Given two lists, combine them into a Map where the first list provides the keys and the second list provides the values. If the lists have different lengths, only zip up to the shorter length. Return an empty map for null or empty inputs.
Examples:
Input: keys = ['a', 'b', 'c'], vals = [1, 2, 3]
Output: {'a': 1, 'b': 2, 'c': 3}
Explanation: Each key is paired with the value at the same index
Input: keys = ['x', 'y'], vals = [10, 20, 30]
Output: {'x': 10, 'y': 20}
Explanation: Only the shorter list length is used, so index 2 is ignored
Input: keys = [], vals = []
Output: {}
Explanation: Empty lists produce an empty map
Input: keys = null, vals = [1, 2]
Output: {}
Explanation: Null input returns an empty map
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