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Search hash table for an item
| Number | Type | Compulsory | Default | Description | 
|---|---|---|---|---|
| 1 | real | Yes | 
 | Hash table id as return by | 
| 2 | string array | Yes | 
 | Keys to search | 
| 3 | string | No | Empty string | Empty tag | 
This can be an array provided that the table was not defined as 'multiple' on creation.
Return type: string array
For non-multiple tables, return value has the same length as argument 2. Each element maps to the corresponding element in argument 2.
For multiple tables, the return value is a lit of all items that were found matching the search value.
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