Function format

src/utils/strings.js:8–16

()

}

export function format() {
  let args = [].slice.call(arguments),
      str = args.shift();
  return str.replace(/{(\d+)}/g, function(match, number) {
    return args[number] !== undefined
      ? args[number]
      : match;
  });
}

export function substitute(str, obj) {
  if (typeof str === 'string') {