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danielmcq/mongoIdToCreatedAt.js

Last active August 31, 2017 22:06
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Convert mongo document ID to date
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mongoIdToCreatedAt.js
function mongoIdToCreatedAt (mongoId) {
const datePart = mongoId.slice(0,8)
const dateVal = parseInt(datePart,16)
return new Date(dateVal*1000)
}
// One line
const mongoIdToCreatedAt = mongoId=>(new Date(parseInt(mongoId.slice(0,8),16)*1000))
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