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Complete the function countStrings() so that it returns the count of Strings in the array names that are not null.
X625: Count non-null strings
Complete the function countStrings() so that it returns the count of Strings in the array names that are not null.
Examples:
countStrings({}) -> 0
countStrings({"pedro",null}) -> 1
countStrings({"pedro",null,"maria"}) -> 2
countStrings({"pedro","maria","don"}) -> 3
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