function _unflatten()

in src/lib/helper.js [196:217]

• 22 lines of code
• 5 McCabe index (conditional complexity)

function _unflatten(obj, sep = '.') {
  let output = {};
  Object.keys(obj).forEach(key => {
    if (key.indexOf(sep) !== -1) {
      const keyArr = key.split('.').filter(item => item !== '');
      let currObj = output;
      keyArr.forEach((k, i) => {
        if (typeof currObj[k] === 'undefined') {
          if (i === keyArr.length - 1) {
            currObj[k] = obj[key];
          } else {
            currObj[k] = isNaN(keyArr[i + 1]) ? {} : [];
          }
        }
        currObj = currObj[k];
      });
    } else {
      output[key] = obj[key];
    }
  });
  return output;
}