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The method mapNums returns a HashMap that stores values of how many times a given key digit has appeared in an input String. Write a...
X470: Hashmaps - Get from Map
The method mapNums returns a HashMap that stores values of how many times a given key digit has appeared in an input String. Write a method that calls mapNums and returns the number of times an input digit appeared in an input String. Note that if a digit did not appear, it won't be an existing key.
Examples:
getFromMap("asd27fghjk1234477", 3) -> 1
getFromMap("asd27fghjk1234477", 4) -> 2
getFromMap("asd27fghjk1234477", 5) -> 0
getFromMap("asd27fghjk1234477", 7) -> 3
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