idempotent
US /ˌaɪ.demˈpoʊ.t̬ənt/
UK /ˌɪd.əmˈpəʊ.tənt/
形容词
幂等的
(of an operation or function) producing the same result if it is applied to itself once or repeatedly
示例:
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In mathematics, an operation is idempotent if applying it multiple times yields the same result as applying it once.
在数学中，如果一个操作多次应用后产生与一次应用相同的结果，则该操作是幂等的。
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Saving a file is an idempotent action; saving it multiple times doesn't change the final state of the file.
保存文件是一个幂等操作；多次保存不会改变文件的最终状态。