That should be a, not A. A will remove trailing 0x20 bytes.

S might be correct even on big-endian machines.

If the OP was using a little-endian machine, we can only rule out the last one from the info provided.

See Mini-Tutorial: Formats for Packing and Unpacking Numbers for a convenient table of pack/unpack numeric formats.

In reply to Re^2: unpack into arrayrefs? by ikegami
in thread unpack into arrayrefs? by Anonymous Monk

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