43 lines
780 B
Plaintext
43 lines
780 B
Plaintext
---
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page_title: coalescelist - Functions - Configuration Language
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description: |-
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The coalescelist function takes any number of list arguments and returns the
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first one that isn't empty.
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---
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# `coalescelist` Function
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`coalescelist` takes any number of list arguments and returns the first one
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that isn't empty.
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## Examples
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```
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> coalescelist(["a", "b"], ["c", "d"])
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[
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"a",
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"b",
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]
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> coalescelist([], ["c", "d"])
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[
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"c",
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"d",
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]
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```
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To perform the `coalescelist` operation with a list of lists, use the `...`
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symbol to expand the outer list as arguments:
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```
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> coalescelist([[], ["c", "d"]]...)
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[
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"c",
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"d",
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]
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```
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## Related Functions
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* [`coalesce`](/language/functions/coalesce) performs a similar operation with string
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arguments rather than list arguments.
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