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Simple sed one-liner for fixing unencoded ampersands

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Top Forums Shell Programming and Scripting Simple sed one-liner for fixing unencoded ampersands
# 8  
Old 07-28-2008
Can someone please explain this?
echo "&test &" | perl -ane '$_ =~ s/(&)([^amp;|^quot;])/$1amp;$2/ig;print'

&test & Smilie



echo "&best &" | perl -ane '$_ =~ s/(&)([^amp;|^quot;])/$1amp;$2/ig;print'

&best & Smilie
# 9  
Old 07-29-2008
Quote:
Originally Posted by tobbe
echo "&test &" | perl -ane '$_ =~ s/(&)([^amp;|^quot;])/$1amp;$2/ig;print'

&test & Smilie



echo "&best &" | perl -ane '$_ =~ s/(&)([^amp;|^quot;])/$1amp;$2/ig;print'

&best & Smilie
First, I should mention that it's literally impossible to convert mixed-encoding text, because you can never be sure whether something was supposed to be literal or not. If this is produced by a program under your control, then that's different, but if your developers are including naked ampersands, it defies the laws of information theory to be able to fix it perfectly.

That said, at this point, just do this:
Code:
echo 'foo' | sed 's/&/\&/g; s/&/\&/g; s/"/\"/g;'

And then beat your developers over the tops of their heads until they stop producing bad code.
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