dist/hello.all.js
function(a, b) {
		if (a || !b) {
			var r = {};
			for (var x in a) {
				// Does the property not exist?
				if (!(x in b)) {
					r[x] = a[x];
				}
			}

			return r;
		}

		return a;
	}
function(a, b) {
		if (a || !b) {
			var r = {};
			for (var x in a) {
				// Does the property not exist?
				if (!(x in b)) {
					r[x] = a[x];
				}
			}

			return r;
		}

		return a;
	}
function ( a , b ) { if ( a || ! b ) { var r = { } ; for ( var x in a ) { // Does the property not exist? if ( ! ( x in b ) ) { r [ x ] = a [ x ] ; } } return r ; } return a ; }
Get the different hash of properties unique to `a`, and not in `b`
Get the different hash of properties unique to a and not in b