Secure go language build target from source array slice

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Today in the QQ group chat to go language needs to improve the place, happy to spit a groove. I'd most like to change the syntax of the array-building slice, because the popular [start:end] approach is not rigorous at the moment. Later, when I did not remember which version, I introduced the three-segment [Start:end:max] syntax to create the slice. It's safe, but it's a lot uglier.

As the following example shows, the definition of a two-segment will contaminate the source array after the Append operation:

A: = [5]int{1, 2, 3, 4, 5} S1: = A[1:3:3] S2: = A[1:3] _ = Append (S1, 6) fmt. Println (a)//out:[1 2 3 4 5] _ = Append (s2, 7) fmt. Println (a)//out:[1 2 3 7 5]

On the improvement of the new function, Chai sent me to the Mail group, thanking Chai big.