Re^5: Warning in objImageMagick

Hi Anonymous,

Actually there's still a bug in there, you'll still get the same "Argument ... isn't numeric in addition" warning when Read fails. warn "message... ".0+$obj_temp is interpreted by Perl as warn "message... 0" + $obj_temp; (i.e. the concatenation happens first) instead of what you want, warn "message... ".(0+$obj_temp). Try it yourself: perl -MO=Deparse,-p -e 'warn "message... ".0+$obj_temp'

The reason is the operators + and . have the same precedence but are left associative (compare the output of the aforementioned Deparse with this: perl -MO=Deparse,-p -e 'warn 0+$obj_temp."message... "'). You should use parentheses to set the precedence and for clarity.

Regards,
-- Hauke D

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Re^6: Warning in objImageMagick by Anonymous Monk on Apr 02, 2016 at 18:23 UTC
So this line should be like this: `warn "Error Number: ".$1." Number of images read: ".(0+$obj_temp) if $ +obj_temp =~ /(\d+)/;` [download]	[reply] [d/l]
Re^7: Warning in objImageMagick by haukex (Archbishop) on Apr 02, 2016 at 18:39 UTC
Hi Anonymous, Yes, that's correct. Personally I'd write it with an `if (...) {...}` as I showed in Re^3: Warning in objImageMagick, but since either works, it's up to you. Regards, -- Hauke D	[reply] [d/l]
Re^8: Warning in objImageMagick by Anonymous Monk on Apr 02, 2016 at 19:03 UTC
Thank you for your help! Issue solved!!!!	[reply]