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Refer to Customizing components Edit a Component to see how it's done if you have not done this before.

Navigate to MatchRules.lua in the Project Tree. This is the function we need to alter:

function MatchFile(FileName)
   return true
end

The file reader component is deliberately simple and uses /wiki/spaces/IXB/pages/3181903910 separation of concerns to make it more obvious how to modify the code to meet new needs. We need this function to return true when the matching criteria are met.

Create a third function, APPmatchPrefix, to determine if the filename matches the prefix. You can copy the code below:

function APPmatchPrefix(Prefix, FileName)
   local Part = FileName:sub(1, #Prefix)
   trace(Part, Prefix)
   return (Part == Prefix)
end

See the screenshot below and add a line to MatchFile to call and invoke AppmatchPrefix.

Concepts used:

• A function

• https://interfaceware.atlassian.net/wiki/spaces/IXB/pages/2684813341/Operator+on+# Operator on Strings to get the length of the prefix

• String:sub()

• Equality and inequality operators