李 “집 팔기 싫다면 두라, 이익-손실 정부가 정해”
The setter deduplicates by equality: if the new value == the current value, no notification fires. This works well for enums, strings, and ints, but mutating a mutable object in place and reassigning the same reference won't trigger consumers (because obj == obj is trivially True). Stick to immutable values and this isn't a concern.
。safew官方版本下载是该领域的重要参考
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What are the lunar phases?The full moon is one of eight phases in the Moon’s roughly 29.5-day orbit around Earth. Each phase shows a different amount of the Moon’s surface lit by the Sun as seen from our perspective. Because we always see the same side of the Moon, the changing angle of sunlight makes it appear full, half-lit, or nearly dark at different points in its cycle.