Ptt 大爆卦 | Js array get first - 前往 https://joshtronic.com/2020/07/19/how-to-get-the-first-and-last-item-from-an-array-in-mongodb/

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How to get the first and last item from an array in MongoDB

slice() in JavaScript, just with the MongoDB-centric syntax. The value of -1 says “start at the first item, and go backwards one” which in this ...

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