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That's it for this module,

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again we learned quite a lot,

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we had a detailed look at update one and update many. Update one and many can be used to update

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guess what,

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one or more documents in a collection.

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As a first argument, these methods take a filter, a query selector which narrows down which document or

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documents to update

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and then in the second argument, you can describe the update with the help of update operators, like

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$set.

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Now I didn't dive into it in this module but I covered it earlier in this course,

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there also is the option to entirely replace a document with the old update method, so not update one

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or many but just update or with replace one,

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so if you have a use case where you need to replace the entire document and just keep its ID, you can

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do that too.

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Now back to the update operators though, you learned about a lot of different update operators for updating

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the fields, with $set, inc, min and so on.

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Now if you work with arrays, you should definitely take advantage of the different shortcuts like $,

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$[] or dollar with the identifier and then the array filters key or configuration

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you add to the third argument of update many or update one, where you could also add upsert and so

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on.

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So this is something you should keep in mind

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and of course use the array update operators like $push or $pop. This allow you

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to efficiently add or remove elements to or from arrays.