github.com/anth0d/nomad@v0.0.0-20221214183521-ae3a0a2cad06/website/content/docs/job-specification/hcl2/functions/collection/keys.mdx (about)

     1  ---
     2  layout: docs
     3  page_title: keys - Functions - Configuration Language
     4  description: The keys function returns a list of the keys in a given map.
     5  ---
     6  
     7  # `keys` Function
     8  
     9  `keys` takes a map and returns a list containing the keys from that map.
    10  
    11  The keys are returned in lexicographical order, ensuring that the result will
    12  be identical as long as the keys in the map don't change.
    13  
    14  ## Examples
    15  
    16  ```shell-session
    17  > keys({a=1, c=2, d=3})
    18  [
    19    "a",
    20    "c",
    21    "d",
    22  ]
    23  ```
    24  
    25  ## Related Functions
    26  
    27  - [`values`](/docs/job-specification/hcl2/functions/collection/values) returns a list of the _values_ from a map.