Sometimes you may need to apply a test to some input sequences and return a truth value based upon what the test returned for all of the inputs. For example, you might want to know whether any number in a sequence is outside of a specified range, or whether every word is at least five letters long. The predicate is applied to successive elements of the input sequences until the the result of the mapping function can be determined. If the predicate is false for every input, SOME returns a false value. This book may not be reproduced without the written consent of its author.
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