# Array to Map

Use this operator to convert an array to..a map. Skips over null values.

Behind the scenes, this is implemented using reduce:

```
(.[] | select(. != null) ) as $i ireduce({}; .[$i | key] = $i)
```

## Simple example
Given a sample.yml file of:
```yaml
cool:
  - null
  - null
  - hello
```
then
```bash
yq '.cool |= array_to_map' sample.yml
```
will output
```yaml
cool:
  2: hello
```