And by that point, inventors had been trying for years to fly, so the public was ready to believe a machine could deliver on the promise. Twenty years earlier, powered flight was science fiction to most people. But news of the first successful flight at Kitty Hawk was reported breathlessly by newspapers around the country, and airplanes were soon embraced by an excited public.
For instance, let’s say we’re programming a module that controls an electrical gate of a canal lock. If the public API was to require a voltage value needed for the engine to lift the gate - that would violate the Information Hiding a great deal. First of all, the user of the module would need to know the details of the engine. Second of all, changing the gate to a pneumatic one would completely break all the code that uses the module. In terms of software design the equivalent violation would be to catch SqlException in the Business-Module. If I were to propose an implementation that leverages Information Hiding, it would be to accept the opening ratio instead of the voltage.
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