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#define SVf_IOK 0x00000100 /* has valid public integer value
#define SVf_NOK 0x00000200 /* has valid public numeric value
#define SVp_IOK 0x00001000 /* has valid non-public integer va
#define SVp_NOK 0x00002000 /* has valid non-public numeric va
#define SVp_POK 0x00004000 /* has valid non-public pointer va
By rote learning.
Via Genetic memory.
It's provided by my firmware.
I just remember them.
Thirty days hath September
My computer gets it right, usually.
I just ask someone else.
Someone punches me on the first of the month.
Results (191 votes),