Question

I have a site that need to made some mass edit, I used sed to perform most of the task but add the heading tag(<h1>, <h2>) is so tricky that I can’t think up of a way to due with:

The pattern that I could guarantee is as follow:

<td class="content_subhd">Heading Name</td>

I want to change it to:

<td class="content_subhd"><h2>Heading Name</h2></td>

Where Heading Name is not static, it is different on each page and this is why I can use substitute to due with it.

Any suggestion?

Answer 1

2 tricks needed:

1. Use pattern grouping \( ... \) and reinsertion \1

2. Use a colon as pattern seperator instead of / to avoid excessive quoting

Result:

 sed 's:\(<td class="content_subhd">\)\(.*\)\(</td>\):\1<h2>\2</h2>\3:'