React Native - prepare SectionList's array with lodash

SectionList.js

// maps it's an array of objects
// groupBy to extract section headers
let dataSource = _.groupBy(maps, o => o.name);
// reduce to generate new array
dataSource = _.reduce(dataSource, (acc, next, index) => {
  acc.push({
    key: index,
    data: next
  });
  return acc;
}, []);

return dataSource;

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