# ListPrepend

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

## Method Signature

```
ListPrepend(list=[string], value=[string], delimiter=[string], includeEmptyFields=[boolean], multiCharacterDelimiter=[boolean])
```

### Arguments

| Argument                  | Type      | Required | Description                                                    | Default |
| ------------------------- | --------- | -------- | -------------------------------------------------------------- | ------- |
| `list`                    | `string`  | `true`   | string list to filter entries from                             |         |
| `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

### Prepend to a List using the List member function

[Run Example](https://try.boxlang.io/?code=eJwrTs3MS0vNSfHJLC5RsFVQcs7JL05VCEnMyU4t0gnOLy1Q8EusylSy5ipGVYjM1csBEgFFqQWpeSkaCkoBpWlplQrBGZlFJUoKmtZc5UWZJan%2BpSUFpSUaKPpAkgBktCyy)

```java
seinfeldList = "Close Talker,Soup Nazi";
seinfeldList = seinfeldList.listPrepend( "Puffy Shirt" );
writeOutput( seinfeldList );

```

Result: "Puffy Shirt,Close Talker,Soup Nazi"

### Prepend to a List using a dash delimiter

[Run Example](https://try.boxlang.io/?code=eJwrzs9N9cksLlGwVVAy1DXSNdY1UbLmKkaI5gCpgKLUgtS8FA0FmLiOgpKBEpDQVVLQtOYqL8osSfUvLSkoLUEoAUkAADlxHIQ%3D)

```java
someList = "1-2-3-4";
someList = listPrepend( someList, "0", "-" );
writeOutput( someList );

```

Result: "0-1-2-3-4"

### Prepend to a List with Empty Fields On

CF2018+

[Run Example](https://try.boxlang.io/?code=eJwrzs9N9cksLlGwVVByS03S8U0s0nEsKFKy5ipGyOQAqYCi1ILUvBQNBZi4joKSjo5XYp4SiAEkSopKUxU0rbnKizJLUv1LSwpKSxCKQRIAUHoiJw%3D%3D)

```java
someList = "Feb,Mar,Apr";
someList = listPrepend( someList, ",,Jan", ",", true );
writeOutput( someList );

```

Result: ",,Jan,Feb,Mar,Apr"

### Prepend to a List with Empty Fields Off

CF2018+

[Run Example](https://try.boxlang.io/?code=eJwrzs9N9cksLlGwVVByS03S8U0s0nEsKFKy5ipGyOQAqYCi1ILUvBQNBZi4joKSjo5XYp6OjhKICSTSEnOKUxU0rbnKizJLUv1LSwpKSxDqQRIArBoiyg%3D%3D)

```java
someList = "Feb,Mar,Apr";
someList = listPrepend( someList, ",,Jan,,", ",", false );
writeOutput( someList );

```

Result: "Jan,Feb,Mar,Apr"

### Additional Examples

[Run Example](https://try.boxlang.io/?code=eJxVzU0KwjAQhuF9TjHMKoXBHKC4ELRQqCDkBNrOIpA%2Fkkn1%2BFaqC1ff5uN5jQHrQvYMl9f9s%2BpZnHBqkpto8K7KrXDmuGhA26qj6WSJfJuZiUi4ChLgGCsX4QWhg65XxsCVw4MLDC3O4lJUVcq0YXAEpHED0so%2FBfs9em4ha%2FgeD%2F%2FpwZWttOtvId86jw%3D%3D)

```java
// Simple Example
writeoutput( listPrepend( "Susi,LAS,,boxlang,,,test", "Inserted" ) );
// Member Function
strList = ",I,,love,boxlang,,";
writeDump( strList.listPrepend( "First" ) );

```

## Related

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


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