Join array strings in a human readable way

strjoin.js

function strjoin(a) {
	if(a.length===0) return '';
	let r = a.shift();
	while(a.length>1) {
		r += ', '+a.shift();
	}
	if(a.length) {
		r += ' and '+a.shift();
	}
	return r;
}

/*
  'I like '+strjoin(['apples', 'bananas', 'cherries']);
  I like apple, bananas and cherries
  Demo: https://codepen.io/albinsoft/pen/jOJBxOJ?editors=0010
*/