Хотел написать сам, но заглянул в справку и понял что лаконичней у меня не получится. Читай и думай:
Цитата:
Within the body of a routine, open array parameters are governed by the following rules.
They are always zero-based. The first element is 0, the second element is 1, and so forth. The standard Low and High functions return 0 and Length - 1, respectively. The SizeOf function returns the size of the actual array passed to the routine.
They can be accessed by element only. Assignments to an entire open array parameter are not allowed.
They can be passed to other procedures and functions only as open array parameters or untyped var parameters. They cannot be passed to SetLength.
Instead of an array, you can pass a variable of the open array parameter's base type. It will be treated as an array of length 1.
When you pass an array as an open array value parameter, the compiler creates a local copy of the array within the routine's stack frame. Be careful not to overflow the stack by passing large arrays.
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