96 lines
1.8 KiB
Markdown
96 lines
1.8 KiB
Markdown
---
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title: array.concat() function
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description: >
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`array.concat()` appends two arrays and returns a new array.
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menu:
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flux_v0_ref:
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name: array.concat
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parent: array
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identifier: array/concat
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weight: 101
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introduced: 0.173.0
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---
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<!------------------------------------------------------------------------------
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IMPORTANT: This page was generated from comments in the Flux source code. Any
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edits made directly to this page will be overwritten the next time the
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documentation is generated.
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To make updates to this documentation, update the function comments above the
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function definition in the Flux source code:
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https://github.com/influxdata/flux/blob/master/stdlib/array/array.flux#L76-L76
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Contributing to Flux: https://github.com/influxdata/flux#contributing
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Fluxdoc syntax: https://github.com/influxdata/flux/blob/master/docs/fluxdoc.md
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------------------------------------------------------------------------------->
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`array.concat()` appends two arrays and returns a new array.
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Neither input array is mutated and a new array is returned.
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##### Function type signature
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```js
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(<-arr: [A], v: [A]) => [A]
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```
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{{% caption %}}
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For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
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{{% /caption %}}
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## Parameters
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### arr
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First array. Default is the piped-forward array (`<-`).
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### v
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({{< req >}})
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Array to append to the first array.
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## Examples
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### Merge two arrays
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```js
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import "array"
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a = [1, 2, 3]
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b = [4, 5, 6]
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c = a |> array.concat(v: b)
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// Returns [1, 2, 3, 4, 5, 6]
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// Output each value in the array as a row in a table
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array.from(rows: c |> array.map(fn: (x) => ({_value: x})))
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```
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{{< expand-wrapper >}}
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{{% expand "View example output" %}}
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#### Output data
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| _value |
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| ------- |
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| 1 |
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| 2 |
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| 3 |
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| 4 |
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| 5 |
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| 6 |
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{{% /expand %}}
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{{< /expand-wrapper >}}
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