How to replace char in file with appropriate ascii code in vim…

How to replace char in file with appropriate ascii code in vim… In a vim buffer if I have a list of characters say:
Asked by: Guest \| Views: 327

Total answers/comments: 1

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Guest [Entry]

"Check out str2numchar.vim. Down load & install in your vim plugins folder. Add the example visual mode key map to your .vimrc file:

vmap <silent> sn :Str2NumChar<CR>

In vim, highlight the text you want to convert and type sn."