Lookup tables are also used extensively to validate input values by matching against a list of valid -LRB- or invalid -RRB- items in an array and , in some programming languages , may include pointer functions -LRB- or offsets to labels -RRB- to process the matching input .

Lookup tables are also used to validate input values by matching against a list of valid -LRB- or invalid -RRB- items in an array .
