- changes the addressed list size without affecting list allocation. Can be useful for the following type of coding pattern: - pre-allocate a List with some max content length - populate with some content (likely not the entire pre-allocated size) - truncate the list to the length of valid content - process the List - discard the List Since the List is being discarded, using resize_unsafe() instead of resize() avoids an additional allocation with the new size and copying/moving of the elements. This programming pattern can also be used when the List is being returned from a subroutine, and carrying about a bit of unused memory is less important than avoiding reallocation + copy/move. If used improperly, it can obviously result in addressing into unmanaged memory regions (ie, 'unsafe'). |
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Test-List.C |