yq/operators/reverse.md

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2022-02-27 01:10:01 +00:00
# Reverse
Reverses the order of the items in an array
{% hint style="warning" %}
Note that versions prior to 4.18 require the 'eval/e' command to be specified. 
`yq e <exp> <file>`
{% endhint %}
## Reverse
Given a sample.yml file of:
```yaml
- 1
- 2
- 3
```
then
```bash
yq 'reverse' sample.yml
```
will output
```yaml
- 3
- 2
- 1
```
## Sort descending by string field
Use sort with reverse to sort in descending order.
Given a sample.yml file of:
```yaml
- a: banana
- a: cat
- a: apple
```
then
```bash
yq 'sort_by(.a) | reverse' sample.yml
```
will output
```yaml
- a: cat
- a: banana
- a: apple
```