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improved v3 merge docs

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Mike Farah 2022-08-29 10:22:32 +10:00
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upgrading-from-v3.md
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@ -118,12 +118,14 @@ yq 'del(.a.b.c)' sample.yaml
### Merging documents
Like `jq`, merge is done via the multiply operator. You will need to use the eval-all command to load all documents into memory at once, and then use the file operator to select the file nodes to merge.
Like `jq`, merge is done via the multiply operator.
```bash
yq eval-all 'select(fileIndex == 0) * select(filename == "file2.yaml")' file1.yaml file2.yaml
yq '. * load("file2.yaml")' file1.yaml
```
See the [multiply documentation](https://mikefarah.gitbook.io/yq/operators/multiply-merge) for more example and options.
### Prefix yaml
Use the [Create / Collect Into Object ](broken-reference)operator to create a new object with the desired prefix.