gsub oddity?

[Michael Neumann]

Hi,

"\000".gsub("\000") { "\\000" }
# => "\\000"

"\000".gsub("\000", "\\000")
# => "\00000"

I expected both to return the same result.
Just tell me it's not a bug and I'm happy

Regards,

Michael

 

[ts]

M> Just tell me it's not a bug and I'm happy

This is not a bug

svg% ruby -e 'p "\000".gsub("\000", "\\&00")'
"\00000"
svg%



Guy Decoux

 

[Mark Hubbart]

Hi,

"\000".gsub("\000") { "\\000" }
# => "\\000"

"\000".gsub("\000", "\\000")
# => "\00000"

I expected both to return the same result.
Just tell me it's not a bug and I'm happy

Not a bug

When used in an argument rather than in a block, \0 inserts the matched
string. So gsub("\000", "\\000") is really saying "replace any null
characters with themselves followed by two zeros".

The block form does not interpolate backslashed matches.

cheers,
--Mark