swoleengineer

const isFlat = array => {
  if (!array) return true;
  for (let i = 0; i < array.length; i++) {
    if (array[i] instanceof Array) return false;
  }
  return true;
}

const makeFlat = arr => {
  while (!isFlat(arr)) arr = arr.reduce((a,b) => a.concat(b), []);

swoleengineer

app.filter('metric', function(authToken){
	return function(input, type, inch) {
		var isMetric = authToken.getMetric();
		if(isMetric) {
			if(type == 'cm') {
				if(isNaN(input)) {
					return 'cm.';
				} else {
					if(inch) {
						return ((((input * 12) * 1) + (inch * 1)) * 2.54).toFixed(2) + ' cm.';