ayyylmao.js

  service.expand = function(input) {
    let output = [];
    let tempArray = input.slice();

    tempArray.forEach((data, index) => {
    	if(data.length > 0) {
    		output.push.apply(output, data);
    	} else {
    		output.push(data);
    	}
    });

    return output;
  }