updeep-remeda/lib/updateIn.js

import curry from './util/curry';
import update from './update';
import map from './map';
import splitPath from './util/splitPath';

const wildcard = '*';

function reducePath(acc, key) {
  if (key === wildcard) {
    return value =>
      Object.prototype.hasOwnProperty.call(value, wildcard) ?
        // If we actually have wildcard as a property, update that
        update({ [wildcard]: acc }, value) :
        // Otherwise map over all properties
        map(acc, value);
  }

  return { [key]: acc };
}

function updateIn(path, value, object) {
  const parts = splitPath(path);
  const updates = parts.reduceRight(reducePath, value);

  return update(updates, object);
}

export default curry(updateIn);