${typeof asset[prop]})`);
			tallies[`${prop} (${typeof asset[prop]})`] = 1;
		}
		
	});
	
	return tallies;
}, {});