April 2025
Intermediate to advanced
124 pages
2h 8m
Italian
Content preview from Tidy First?
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Capitolo 22. Elementi di parentela beneficiaria
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Che cos'è il design del software? Non mi piace iniziare con le definizioni, ma ormai non abbiamo più nulla da fare. Hai visto degli esempi di ciò che intendo per progettazione. Hai visto come le singole decisioni si concatenano per raggiungere obiettivi più grandi. Hai visto i primi scorci di ciò che intendo con "la progettazione del software è un esercizio di relazioni umane". Ora posso dire cosa intendo per "progettazione del software": mettere in relazione benefica gli elementi.
Non sono molte parole per un grande concetto. Ogni parola deve avere un peso notevole. Scomponiamole e e poi rimettiamole insieme.
Elementi
Le strutture sostanziali hanno delle parti.
Organello → organo → organismo.
Atomi → molecole → cristalli.
Nel nostro mondo: token → espressioni → dichiarazioni → funzioni → oggetti/moduli → sistemi.
Gli elementi hanno dei confini. Sai dove iniziano e finiscono.
Gli elementi contengono sottoelementi. Nel nostro mondo ci piace avere gerarchie omogenee(secondo lo schema Composite). Le gerarchie naturali, come gli esempi precedenti, non sono omogenee. I sottoelementi contenuti differiscono dal contenitore. (Non sono sicuro che questo punto sia così importante, ma mi piace tenerlo a mente: un giorno scriverò un libro veramente filosofico sulla progettazione del software come processo ...
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