# StructKeyList

Get keys of a struct as a string list

## Method Signature

```
StructKeyList(structure=[structloose], delimiter=[string])
```

### Arguments

| Argument    | Type     | Required | Description | Default |
| ----------- | -------- | -------- | ----------- | ------- |
| `structure` | `struct` | `true`   |             |         |
| `delimiter` | `string` | `false`  |             | `,`     |

## Examples

### Using Custom Delimiter

Retrieve a pipe separated list of keys

[Run Example](https://try.boxlang.io/?code=eJwrLkksKS12zk9JLVawVahW4OL091awUjAyMNDh4nQOcnUMcXUB8w2BfD%2F%2FkHhffxdPN0%2BwoLGBCVDQydElPsg1MNQ1OAQoZgLWCFLo5h%2Fq5wIWMeGqteYqL8osSXUpzS3QUCguKSpNLvFOrfTJLC4BceFO0FFQUqgBYk0FTWsuADhoKX4%3D)

```java
statusCodes = { 
	OK : 200,
	CREATED : 201,
	NOT_MODIFIED : 304,
	BAD_REQUEST : 400,
	NOT_FOUND : 404
};
writeDump( structKeyList( statusCodes, " | " ) );

```

Result: "OK | CREATED | NOT\_MODIFIED | BAD\_REQUEST | NOT\_FOUND"

### Using Member Function

Retrieve a comma separated list of keys using the member function

[Run Example](https://try.boxlang.io/?code=eJwrLkksKS12zk9JLVawVahW4OL091awUjAyMNDh4nQOcnUMcXUB8w2BfD%2F%2FkHhffxdPN0%2BwoLGBCVDQydElPsg1MNQ1OAQoZgLWCFLo5h%2Fq5wIWMeGqteYqL8osSXUpzS3QUChG2KmXnVrpk1lcoqGpoGnNBQD98yWb)

```java
statusCodes = { 
	OK : 200,
	CREATED : 201,
	NOT_MODIFIED : 304,
	BAD_REQUEST : 400,
	NOT_FOUND : 404
};
writeDump( statusCodes.keyList() );

```

Result: "OK,CREATED,NOT\_MODIFIED,BAD\_REQUEST,NOT\_FOUND"

### Additional Examples

[Run Example](https://try.boxlang.io/?code=eJxLzMvMTcwpVrBVqFbg4nT2D1ewUlDKzc9X0uHiDPB0B%2FHyM%2FOyQVxnxxCwZGp%2BOYjr5BnkAuInZ2QWFShx1Vpz6esrBJcUlSaXeKdW%2BmQWl2gkQgzX5IIwQGJAi1DVKEAVKWhac6UmZ%2BTDBMCKgWIAVPcwOQ%3D%3D)

```java
animals = { 
	COW : "moo",
	PIG : "oink",
	CAT : "meow",
	BIRD : "chirp"
};
// StructKeyList(animals)
animalList = StructKeyList( animals );
echo( animalList );

```

## Related

* [StructAppend](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structappend)
* [StructClear](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structclear)
* [StructCopy](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structcopy)
* [StructDelete](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structdelete)
* [StructEach](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structeach)
* [StructEquals](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structequals)
* [StructEvery](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structevery)
* [StructFilter](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structfilter)
* [StructFind](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structfind)
* [StructFindKey](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structfindkey)
* [StructFindValue](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structfindvalue)
* [StructGet](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structget)
* [StructGetMetadata](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structgetmetadata)
* [StructInsert](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structinsert)
* [StructIsCaseSensitive](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structiscasesensitive)
* [StructIsOrdered](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structisordered)
* [StructKeyArray](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structkeyarray)
* [StructKeyExists](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structkeyexists)
* [StructKeyTranslate](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structkeytranslate)
* [StructMap](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structmap)
* [StructNew](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structnew)
* [StructNone](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structnone)
* [StructReduce](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structreduce)
* [StructSome](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structsome)
* [StructSort](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structsort)
* [StructToQueryString](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structtoquerystring)
* [StructToSorted](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structtosorted)
* [StructUpdate](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structupdate)
* [StructValueArray](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/struct/structvaluearray)


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