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;
}

@pi0, you solution throws an error, but thanks for inspiration for the most performant solution from provided here.

const getPropByPath = (object, path, defaultValue) => {
    const _path = Array.isArray(path)
        ? path
        : path.split('.');
    if (object && _path.length) return getPropByPath(object[_path.shift()], _path, defaultValue);
    return object === undefined ? defaultValue : object;
};

// without default value
const getPropByPath = (object, path) => {
    const _path = Array.isArray(path)
        ? path
        : path.split('.');
    if (object && _path.length) return getPropByPath(object[_path.shift()], _path);
    return object;
};

Benchmarks: https://jsbench.me/ogkwc7fxlg/1. I didn't include implementations out of scope of original lodash.get and those which iterate over whole path without break - i.e. reduce-based - they're too slow.

This solution fixed for me a problem: Empty string counts as undefined.
I'd like the empty string back. It's not the same (for me).

I'm talking about the version without default value.

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