douji0588 2013-05-30 14:25
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如何查找两个切片是否引用了相同的内存?

Consider this example:

sliceA := make([]byte, 10)
sliceB := make([]byte, 10)

// sliceA and sliceB are referencing different memory,
// witch eventually may contain same data

sliceC := sliceA[:]

// sclieC references same memory as sliceA
sliceD := sliceA[1:2]; sliceE := sliceA[4:5]
// assert that sliceD and sliceE share same block of memory

Is there any way to check that 2 slices are references (or not) to the same memory?

EDIT

The slices that I want to compare might not point to the same segment of underlying block of memory.

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  • douyu2817 2013-05-30 14:53
    关注

    Two non nil instances, a and b, of type []T, share the same backing array iff

    &a[cap(a)-1] == &b[cap(b)-1]
    

    Note that it may be necessary to reslice a and or b before the test.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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