47 lines
1.2 KiB
Markdown
47 lines
1.2 KiB
Markdown
---
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layout: "functions"
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page_title: "merge - Functions - Configuration Language"
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sidebar_current: "docs-funcs-collection-merge"
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description: |-
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The merge function takes an arbitrary number maps or objects, and returns a
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single map or object that contains a merged set of elements from all
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arguments.
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---
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# `merge` Function
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-> **Note:** This page is about Terraform 0.12 and later. For Terraform 0.11 and
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earlier, see
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[0.11 Configuration Language: Interpolation Syntax](../../configuration-0-11/interpolation.html).
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`merge` takes an arbitrary number of maps or objects, and returns a single map
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or object that contains a merged set of elements from all arguments.
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If more than one given map or object defines the same key or attribute, then
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the one that is later in the argument sequence takes precedence. If the
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argument types do not match, the resulting type will be an object matching the
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type structure of the attributes after the merging rules have been applied.
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## Examples
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```
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> merge({a="b", c="d"}, {e="f", c="z"})
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{
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"a" = "b"
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"c" = "z"
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"e" = "f"
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}
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```
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```
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> merge({a="b"}, {a=[1,2], c="z"}, {d=3})
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{
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"a" = [
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1,
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2,
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]
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"c" = "z"
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"d" = 3
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}
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```
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