2015-04-19 22:32:01 +00:00
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\emph{Referential transparency}, as in:
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\slidep
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\begin{itemizep}
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\item everything (variables, data structures...) is \emph{immutable}
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\item expressions never have side-effects (remember: mathematical functions)
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\item same input $\mapsto$ same output... \emph{always}!
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2015-04-20 18:55:41 +00:00
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\item replace a function with it's (return) value? Yes. What happens in C or java if you do that? Remember \cppinline{void pop();}?
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2015-04-19 22:32:01 +00:00
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\end{itemizep}
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\slidep
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\vspace{\baselineskip}
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possible benefits?
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\begin{itemizep}
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\item parallelism
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\item equational reasoning and refactoring
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\item less bugs!
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\end{itemizep}
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\slidep
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\vspace{\baselineskip}
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Question: call-by-value? call-by-reference? call-by-need?
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