terraform/website/docs/configuration/functions/transpose.html.md

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---
layout: "language"
page_title: "transpose - Functions - Configuration Language"
sidebar_current: "docs-funcs-collection-transpose"
description: |-
The transpose function takes a map of lists of strings and swaps the keys
and values.
---
# `transpose` Function
-> **Note:** This page is about Terraform 0.12 and later. For Terraform 0.11 and
earlier, see
[0.11 Configuration Language: Interpolation Syntax](../../configuration-0-11/interpolation.html).
`transpose` takes a map of lists of strings and swaps the keys and values
to produce a new map of lists of strings.
## Examples
```
> transpose({"a" = ["1", "2"], "b" = ["2", "3"]})
{
"1" = [
"a",
],
"2" = [
"a",
"b",
],
"3" = [
"b",
],
}
```