X42: frontPiece

Given an int array of any length, return a new array of its first 2 elements. If the array is smaller than length 2, use whatever elements are present.

Examples:

frontPiece({1, 2, 3}) -> {1, 2}

frontPiece({1, 2}) -> {1, 2}

frontPiece({1}) -> {1}

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