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balthazar/star-group-day.js

Created November 16, 2017 16:25
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star-group-day.js
const dates = stars.map(o => new Date(o.starredAt))
const grouped = _.groupBy(dates, d => format(d, 'YYYY/MM/DD'))
const byDay = Object.keys(grouped).reduce((acc, date, i) => {
const count = grouped[date].length
return acc.concat({ date, stars: count, total: i === 0 ? count : count + acc[i - 1].total })
}, [])
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