54 lines
1.1 KiB
Markdown
54 lines
1.1 KiB
Markdown
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---
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layout: "functions"
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page_title: "toset - Functions - Configuration Language"
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sidebar_current: "docs-funcs-conversion-toset"
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description: |-
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The toset function converts a value to a set.
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---
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# `toset` Function
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`toset` converts its argument to a set value.
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Explicit type conversions are rarely necessary in Terraform because it will
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convert types automatically where required. Use the explicit type conversion
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functions only to normalize types returned in module outputs.
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Pass a _list_ value to `toset` to convert it to a set, which will remove any
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duplicate elements and discard the ordering of the elements.
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## Examples
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```
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> toset(["a", "b", "c"])
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[
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"a",
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"b",
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"c",
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]
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```
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Since Terraform's concept of a set requires all of the elements to be of the
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same type, mixed-typed elements will be converted to the most general type:
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```
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> tolist(["a", "b", 3])
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[
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"a",
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"b",
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"3",
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]
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```
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Set collections are unordered and cannot contain duplicate values, so the
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ordering of the argument elements is lost and any duplicate values are
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coalesced:
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```
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> tolist(["c", "b", "b"])
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[
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"b",
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"c",
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]
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```
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