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document how to add anchors/alias to array

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Peter Romfeld 2023-07-20 21:06:54 +08:00
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operators/anchor-and-alias-operators.md
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@ -331,3 +331,48 @@ thingTwo:
!!merge <<: *item_value
```
## Add Anchor to array
Given a sample.yml file of:
```yaml
anchorList:
- &one first
- &two second
```
then
```bash
yq '.anchorList += "third" | (.anchorList[-1] anchor="three")' sample.yml
```
will output
```yaml
anchorList:
- &one first
- &two second
- &three third
```
## Add Alias to array
Given a sample.yml file of:
```yaml
anchorList:
- &one first
- &two second
- &three third
anchorRefList:
- *one
- *two
```
then
```bash
yq '.anchorRefList += "TMP" | (.anchorRefList[-1] anchor="three")' sample.yml
```
will output
```yaml
anchorList:
- &one first
- &two second
- &three third
anchorRefList:
- *one
- *two
- *three
```