#2: Conditional Mutation
Tagged as challenge
Written on 2018-01-30
Create a procedure called set-if! such that
(set-if! <predicate> <symbol> <value>)means that <symbol> is not set to <value> if <predicate> is not true.
Follow up questions:
Why can't this be a function in most languages?
What are the subtlties of the semantics of this? What behavior is not defined by the above?
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