Simple lodash.get function in javascript

lodash.get.js

/* Implementation of lodash.get function */
function getProp( object, keys, defaultVal ){
  keys = Array.isArray( keys )? keys : keys.split('.');
  object = object[keys[0]];
  if( object && keys.length>1 ){
    return getProp( object, keys.slice(1) );
  }
  return object === undefined? defaultVal : object;
}

/* Implementation of lodash.set function */
function setProp( object, keys, val ){
  keys = Array.isArray( keys )? keys : keys.split('.');
  if( keys.length>1 ){
    object[keys[0]] = object[keys[0]] || {};
    return setProp( object[keys[0]], keys.slice(1), val );
  }
  object[keys[0]] = val;
}

setProp is not work.

I created a fork of this version that includes tests, handles falsey values (including undefined), and handles objects-inside-arrays (i.e. '[0].id') as well as arrays-inside-objects (i.e. 'a.b[0].c'):

https://gist.github.com/andrewchilds/30a7fb18981d413260c7a36428ed13da

many thanks