js-path

path-example.js

function path(paths, obj) {
	let val = obj;
	let idx = 0;
	while (idx < paths.length) {
		if ( null == val ) {
			return;
		}
		val = val[ paths[ idx ] ];
		idx += 1;
	}
	return val;
}

let x = {
  a: { b:
      { c: [ { x: 'sagar'}, {} ] }
     } 
};

let y = path( ['a','b','c',0,'x' ], x );
console.log( y );