2024-05-06 20:40:05 +00:00
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---
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2024-10-30 17:34:11 +00:00
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date: 2020-11-26
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2024-05-06 20:40:05 +00:00
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id: 411125af-adb2-4f21-b3bb-99ffdf74a447
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title: ephemeral
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---
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# Origin
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Greek ephemeros "lasting only a day".
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# Definition
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The opposite of persistant.
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# Examples
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## RAM
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- RAM is ephemeral whereas hard disk storage is persistant.
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## Data structures
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Data structures are ephemeral because properties can be mutated and
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there's no way to get back the original object
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``` javascript
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const dinner = {
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main: 'turkey',
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side: 'potatoes'
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}
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dinner.side = 'potatoes'
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console.log(dinner) // { main: 'turkey', side: 'potatoes' }
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```
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## Cloud computing
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- AWS Lambda
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- Google Cloud Functions
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