> ## Documentation Index
> Fetch the complete documentation index at: https://stedi.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Other functions

## \$lookupTable

**Signature:** `$lookupTable(table, filterKeys, filterPredicates[, options])`

**Parameters:**

* `table` - Source lookup table. All lookup tables are available inside \$tables global variable
* `filterKeys` - String or array of strings of keys to filter on
* `filterPredicates` - One or more predicates to filter on. If `filterKeys` is an array, `filterPredicates` must be an array of the same length
* `options` - Object with optional properties:
  * `wildcard` - Wildcard string to use for matching. E.g. if set to "\*", then "express\_aero" will match "express\_\*".

Returns row from a lookup table where all filter conditions are satisfied.
Supports [wildcard matching](/edi-platform/mappings/jsonata/common-mapping-expressions#lookup-table-wildcards).
This function is provided by Stedi and isn't a part of the JSONata standard library.

**Example**

Given following lookup table named "shipping":

| Key | Value       | Preferred |
| --- | ----------- | --------- |
| 1   | express     | false     |
| 2   | standard    | false     |
| 2   | overnight   | true      |
| 3   | express\_\* | false     |

| Expression                                                                               | Result              |
| ---------------------------------------------------------------------------------------- | ------------------- |
| `{'$lookupTable($tables.shipping, "Key", "1").Value'}`                                   | `"express"`         |
| `{'$lookupTable($tables.shipping, "Key", "2").Preferred'}`                               | `["false", "true"]` |
| `{'$lookupTable($tables.shipping, ["Key", "Preferred"], ["2", "true"]).Value'}`          | `"overnight"`       |
| `{'$lookupTable($tables.shipping, "Value", "express_aero", { "wildcard": "\*" }).Key'}`  | `"3"`               |
| `{'$lookupTable($tables.shipping, "Value", "express_other", { "wildcard": "\*" }).Key'}` | `"3"`               |

## \$uuid

**Signature:** `$uuid()`

Create a version 4 (random) UUID.
This function is provided by Stedi and isn't a part of the JSONata standard library.

**Example**

| Expression | Result                                   |
| ---------- | ---------------------------------------- |
| `$uuid()`  | `"1a28e35f-d420-4b95-ad09-1bb4b39821dc"` |