Litlle function for concatenating file names in gulp

gulpdir

//little util to do tidier directory concatenation
function dir() {
	var args = Array.prototype.slice.call(arguments);
	var prefix = "";
	if(args[0] === "!") {
		prefix = args[0];
		args.shift();
	}
	return prefix + args.join("/");
}
 
//usage
var dirs = {
	js: "./src"
};
gulp.src(dir(dirs.js, '**/*.js'));
gulp.src(dir("!", dirs.js, '**/*.js'));