On Wed, May 06, 2015 at 11:19:04PM -0400, Jason Woofenden wrote:
> Hi Hypsurus,
>
> I hope you're having fun coding. Don't let me detract from that.
> But if you just need to extract links from pdfs, you can do so with
> existing tools, eg:
>
> pdftohtml -stdout foo.pdf | sed -ne 's/\(^\|\n\)\n\([^\n]*\)\n[^\n]*/\1\2/gp;
> t; s/href="\([^"]\+\)"/\n\n\1\n/g; D'
>
> Sorry if that sed thing is more complex than it needs to be. I'm
> just learning the other sed commands besides s///.
>
> The extra complexity with the "\n"s is to handle multiple links on
> the same line.
Hi, is there any way of using sed *only* as equivalent to:
# The code change the variable if only the variable is found or else it
#+ append to the end of file.
# $1=xyz -> $1=$2, and $3 is the filename
grep -q "^$1=" $3 && sed -i "/^$1=/c $1=$2" $3 || echo "$1=$2" >> $3
If you do find a way, can you explain it. Thanks.
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