yq/pkg/yqlib/doc/Pipe.md

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Pipe the results of an expression into another. Like the bash operator.
## Simple Pipe
Given a sample.yml file of:
```yaml
a:
b: cat
```
then
```bash
yq eval '.a | .b' sample.yml
```
will output
```yaml
cat
```
## Multiple updates
Given a sample.yml file of:
```yaml
a: cow
b: sheep
c: same
```
then
```bash
yq eval '.a = "cat" | .b = "dog"' sample.yml
```
will output
```yaml
a: cat
b: dog
c: same
```