Re^2: Is this normal

a non-match does not return 0. It returns the empty string

Strictly speaking, it returns PL_sv_no, which has both a numerical value of 0 and a string value of "":

$ perl5140 -MDevel::Peek -e 'Dump scalar(/x/)'
SV = PVNV(0x275ee10) at 0xa26500
  REFCNT = 2147483647
  FLAGS = (IOK,NOK,POK,READONLY,pIOK,pNOK,pPOK)
  IV = 0
  NV = 0
  PV = 0x275ee00 ""\0
  CUR = 0
  LEN = 16
[download]

Dave.

Comment on Re^2: Is this normal Download Code

Replies are listed 'Best First'.
Re^3: Is this normal by JavaFan (Canon) on Jan 07, 2012 at 08:45 UTC
You are correct. However, the OP is printing out the values, so the string value will be taken.	[reply]