How to replace a `\norm{ some string }` by `\| some string\|` quickly? [duplicate]

Question

This question already has answers here: Find and replace strings in vim on multiple lines (11 answers) Vim - Capture strings on Search and use on Replace (4 answers) Closed 3 years ago. I am editing a markdown file with vim. This file exist many string \norm{ some string }. I want to replace them by \| some string \|. Does there exist any quick way? Thanks very much. The answer in Find and replace strings in vim on multiple lines can not answer my question. It just talk about general replacing for one line and multi line. Here I want to replace a surrounding and keep the string in the surrounding. JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

What you're looking for are so-called capture groups and backreferences. Provided there are no nested forms (curly braces inside do not mean a problem in themselves) and forms spanning multiple lines, a quick solution could be: %s/\\norm {\(.*\)}/\\|\1\\|/g. The \1 in the substitution part refers to the group captured by \(.*\), i.e. the original content inside the outermost pair of curly braces. See e.g. http://www.vimregex.com/#backreferences for more.