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CSE 2221 A Grade Exam | Study Questions Solved 100% Correct
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CSE 2221 A Grade Exam | Study Questions Solved 100% Correct
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CSE 2221 A Grade Exam | StudyQuestions Solved 100% Correct
What does the map function void add(K key, V value)? - ANSWER adds the pair (key, value) to
this
aliases: references key, value
updates this
requires
key is not in domain (this)
ensures
this = #this union {(key, value)}
What is Map.Pair? - ANSWER another interface that is simply an order pair of a key and value,
has only two methods key() and value() which simply return the value of key and value
respectively
What does the map function Map.Pair<K,V> remove (K key) do? - ANSWER Removes form this
the pair whose first component is key and returns it
Updates this
requires key is in domain(this)
ensures
remove.key = key and
remove is in#this and
this = #this \ {remove}
, What does the map function Map.Pair<K,V> removeAny() do? - ANSWER Removes and returns
an arbitrary pair from this
updates this
requires
|this| > 0
ensures
removeAny is in #this and
this = #this \ {removeAny}
What does the map function V value(key) do? - ANSWER Reports the value associated with
key in this
aliases reference returned by value
Requires
key is in Domain(this)
Ensures
(key, value) is in this
What does the map function boolean hasKey(K key) do? - ANSWER Reports whether there is
a pair in this whose first component is key
ensures
hasKey = (key is in domain(this))
What does the map function V replaceValue(K Key, V Value) do? - ANSWER replaces the value
assoicated with key in this by value and returns the old value
aliases reference value
updates this
requires
key is in domain(this)
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