Re^2: Typo or on purpose? Variable instantiation with string concatenation operator

Not relevant for this specific case, but there is a difference if the thing being appended is a number:

$ perl -e'use Devel::Peek; my $x = 5; Dump($x) ; my $y .= 5; Dump($y);
+'
SV = IV(0x2fc84) at 0x2fc88
  REFCNT = 1
  FLAGS = (PADMY,IOK,pIOK)
  IV = 5
SV = PV(0x13838) at 0x2fcd8
  REFCNT = 1
  FLAGS = (PADMY,POK,pPOK)
  PV = 0x2ac18 "5"\0
  CUR = 1
  LEN = 12
[download]

i.e. .= will stringify on assigment.

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Re^3: Typo or on purpose? Variable instantiation with string concatenation operator by ikegami (Patriarch) on Oct 07, 2015 at 19:37 UTC
Good point. I'd use the following if I wanted to force stringification: `my $str1 = "".$self->sanitizeString($input1);` [download]	[reply] [d/l]