當(dāng)切片傳遞時(shí)，很難預(yù)測(cè)底層原始數(shù)組是否正在發(fā)生變異，或者原始數(shù)組的副本是否正在發(fā)生變異a = [3]int {0, 1, 2}s = a[:]s[0] = 10a[0] == s[0] // trues = append(s, 3)s[0] = 20a[0] == s[0] // false假設(shè)今天我有這樣的處理a = [3]int {0, 1, 2}s = some_func(a[:]) // returns sliceprocess(s) // a is getting mutated because so far some_func hasn't caused the underlying array to be copied現(xiàn)在明天a = [3]int {0, 1, 2}s = some_func(a[:]) // returns slice, does append operationsprocess(s) // a is not getting mutated because some_func caused the underlying array to be copied那么切片的最佳實(shí)踐是什么？