> For the complete documentation index, see [llms.txt](https://boxlang.ortusbooks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/list/listinsertat.md).

# ListInsertAt

Filters a delimted list and returns the values from the callback test

## Method Signature

```
ListInsertAt(list=[string], position=[integer], value=[string], delimiter=[string], includeEmptyFields=[boolean], multiCharacterDelimiter=[boolean])
```

### Arguments

| Argument                  | Type      | Required | Description                                                    | Default |
| ------------------------- | --------- | -------- | -------------------------------------------------------------- | ------- |
| `list`                    | `string`  | `true`   | string list to filter entries from                             |         |
| `position`                | `integer` | `true`   |                                                                |         |
| `value`                   | `string`  | `true`   |                                                                |         |
| `delimiter`               | `string`  | `false`  | string the list delimiter                                      | `,`     |
| `includeEmptyFields`      | `boolean` | `false`  | boolean whether to include empty fields in the returned result | `false` |
| `multiCharacterDelimiter` | `boolean` | `false`  | boolean whether the delimiter is multi-character               | `false` |

## Examples

### Simple Example

Inserts 'foo' into the list at position 2

[Run Example](https://try.boxlang.io/?code=eJzLySwu8cwrTi0qcSzRUFBKSizSyckvSs3VySwoLs1V0lEw0lFQSsvPV1LQtOYCAGxYDi0%3D)

```java
listInsertAt( "bar,lorem,ipsum", 2, "foo" );

```

Result: bar,foo,lorem,ipsum

### Example with Custom Delimiter

Inserts 'foo' into the list with a custom delimiter

[Run Example](https://try.boxlang.io/?code=eJzLySwu8cwrTi0qcSzRUFBKSiyqyckvSs3VySwoLs2tyU2tKc7PTS3JyMxLV9JRMNJRUErLzweylGqUFDStuQDughUh)

```java
listInsertAt( "bar|lorem,ipsum|me|something", 2, "foo", "|" );

```

Result: bar|foo|lorem,ipsum|me|something

### Additional Examples

[Run Example](https://try.boxlang.io/?code=eJxVzcEKwjAQhOF7nmLYUwvBIh6LEEEEQfEZTLpgoE1LsiGv7wq9eBwG%2Fq%2FlKPyqslXpMMci91Q4y0UXva31NliyOFrQmpjQox%2FNMODJi%2BeMW01B4prQonzgMPEcFw1mUyQ%2FtIazZpx3E42m%2FahrXbYO%2B3v4B0%2BqBNXI7dAXidwwnQ%3D%3D)

```java
writeOutput( listInsertAt( "a,,b,c,", 1, "one" ) );
// Member Function with @ delimiter
strList = "a@b@d";
writeDump( strList.listInsertAt( 3, "c", "@" ) );

```

## Related

* [GetToken](/boxlang-language/reference/built-in-functions/list/gettoken.md)
* [ListAppend](/boxlang-language/reference/built-in-functions/list/listappend.md)
* [ListAvg](/boxlang-language/reference/built-in-functions/list/listavg.md)
* [ListChangeDelims](/boxlang-language/reference/built-in-functions/list/listchangedelims.md)
* [ListCompact](/boxlang-language/reference/built-in-functions/list/listcompact.md)
* [ListContains](/boxlang-language/reference/built-in-functions/list/listcontains.md)
* [ListContainsNoCase](/boxlang-language/reference/built-in-functions/list/listcontainsnocase.md)
* [ListDeleteAt](/boxlang-language/reference/built-in-functions/list/listdeleteat.md)
* [ListEach](/boxlang-language/reference/built-in-functions/list/listeach.md)
* [ListEvery](/boxlang-language/reference/built-in-functions/list/listevery.md)
* [ListFilter](/boxlang-language/reference/built-in-functions/list/listfilter.md)
* [ListFind](/boxlang-language/reference/built-in-functions/list/listfind.md)
* [ListFindNoCase](/boxlang-language/reference/built-in-functions/list/listfindnocase.md)
* [ListFirst](/boxlang-language/reference/built-in-functions/list/listfirst.md)
* [ListGetAt](/boxlang-language/reference/built-in-functions/list/listgetat.md)
* [ListGetEndings](/boxlang-language/reference/built-in-functions/list/listgetendings.md)
* [ListIndexExists](/boxlang-language/reference/built-in-functions/list/listindexexists.md)
* [ListItemTrim](/boxlang-language/reference/built-in-functions/list/listitemtrim.md)
* [ListLast](/boxlang-language/reference/built-in-functions/list/listlast.md)
* [ListLen](/boxlang-language/reference/built-in-functions/list/listlen.md)
* [ListMap](/boxlang-language/reference/built-in-functions/list/listmap.md)
* [ListNone](/boxlang-language/reference/built-in-functions/list/listnone.md)
* [ListPrepend](/boxlang-language/reference/built-in-functions/list/listprepend.md)
* [ListQualify](/boxlang-language/reference/built-in-functions/list/listqualify.md)
* [ListReduceRight](/boxlang-language/reference/built-in-functions/list/listreduceright.md)
* [ListRemoveDuplicates](/boxlang-language/reference/built-in-functions/list/listremoveduplicates.md)
* [ListRest](/boxlang-language/reference/built-in-functions/list/listrest.md)
* [ListSetAt](/boxlang-language/reference/built-in-functions/list/listsetat.md)
* [ListSome](/boxlang-language/reference/built-in-functions/list/listsome.md)
* [ListSort](/boxlang-language/reference/built-in-functions/list/listsort.md)
* [ListToArray](/boxlang-language/reference/built-in-functions/list/listtoarray.md)
* [ListTrim](/boxlang-language/reference/built-in-functions/list/listtrim.md)
* [ListValueCount](/boxlang-language/reference/built-in-functions/list/listvaluecount.md)
* [ListValueCountNoCase](/boxlang-language/reference/built-in-functions/list/listvaluecountnocase.md)


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