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I'm a beginner, I'd like someone to help me understand a few lines of code</div>
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My questions are:</div>
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1) Maybe String is an application of the constructor Maybe to the type String.</div>
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What does it mean? Is there anything equivalent in the C language?</div>
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2) Is this a function with three arguments?</div>
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<strong>type T = [Char]</strong></div>
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<strong>type P = (Char, Maybe String)</strong></div>
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<strong>type Delta = ((Maybe Char, Char), Maybe String)</strong></div>
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<strong>fromGtoM :: T -> [P] -> [Delta]</strong></div>
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3) is this a usage of the above mentioned function?</div>
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<strong>fromGtoM t p = terminalRules ++ varRules</strong></div>
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I dont'see why the function has three arguments but then only</div>
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two are used t p.</div>
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4) what does <strong>++</strong> mean ?</div>
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Sorry, for posting too many questions.</div>
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Thanks in advance.</div>
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--</div>
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moowoo9@fastmail.fm</div>
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