12th April 2022

Computer Science⚑

GNULinux⚑

Basics⚑

• New: Get command output or default value if emtpy.

  echo | sed 's/^$/default value/'
  

neovim⚑

• New: Search for visual selection.

  vnoremap // y/\V<C-R>=escape(@",'/\')<CR><CR>
  

  To use the mapping, visually select the characters that are wanted in the search, then type // to search for the next occurrence of the selected text.

sed⚑

• New: Use matched pattern.

  echo "foobarbaz" | sed 's/^foo\(.*\)baz$/\1/'
  

  Returns bar.