yq/pkg/yqlib/doc/operators/line.md

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2022-02-27 00:56:46 +00:00
# Line
Returns the line of the matching node. Starts from 1, 0 indicates there was no line data.
## Returns line of _value_ node
Given a sample.yml file of:
```yaml
a: cat
b:
c: cat
```
then
```bash
yq '.b | line' sample.yml
```
will output
```yaml
3
```
## Returns line of _key_ node
Pipe through the key operator to get the line of the key
Given a sample.yml file of:
```yaml
a: cat
b:
c: cat
```
then
```bash
yq '.b | key| line' sample.yml
```
will output
```yaml
2
```
## First line is 1
Given a sample.yml file of:
```yaml
a: cat
```
then
```bash
yq '.a | line' sample.yml
```
will output
```yaml
1
```
## No line data is 0
Running
```bash
yq --null-input '{"a": "new entry"} | line'
```
will output
```yaml
0
```